CN113127969A - Automobile damping plate simulation modeling method, device, equipment and storage medium - Google Patents
Automobile damping plate simulation modeling method, device, equipment and storage medium Download PDFInfo
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Abstract
The invention belongs to the technical field of automobiles, and discloses a method, a device, equipment and a storage medium for simulation modeling of an automobile damping plate, wherein the method determines the boundary line of the damping plate according to an image of the automobile damping plate; generating a damping plate wire frame according to the damping plate edge boundary, and determining a damping plate target surface according to the damping plate wire frame; dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm, and constructing a three-dimensional body unit according to the surface units; and modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model. According to the method, the real shape, thickness and attributes of the damping plate such as the boundary line and the wire frame of the damping plate are fully considered, the boundary and thickness of the damping plate can be truly reflected by a target damping plate simulation model obtained by utilizing a preset finite element analysis algorithm and a preset unit node fusion algorithm, the error is smaller, the simulation precision and reliability of the vehicle body model with the damping plate structure are improved, and the error of simulated vehicle body analysis is reduced.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method, a device, equipment and a storage medium for simulation modeling of an automobile damping plate.
Background
At present, due to the requirements of vibration reduction, sound insulation and rigidity improvement, plastic parts such as a damping plate and an epoxy reinforcing plate are often required to be attached to a metal plate of a vehicle body and a metal plate of a door cover system of an existing automobile, and particularly, the damping plate and the epoxy reinforcing plate mainly play a role in vibration reduction and sound insulation on a floor, a front wall plate, a rear wheel cover, a side wall outer plate and a vehicle door outer plate. However, when the existing simulation analysis of the mode, the rigidity and the local mounting point rigidity of the car body is performed, the damping plates and the epoxy reinforcing plates are ignored, so that errors exist in the mode analysis, and the calculation of the rigidity, particularly the local rigidity, is inaccurate.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for simulation modeling of an automobile damping plate, and aims to solve the technical problem that an automobile body model has errors when an automobile body mode is subjected to simulation analysis in the prior art.
In order to achieve the aim, the invention provides a simulation modeling method for an automobile damping plate, which comprises the following steps:
acquiring an image of a damping plate of an automobile, and determining a boundary line of the damping plate according to the image of the damping plate;
generating a damping plate wire frame according to the damping plate boundary line, and determining a damping plate target surface according to the damping plate wire frame;
dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm, and constructing a three-dimensional body unit according to the surface units;
and modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model.
Optionally, the step of acquiring an image of a damping plate of the automobile and determining a boundary line of the damping plate according to the image of the damping plate includes:
acquiring an image of a damping plate of an automobile, and determining an initial damping plate outline according to the image of the damping plate;
determining an initial boundary node corresponding to the initial damping plate profile according to a preset node distribution algorithm;
projecting the initial boundary node to a preset damping plate binding surface to obtain a target boundary node;
and determining a damping plate boundary line according to the target boundary node.
Optionally, the step of generating a damping plate wire frame according to the damping plate boundary line and determining a damping plate target surface according to the damping plate wire frame includes:
generating a damping plate wire frame according to the damping plate boundary line;
acquiring a binding surface of a preset damping plate;
and cutting the preset damping plate binding surface according to the damping plate wire frame to obtain a damping plate target surface, wherein the damping plate target surface is the upper surface of the preset damping plate binding surface.
Optionally, before the step of discretizing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm, the method further includes:
determining a preset set model according to the damping plate target surface, and importing the preset set model into a preset finite element analysis model;
determining node information, side information and surface information of the preset set model through a preset finite element analysis model;
judging whether the node information, the side information and the plane information meet preset quality information or not;
and when the node information, the side information and the surface information meet the preset quality information, a step of dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm is performed.
Optionally, the step of discretizing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm includes:
determining the size and the type of a preset grid according to a preset finite element analysis algorithm;
and carrying out finite element meshing on the target surface of the damping plate according to the size of the preset mesh and the type of the preset mesh so as to obtain a plurality of discrete surface units.
Optionally, the step of constructing a three-dimensional volume unit according to the face unit includes:
acquiring a preset component, a preset material type and a preset thickness;
stretching the surface unit according to the preset assembly to obtain an initial three-dimensional body unit;
and carrying out parameter setting on the three-dimensional unit according to the preset material type and the preset thickness so as to obtain the three-dimensional unit.
Optionally, the step of modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model includes:
obtaining the bottom surface of the three-dimensional body unit, and determining a bottom surface node corresponding to the bottom surface;
acquiring a target surface node corresponding to the target surface of the damping plate;
determining a preset fusion radius according to a preset unit node fusion algorithm;
and combining the bottom surface node and the target surface node within the preset fusion radius to obtain a target damping plate simulation model.
In addition, in order to achieve the above object, the present invention further provides an automobile damping plate simulation modeling apparatus, including:
the acquisition module is used for acquiring an image of a damping plate of an automobile and determining a boundary line of the damping plate according to the image of the damping plate;
the generating module is used for generating a damping plate wire frame according to the damping plate boundary line and determining a damping plate target surface according to the damping plate wire frame;
the dispersion module is used for dispersing the damping plate target surface into a plurality of surface units according to a preset finite element analysis algorithm and constructing a three-dimensional body unit according to the surface units;
and the fusion module is used for modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model.
