CN112199783B - Frame finite element simulation method, device, equipment and storage medium - Google Patents
Frame finite element simulation method, device, equipment and storage medium Download PDFInfo
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Abstract
The invention belongs to the technical field of vehicle design, and discloses a frame finite element simulation method, device, equipment and storage medium. The method comprises the following steps: acquiring a three-dimensional model of a frame to be simulated; converting the three-dimensional model into a two-dimensional shell unit structure model; carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model; rivet connection optimization treatment is carried out on the gridding two-dimensional model, and a target two-dimensional model is obtained; performing welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated; and carrying out the stress verification of the vehicle frame according to the finite element simulation model. Through the mode, the three-dimensional model is converted into the two-dimensional model, the two-dimensional model is simpler in grid division compared with the three-dimensional model, the number of grids is smaller, the scale of the frame finite element model is effectively reduced, the rivet connection is optimized, the welding connection is simplified, and the efficiency of finite element analysis is improved.
Description
Technical Field
The invention relates to the technical field of automobile design, in particular to a frame finite element simulation method, device and equipment and a storage medium.
Background
With the progress of science and technology, the automobile industry is rapidly developing, and automobiles occupy more and more important positions in people's lives. As part of an automotive assembly, the frame is subjected to loads from roads and complex loads. The frame is provided with the relevant parts such as an engine, a transmission system, a suspension, a container and the like, bears various forces and moments transmitted to the frame, and has a complex working state. The frame is therefore sufficiently rigid and strong and reliable and has a long life. The method for finding the optimal design frame is very important, so that the design period of the automobile can be shortened, and the reliability of the safety performance of the automobile can be improved.
The most common use in the current frame design is the test: according to classical mechanics theory, a great deal of simplified calculation is carried out on the frame, the frame is designed by depending on experience of a designer, a sample car is manufactured in a trial mode after the scheme is finished, and the sample car is tested to judge whether the design is reasonable or not. The method has certain reliability, but the design is blind, and the development period of the automobile is longer. The finite element method is not generally applied, when a finite element model of a vehicle frame is made in the prior art, the grid quality is poor, the workload can be increased, the scale of the finite element model can be increased, the stress concentration at the periphery of a rivet can be increased, and the judgment of the overall strength of the vehicle frame is affected.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a frame finite element simulation method, device, equipment and storage medium, which aim at solving the technical problems of reducing the scale of a frame finite element model and