In addition, in order to achieve the above object, the present invention further provides an automobile damping plate simulation modeling apparatus, including: the device comprises a memory, a processor and an automobile damping plate simulation modeling program which is stored on the memory and can run on the processor, wherein the automobile damping plate simulation modeling program is configured to realize the steps of the automobile damping plate simulation modeling method.
In addition, in order to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores an automobile damping plate simulation modeling program, and the automobile damping plate simulation modeling program realizes the steps of the automobile damping plate simulation modeling method when being executed by a processor.
According to the method, an image of a damping plate of an automobile is obtained, and a boundary line of the damping plate is determined according to the image of the damping plate; generating a damping plate wire frame according to the damping plate boundary line, and determining a damping plate target surface according to the damping plate wire frame; dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm, and constructing a three-dimensional body unit according to the surface units; and modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model. Compared with the existing rough damping plate model, the real shape, thickness and attributes of the damping plate such as the boundary line, the wire frame and the like of the damping plate are fully considered, the target damping plate simulation model obtained by utilizing the preset finite element analysis algorithm and the preset unit node fusion algorithm is more real and credible, the boundary and the thickness of the damping plate can be truly reflected, and the error is smaller. Meanwhile, the simulation precision and the reliability of the vehicle body model with the damping plate structure are improved, the error of simulation vehicle body analysis is reduced, and the technical problem that the vehicle body model has errors when the existing simulation analysis vehicle body mode exists is solved.
Drawings
FIG. 1 is a schematic structural diagram of an automobile damping plate simulation modeling device of a hardware operating environment according to an embodiment of the invention;
FIG. 2 is a schematic flow chart of a simulation modeling method for an automobile damping plate according to a first embodiment of the invention;
FIG. 3 is a schematic view of a damping plate attached to the floor of the vehicle body in this embodiment;
FIG. 4 is a schematic view of the boundary line and frame of the damping plate in this embodiment;
FIG. 5 is a schematic diagram of a discrete surface element in the present embodiment;
FIG. 6 is a schematic diagram of a three-dimensional unit in the present embodiment;
FIG. 7 is a schematic diagram illustrating the fusion of unit nodes of a three-dimensional volume unit according to the present embodiment;
FIG. 8 is a schematic flow chart of a simulation modeling method for an automobile damping plate according to a second embodiment of the present invention;
FIG. 9 is a block diagram of the first embodiment of the simulation modeling apparatus for damping plates of an automobile according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an automobile damping plate simulation modeling device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the simulation modeling apparatus for an automobile damping plate may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of an automotive damping plate simulation modeling apparatus, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and an automobile damping plate simulation modeling program.
In the simulation modeling apparatus for the damping plate of the automobile shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the automobile damping plate simulation modeling device can be arranged in the automobile damping plate simulation modeling device, and the automobile damping plate simulation modeling device calls an automobile damping plate simulation modeling program stored in the memory 1005 through the processor 1001 and executes the automobile damping plate simulation modeling method provided by the embodiment of the invention.
The embodiment of the invention provides a simulation modeling method for an automobile damping plate, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of the simulation modeling method for the automobile damping plate.
In this embodiment, the simulation modeling method for the automobile damping plate includes the following steps:
step S10: and acquiring an image of the damping plate of the automobile, and determining the boundary line of the damping plate according to the image of the damping plate.
It should be noted that the execution main body of this embodiment is the automobile damping plate simulation modeling device, where the automobile damping plate simulation modeling device may be a terminal on a computer, and may also be other devices that can achieve the same or similar functions.
It will be readily appreciated that the process of determining the damper plate edge lines from the actual damper plate image may include: determining an initial damping plate profile according to the damping plate image; determining an initial boundary node corresponding to the initial damping plate profile according to a preset node distribution algorithm; projecting the initial boundary node to a preset damping plate binding surface to obtain a target boundary node; and determining a damping plate boundary line according to the target boundary node.
Specifically, at present, plastic parts such as a damping plate and an epoxy reinforcing plate are often required to be attached to a metal plate of a vehicle body and a metal plate of a door cover system of an automobile, and particularly, the plastic parts mainly play roles in vibration damping and sound insulation on a floor, a front panel, a rear wheel cover, a side wall outer plate and a vehicle door outer plate. Referring to fig. 3, fig. 3 is a schematic diagram of a damping plate attached to a floor of a vehicle body in this embodiment, an initial damping plate profile may be determined according to a damping plate image corresponding to the damping plate attached to the floor of the vehicle body, an initial boundary node of the initial damping plate profile is selected on the damping plate image, the initial boundary node is a point indicated by a 1-a 7 in fig. 3, the initial boundary node is projected onto a bonding surface of a preset damping plate, and the bonding surface of the preset damping plate is a bonding surface (floor) of the damping plate; and projecting to obtain target boundary nodes, connecting the target boundary nodes by using lines to obtain a closed line which is almost completely consistent with the original shape of the damping plate, namely a damping plate edge boundary line, referring to fig. 4, wherein fig. 4 is a schematic diagram of the damping plate edge boundary line and a damping plate frame in the embodiment, and the damping plate edge boundary line is shown by a dotted line in fig. 4.
Step S20: and generating a damping plate wire frame according to the damping plate boundary line, and determining a damping plate target surface according to the damping plate wire frame.
It should be appreciated that the process of generating a damping plate wire frame from the damping plate boundary lines and determining a damping plate target surface from the damping plate wire frame may include: generating a damping plate wire frame according to the damping plate boundary line; acquiring a binding surface of a preset damping plate; and cutting the preset damping plate binding surface according to the damping plate wire frame to obtain a damping plate target surface, wherein the damping plate target surface is the upper surface of the preset damping plate binding surface.
Specifically, the target boundary nodes are connected by lines to obtain a closed line which is almost completely consistent with the original shape of the damping plate, namely a damping plate boundary line, a damping plate wire frame is generated according to the damping plate boundary line, and the damping plate boundary line is connected into a closed wire frame which is almost completely consistent with the original shape of the damping plate, namely the damping plate wire frame.
It is easy to understand that, with continued reference to fig. 4, the preset damping plate attachment surface may be segmented by a damping plate wire frame, which is a dashed line frame formed by dashed lines in fig. 4, to obtain a damping plate target surface on the attachment surface of the damping plate. The preset damping plate binding surface is a binding surface of a binding surface (floor) of the damping plate, namely the binding surface of the damping plate, the damping plate target surface is a surface in a pink wire frame, the damping plate target surface is almost completely consistent with the original outer contour of the damping plate, the size and the shape of ribs and holes after the damping plate is bound are reserved, and the damping plate target surface is a part of the upper surface of the floor.
Step S30: and dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm, and constructing a three-dimensional body unit according to the surface units.
It should be noted that the damping plate target surface is discretized into a plurality of surface units according to a preset finite element analysis algorithm, that is, finite element meshing is performed, and before finite element meshing is performed, meshing pre-processing work needs to be performed, so that preparation work is prepared for finite element meshing.
Specifically, the pre-meshing processing work may include: determining a preset set model according to the damping plate target surface, and importing the preset set model into a preset finite element analysis model; determining node information, side information and surface information of the preset set model through a preset finite element analysis model; judging whether the node information, the side information and the plane information meet preset quality information or not; and when the node information, the side information and the surface information meet the preset quality information, a step of dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm is performed.
It is easy to understand that the pre-meshing processing work is to introduce a preset set model determined by a damping plate target surface into a preset finite element analysis model before the finite element mesh is divided, the preset finite element analysis model may be finite element analysis software, which is not limited in this embodiment, and then determine whether the preset set model in the finite element analysis software has missing information such as edges, faces, and the like, and determine whether the node information, the edge information, and the face information satisfy preset quality information, the preset quality information may be set according to the meshing quality, when the preset quality information is not satisfied, the nodes, the edges, the faces, and the like affecting the meshing quality are deleted, and the preparation work is prepared for the finite element meshing.
It should be noted that the finite element meshing process may include: determining the size and the type of a preset grid according to a preset finite element analysis algorithm; and carrying out finite element meshing on the target surface of the damping plate according to the size of the preset mesh and the type of the preset mesh so as to obtain a plurality of discrete surface units. Specifically, a preset mesh size and a preset mesh type are determined, the preset mesh size is a predefined divided mesh size, the preset mesh type is a predefined mesh type, and the defined mesh type may be a triangle, a quadrangle, or a mixed mesh type, and the like, referring to fig. 5, fig. 5 is a schematic diagram of discrete surface units in this embodiment, and finite element mesh division is implemented on a target surface of a damping plate in finite element analysis software, and the target surface is discrete into a plurality of surface units.
It is easily understood that the process of constructing a three-dimensional volume unit from the face units may include: acquiring a preset component, a preset material type and a preset thickness; stretching the surface unit according to the preset assembly to obtain an initial three-dimensional body unit; and performing parameter setting on the three-dimensional body unit according to the preset material type and the preset thickness to obtain the three-dimensional body unit, referring to fig. 6, where fig. 6 is a schematic diagram of the three-dimensional body unit in this embodiment.
Specifically, a component can be newly built in the finite element analysis software, that is, a preset component is obtained, the plurality of discrete surface sheets are stretched to obtain a three-dimensional body unit, and the three-dimensional body unit is stretched according to a preset material type and a preset thickness, wherein the thickness of the stretched three-dimensional body unit is equal to the thickness of the damping plate. The thickness of the damping plate may be obtained by a design file or a physical measurement, or may be obtained by other methods, which is not limited in this embodiment. The shape, the contour and the thickness of the damping plate are repeatedly engraved into the three-dimensional unit, and the three-dimensional unit is high in precision and small in error.
Step S40: and modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model.
It should be understood that the process of modeling the three-dimensional body unit according to the preset unit node fusion algorithm to obtain the target damping plate simulation model may include: obtaining the bottom surface of the three-dimensional body unit, and determining a bottom surface node corresponding to the bottom surface; acquiring a target surface node corresponding to the target surface of the damping plate; determining a preset fusion radius according to a preset unit node fusion algorithm; and combining the bottom surface node and the target surface node within the preset fusion radius to obtain a target damping plate simulation model. Wherein, the preset fusion radius may be a predefined fusion radius.
Specifically, modeling the three-dimensional body unit according to a preset unit node fusion algorithm is realized through finite element analysis software, a certain amount of nodes are selected in the finite element analysis software, the nodes comprise bottom surface nodes corresponding to the bottom surface of the three-dimensional body unit and target surface nodes corresponding to the target surface of the damping plate, and a fusion radius is set, namely, all the nodes in the fusion radius can be fused into one point by one key.
It should be noted that, referring to fig. 7, fig. 7 is a schematic diagram illustrating cell node fusion of a three-dimensional volume unit in this embodiment. And combining a bottom surface node corresponding to the bottom surface of the three-dimensional body unit with a target surface node corresponding to the target surface of the damping plate, wherein the bottom surface of the three-dimensional body unit is a surface coincident with the target surface. And modeling the pasting behavior of the damping plate in a unit node fusion mode. Corresponding materials and properties are set for the component in which the three-dimensional volume unit is located. Other components also need to be modeled according to preset definitions. And the finally obtained target damping plate simulation model can be used for modal analysis. Because the target damping plate simulation model is a model added with the real shape, thickness, attribute and the like of the damping plate, the damping plate is considered when the model, the rigidity and the rigidity of the local mounting point of the vehicle body are simulated and analyzed, the error of modal analysis is reduced, and the accuracy of calculating the rigidity, particularly the local rigidity is improved.
In the embodiment, the boundary line of the damping plate is determined according to the damping plate image by acquiring the damping plate image of the automobile; generating a damping plate wire frame according to the damping plate boundary line, and determining a damping plate target surface according to the damping plate wire frame; dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm, and constructing a three-dimensional body unit according to the surface units; and modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model. Compared with the existing rough damping plate model, the real shape, thickness and attributes of the damping plate such as the boundary line and the wire frame of the damping plate are fully considered, the target damping plate simulation model obtained by utilizing the preset finite element analysis algorithm and the preset unit node fusion algorithm is more real and credible, the boundary and the thickness of the damping plate can be truly reflected, and the error is smaller. Meanwhile, the simulation precision and the reliability of the vehicle body model with the damping plate structure are improved, the error of simulation vehicle body analysis is reduced, and the technical problem that the vehicle body model has errors when the existing simulation analysis vehicle body mode exists is solved.
Referring to fig. 8, fig. 8 is a schematic flow chart of a simulation modeling method for an automobile damping plate according to a second embodiment of the present invention. Based on the first embodiment, in the step S30, the simulation modeling method for the automobile damping plate of the embodiment includes:
step S301: and determining the size and the type of the preset grid according to a preset finite element analysis algorithm.
It should be noted that the damping plate target surface is discretized into a plurality of surface units according to a preset finite element analysis algorithm, that is, finite element meshing is performed, and before finite element meshing is performed, meshing pre-processing work needs to be performed, so that preparation work is prepared for finite element meshing.
Specifically, the pre-meshing processing work may include: determining a preset set model according to the damping plate target surface, and importing the preset set model into a preset finite element analysis model; determining node information, side information and surface information of the preset set model through a preset finite element analysis model; judging whether the node information, the side information and the plane information meet preset quality information or not; and when the node information, the side information and the surface information meet the preset quality information, a step of dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm is performed.
It is easy to understand that the pre-meshing processing work is to introduce a preset set model determined by a damping plate target surface into a preset finite element analysis model before the finite element mesh is divided, the preset finite element analysis model may be finite element analysis software, which is not limited in this embodiment, and then determine whether the preset set model in the finite element analysis software has missing information such as edges, faces, and the like, and determine whether the node information, the edge information, and the face information satisfy preset quality information, the preset quality information may be set according to the meshing quality, when the preset quality information is not satisfied, the nodes, the edges, the faces, and the like affecting the meshing quality are deleted, and the preparation work is prepared for the finite element meshing.
Specifically, a preset mesh size and a preset mesh type are determined, the preset mesh size is a predefined divided mesh size, the preset mesh type is a predefined mesh type, and the defined mesh type may be a triangle, a quadrangle, or a mixed mesh type.
Step S302: and carrying out finite element meshing on the target surface of the damping plate according to the size of the preset mesh and the type of the preset mesh so as to obtain a plurality of discrete surface units.
It should be noted that the finite element meshing process may include: determining the size and the type of a preset grid according to a preset finite element analysis algorithm; and carrying out finite element meshing on the target surface of the damping plate according to the size of the preset mesh and the type of the preset mesh so as to obtain a plurality of discrete surface units.
Specifically, the preset mesh size is a predefined divided mesh size, the preset mesh type is a predefined mesh type, the defined mesh type can be a triangle, a quadrangle or a mixed mesh type, and the like, and finite element meshing is performed on the target surface of the damping plate in finite element analysis software, so that the damping plate is dispersed into a plurality of surface units.
Step S303: obtaining a preset component, a preset material type and a preset thickness.
It is easily understood that the process of constructing a three-dimensional volume unit from the face units may include: acquiring a preset component, a preset material type and a preset thickness; stretching the surface unit according to the preset assembly to obtain an initial three-dimensional body unit; and carrying out parameter setting on the three-dimensional unit according to the preset material type and the preset thickness so as to obtain the three-dimensional unit.
Specifically, the preset material type and the preset thickness can be input into the thickness and the material type of the damping plate through a design file or a common specification, the preset material type and the preset thickness can be adjusted through a modal and stiffness calculation result in the modal and stiffness calculation process through a target damping plate simulation model, and then the thickness and the material of the damping plate are determined.
Step S304: and stretching the face unit according to the preset assembly to obtain an initial three-dimensional body unit.
It should be noted that, a component may be newly built in the finite element analysis software, that is, a preset component is obtained, the discrete multiple surface sheets are stretched to obtain the three-dimensional body unit, and the stretching is performed according to the preset material type and the preset thickness.
Step S305: and carrying out parameter setting on the three-dimensional unit according to the preset material type and the preset thickness so as to obtain the three-dimensional unit.
Specifically, a component can be newly built in the finite element analysis software, that is, a preset component is obtained, the plurality of discrete surface sheets are stretched to obtain a three-dimensional body unit, and the three-dimensional body unit is stretched according to a preset material type and a preset thickness, wherein the thickness of the stretched three-dimensional body unit is equal to the thickness of the damping plate. The thickness of the damping plate may be obtained by a design file or a physical measurement, or may be obtained by other methods, which is not limited in this embodiment. The shape, the contour and the thickness of the damping plate are repeatedly engraved into the three-dimensional unit, and the three-dimensional unit is high in precision and small in error.
The method comprises the steps of determining the size and the type of a preset grid according to a preset finite element analysis algorithm; carrying out finite element meshing on the damping plate target surface according to the size of the preset mesh and the type of the preset mesh to obtain a plurality of discrete surface units; acquiring a preset component, a preset material type and a preset thickness; stretching the surface unit according to the preset assembly to obtain an initial three-dimensional body unit; and carrying out parameter setting on the three-dimensional unit according to the preset material type and the preset thickness so as to obtain the three-dimensional unit. Compared with the existing rough damping plate model, the real shape, thickness and attributes of the damping plate such as the boundary line and the wire frame of the damping plate are fully considered, the target damping plate simulation model obtained by utilizing the preset finite element analysis algorithm and the preset unit node fusion algorithm is more real and credible, the boundary and the thickness of the damping plate can be truly reflected, and the error is smaller. Meanwhile, the simulation precision and the reliability of the vehicle body model with the damping plate structure are improved, the error of simulation vehicle body analysis is reduced, and the technical problem that the vehicle body model has errors when the existing simulation analysis vehicle body mode exists is solved.
In addition, an embodiment of the present invention further provides a storage medium, where an automobile damping plate simulation modeling program is stored on the storage medium, and the automobile damping plate simulation modeling program is executed by a processor to perform the steps of the automobile damping plate simulation modeling method described above.
Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
Referring to fig. 9, fig. 9 is a structural block diagram of a first embodiment of the simulation modeling apparatus for an automobile damping plate of the present invention.
As shown in fig. 9, the simulation modeling apparatus for an automobile damping plate in the embodiment of the present invention includes:
the acquiring module 10 is configured to acquire an image of a damping plate of an automobile, and determine a boundary line of the damping plate according to the image of the damping plate.
It should be noted that, in order to establish a real and appropriate damping plate finite element model in the simulation model of the automobile, to obtain a target damping plate simulation model, an actual damping plate image of the automobile needs to be obtained.
It will be readily appreciated that the process of determining the damper plate edge lines from the actual damper plate image may include: determining an initial damping plate profile according to the damping plate image; determining an initial boundary node corresponding to the initial damping plate profile according to a preset node distribution algorithm; projecting the initial boundary node to a preset damping plate binding surface to obtain a target boundary node; and determining a damping plate boundary line according to the target boundary node.
Specifically, at present, plastic parts such as a damping plate and an epoxy reinforcing plate are often required to be attached to a metal plate of a vehicle body and a metal plate of a door cover system of an automobile, and particularly, the plastic parts mainly play roles in vibration damping and sound insulation on a floor, a front panel, a rear wheel cover, a side wall outer plate and a vehicle door outer plate. Referring to fig. 3, fig. 3 is a schematic diagram of a damping plate attached to a floor of a vehicle body in this embodiment, an initial damping plate profile may be determined according to a damping plate image corresponding to the damping plate attached to the floor of the vehicle body, an initial boundary node of the initial damping plate profile is selected on the damping plate image, the initial boundary node is a point indicated by a 1-a 7 in fig. 3, the initial boundary node is projected onto a bonding surface of a preset damping plate, and the bonding surface of the preset damping plate is a bonding surface (floor) of the damping plate; and projecting to obtain target boundary nodes, connecting the target boundary nodes by using lines to obtain a closed line which is almost completely consistent with the original shape of the damping plate, namely a damping plate edge boundary line, referring to fig. 4, wherein fig. 4 is a schematic diagram of the damping plate edge boundary line and a damping plate frame in the embodiment, and the damping plate edge boundary line is shown by a dotted line in fig. 4.
And the generating module 20 is configured to generate a damping plate wire frame according to the damping plate boundary line, and determine a damping plate target surface according to the damping plate wire frame.
It should be appreciated that the process of generating a damping plate wire frame from the damping plate boundary lines and determining a damping plate target surface from the damping plate wire frame may include: generating a damping plate wire frame according to the damping plate boundary line; acquiring a binding surface of a preset damping plate; and cutting the preset damping plate binding surface according to the damping plate wire frame to obtain a damping plate target surface, wherein the damping plate target surface is the upper surface of the preset damping plate binding surface.
Specifically, the target boundary nodes are connected by lines to obtain a closed line which is almost completely consistent with the original shape of the damping plate, namely a damping plate boundary line, a damping plate wire frame is generated according to the damping plate boundary line, and the damping plate boundary line is connected into a closed wire frame which is almost completely consistent with the original shape of the damping plate, namely the damping plate wire frame.
It is easy to understand that, with continued reference to fig. 4, the preset damping plate attachment surface may be segmented by a damping plate wire frame, which is a dashed line frame formed by dashed lines in fig. 4, to obtain a damping plate target surface on the attachment surface of the damping plate. The preset damping plate binding surface is a binding surface of a binding surface (floor) of the damping plate, namely the binding surface of the damping plate, the damping plate target surface is a surface in a pink wire frame, the damping plate target surface is almost completely consistent with the original outer contour of the damping plate, the size and the shape of ribs and holes after the damping plate is bound are reserved, and the damping plate target surface is a part of the upper surface of the floor.
The discretization module 30 is configured to discretize the damping plate target surface into a plurality of surface units according to a preset finite element analysis algorithm, and construct a three-dimensional body unit according to the surface units.
It should be noted that the damping plate target surface is discretized into a plurality of surface units according to a preset finite element analysis algorithm, that is, finite element meshing is performed, and before finite element meshing is performed, meshing pre-processing work needs to be performed, so that preparation work is prepared for finite element meshing.
Specifically, the pre-meshing processing work may include: determining a preset set model according to the damping plate target surface, and importing the preset set model into a preset finite element analysis model; determining node information, side information and surface information of the preset set model through a preset finite element analysis model; judging whether the node information, the side information and the plane information meet preset quality information or not; and when the node information, the side information and the surface information meet the preset quality information, a step of dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm is performed.
It is easy to understand that the pre-meshing processing work is to introduce a preset set model determined by a damping plate target surface into a preset finite element analysis model before the finite element mesh is divided, the preset finite element analysis model may be finite element analysis software, which is not limited in this embodiment, and then determine whether the preset set model in the finite element analysis software has missing information such as edges, faces, and the like, and determine whether the node information, the edge information, and the face information satisfy preset quality information, the preset quality information may be set according to the meshing quality, when the preset quality information is not satisfied, the nodes, the edges, the faces, and the like affecting the meshing quality are deleted, and the preparation work is prepared for the finite element meshing.
It should be noted that the finite element meshing process may include: determining the size and the type of a preset grid according to a preset finite element analysis algorithm; and carrying out finite element meshing on the target surface of the damping plate according to the size of the preset mesh and the type of the preset mesh so as to obtain a plurality of discrete surface units. Specifically, a preset mesh size and a preset mesh type are determined, the preset mesh size is a predefined divided mesh size, the preset mesh type is a predefined mesh type, and the defined mesh type may be a triangle, a quadrangle, or a mixed mesh type, and the like, referring to fig. 5, fig. 5 is a schematic diagram of discrete surface units in this embodiment, and finite element mesh division is implemented on a target surface of a damping plate in finite element analysis software, and the target surface is discrete into a plurality of surface units.
It is easily understood that the process of constructing a three-dimensional volume unit from the face units may include: acquiring a preset component, a preset material type and a preset thickness; stretching the surface unit according to the preset assembly to obtain an initial three-dimensional body unit; and performing parameter setting on the three-dimensional body unit according to the preset material type and the preset thickness to obtain the three-dimensional body unit, referring to fig. 6, where fig. 6 is a schematic diagram of the three-dimensional body unit in this embodiment.
Specifically, a component can be newly built in the finite element analysis software, that is, a preset component is obtained, the plurality of discrete surface sheets are stretched to obtain a three-dimensional body unit, and the three-dimensional body unit is stretched according to a preset material type and a preset thickness, wherein the thickness of the stretched three-dimensional body unit is equal to the thickness of the damping plate. The thickness of the damping plate may be obtained by a design file or a physical measurement, or may be obtained by other methods, which is not limited in this embodiment. The shape, the contour and the thickness of the damping plate are repeatedly engraved into the three-dimensional unit, and the three-dimensional unit is high in precision and small in error.
And the fusion module 40 is used for modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model.
It should be understood that the process of modeling the three-dimensional body unit according to the preset unit node fusion algorithm to obtain the target damping plate simulation model may include: obtaining the bottom surface of the three-dimensional body unit, and determining a bottom surface node corresponding to the bottom surface; acquiring a target surface node corresponding to the target surface of the damping plate; determining a preset fusion radius according to a preset unit node fusion algorithm; and combining the bottom surface node and the target surface node within the preset fusion radius to obtain a target damping plate simulation model. Wherein, the preset fusion radius may be a predefined fusion radius.
Specifically, modeling the three-dimensional body unit according to a preset unit node fusion algorithm is realized through finite element analysis software, a certain amount of nodes are selected in the finite element analysis software, the nodes comprise bottom surface nodes corresponding to the bottom surface of the three-dimensional body unit and target surface nodes corresponding to the target surface of the damping plate, and a fusion radius is set, namely, all the nodes in the fusion radius can be fused into one point by one key.
It should be noted that, referring to fig. 7, fig. 7 is a schematic diagram illustrating cell node fusion of a three-dimensional volume unit in this embodiment. And combining a bottom surface node corresponding to the bottom surface of the three-dimensional body unit with a target surface node corresponding to the target surface of the damping plate, wherein the bottom surface of the three-dimensional body unit is a surface coincident with the target surface. And modeling the pasting behavior of the damping plate in a unit node fusion mode. Corresponding materials and properties are set for the component in which the three-dimensional volume unit is located. Other components also need to be modeled according to preset definitions. And the finally obtained target damping plate simulation model can be used for modal analysis. Because the target damping plate simulation model is a model added with the real shape, thickness, attribute and the like of the damping plate, the damping plate is considered when the model, the rigidity and the rigidity of the local mounting point of the vehicle body are simulated and analyzed, the error of modal analysis is reduced, and the accuracy of calculating the rigidity, particularly the local rigidity is improved.
In this embodiment, the simulation modeling device for the automobile damping plate includes: the acquiring module 10 is used for acquiring an image of a damping plate of an automobile and determining a boundary line of the damping plate according to the image of the damping plate; the generating module 20 is configured to generate a damping plate wire frame according to the damping plate boundary line, and determine a damping plate target surface according to the damping plate wire frame; the discretization module 30 is used for discretizing the damping plate target surface into a plurality of surface units according to a preset finite element analysis algorithm, and constructing a three-dimensional body unit according to the surface units; and the fusion module 40 is used for modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model. Compared with the existing rough damping plate model, the real shape, thickness and attributes of the damping plate such as the boundary line and the wire frame of the damping plate are fully considered, the target damping plate simulation model obtained by utilizing the preset finite element analysis algorithm and the preset unit node fusion algorithm is more real and credible, the boundary and the thickness of the damping plate can be truly reflected, and the error is smaller. Meanwhile, the simulation precision and the reliability of the vehicle body model with the damping plate structure are improved, the error of simulation vehicle body analysis is reduced, and the technical problem that the vehicle body model has errors when the existing simulation analysis vehicle body mode exists is solved.
In an embodiment, the obtaining module 10 is further configured to obtain a damping plate image of an automobile, and determine an initial damping plate profile according to the damping plate image;
determining an initial boundary node corresponding to the initial damping plate profile according to a preset node distribution algorithm;
projecting the initial boundary node to a preset damping plate binding surface to obtain a target boundary node;
and determining a damping plate boundary line according to the target boundary node.
In an embodiment, the generating module 20 is further configured to generate a damping plate wire frame according to the damping plate boundary line;
acquiring a binding surface of a preset damping plate;
and cutting the preset damping plate binding surface according to the damping plate wire frame to obtain a damping plate target surface, wherein the damping plate target surface is the upper surface of the preset damping plate binding surface.
In one embodiment, the simulation modeling apparatus for an automobile damping plate further includes: the system comprises a pre-processing module, a finite element analysis module and a control module, wherein the pre-processing module is used for determining a preset set model according to a target surface of the damping plate and importing the preset set model into a preset finite element analysis model;
determining node information, side information and surface information of the preset set model through a preset finite element analysis model;
judging whether the node information, the side information and the plane information meet preset quality information or not;
and when the node information, the side information and the surface information meet the preset quality information, a step of dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm is performed.
In an embodiment, the discrete module 30 is further configured to determine a preset mesh size and a preset mesh type according to a preset finite element analysis algorithm;
and carrying out finite element meshing on the target surface of the damping plate according to the size of the preset mesh and the type of the preset mesh so as to obtain a plurality of discrete surface units.
In an embodiment, the discrete module 30 is further configured to obtain a preset component, a preset material type, and a preset thickness;
stretching the surface unit according to the preset assembly to obtain an initial three-dimensional body unit;
and carrying out parameter setting on the three-dimensional unit according to the preset material type and the preset thickness so as to obtain the three-dimensional unit.
In an embodiment, the fusion module 40 is further configured to obtain a bottom surface of the three-dimensional body unit, and determine a bottom surface node corresponding to the bottom surface;
acquiring a target surface node corresponding to the target surface of the damping plate;
determining a preset fusion radius according to a preset unit node fusion algorithm;
and combining the bottom surface node and the target surface node within the preset fusion radius to obtain a target damping plate simulation model.
Other embodiments or specific implementation manners of the simulation modeling device for the automobile damping plate can refer to the above embodiments of the simulation modeling method for the automobile damping plate, and are not described herein again.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment may refer to the simulation modeling method for the automobile damping plate provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The automobile damping plate simulation modeling method is characterized by comprising the following steps:
acquiring an image of a damping plate of an automobile, and determining a boundary line of the damping plate according to the image of the damping plate;
generating a damping plate wire frame according to the damping plate boundary line, and determining a damping plate target surface according to the damping plate wire frame;
dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm, and constructing a three-dimensional body unit according to the surface units;
and modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model.
2. The method for modeling an automobile damping plate according to claim 1, wherein the step of obtaining an image of the automobile damping plate and determining the boundary line of the damping plate according to the image of the damping plate comprises:
acquiring an image of a damping plate of an automobile, and determining an initial damping plate outline according to the image of the damping plate;
determining an initial boundary node corresponding to the initial damping plate profile according to a preset node distribution algorithm;
projecting the initial boundary node to a preset damping plate binding surface to obtain a target boundary node;
and determining a damping plate boundary line according to the target boundary node.
3. The simulation modeling method for the automobile damping plate according to claim 1, wherein the step of generating a damping plate wire frame according to the damping plate boundary line and determining a damping plate target surface according to the damping plate wire frame comprises the following steps:
generating a damping plate wire frame according to the damping plate boundary line;
acquiring a binding surface of a preset damping plate;
and cutting the preset damping plate binding surface according to the damping plate wire frame to obtain a damping plate target surface, wherein the damping plate target surface is the upper surface of the preset damping plate binding surface.
4. The method for modeling an automobile damping plate according to the simulation of the damping plate of claim 1, wherein before the step of discretizing the target surface of the damping plate into a plurality of surface elements according to the predetermined finite element analysis algorithm, the method further comprises:
determining a preset set model according to the damping plate target surface, and importing the preset set model into a preset finite element analysis model;
determining node information, side information and surface information of the preset set model through a preset finite element analysis model;
judging whether the node information, the side information and the plane information meet preset quality information or not;
and when the node information, the side information and the surface information meet the preset quality information, a step of dispersing the target surface of the damping plate into a plurality of surface units according to a preset finite element analysis algorithm is performed.
5. The simulation modeling method for the automobile damping plate according to any one of claims 1 to 4, wherein the step of discretizing the damping plate target surface into a plurality of surface units according to a preset finite element analysis algorithm comprises:
determining the size and the type of a preset grid according to a preset finite element analysis algorithm;
and carrying out finite element meshing on the target surface of the damping plate according to the size of the preset mesh and the type of the preset mesh so as to obtain a plurality of discrete surface units.
6. The automobile damping plate simulation modeling method of any one of claims 1 to 4, wherein the step of constructing a three-dimensional volume unit from the face units comprises:
acquiring a preset component, a preset material type and a preset thickness;
stretching the surface unit according to the preset assembly to obtain an initial three-dimensional body unit;
and carrying out parameter setting on the three-dimensional unit according to the preset material type and the preset thickness so as to obtain the three-dimensional unit.
7. The automobile damping plate simulation modeling method according to any one of claims 1 to 4, wherein the step of modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model comprises the steps of:
obtaining the bottom surface of the three-dimensional body unit, and determining a bottom surface node corresponding to the bottom surface;
acquiring a target surface node corresponding to the target surface of the damping plate;
determining a preset fusion radius according to a preset unit node fusion algorithm;
and combining the bottom surface node and the target surface node within the preset fusion radius to obtain a target damping plate simulation model.
8. The automobile damping plate simulation modeling device is characterized by comprising the following components:
the acquisition module is used for acquiring an image of a damping plate of an automobile and determining a boundary line of the damping plate according to the image of the damping plate;
the generating module is used for generating a damping plate wire frame according to the damping plate boundary line and determining a damping plate target surface according to the damping plate wire frame;
the dispersion module is used for dispersing the damping plate target surface into a plurality of surface units according to a preset finite element analysis algorithm and constructing a three-dimensional body unit according to the surface units;
and the fusion module is used for modeling the three-dimensional body unit according to a preset unit node fusion algorithm to obtain a target damping plate simulation model.
9. The automobile damping plate simulation modeling device is characterized by comprising: a memory, a processor and an automotive damping plate simulation modeling program stored on the memory and executable on the processor, the automotive damping plate simulation modeling program configured to implement the steps of the automotive damping plate simulation modeling method of any one of claims 1 to 7.
10. A storage medium, characterized in that the storage medium stores thereon a simulation modeling program of an automobile damping plate, and the simulation modeling program of the automobile damping plate, when executed by a processor, realizes the steps of the simulation modeling method of the automobile damping plate according to any one of claims 1 to 7.
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Application publication date: 20210716 |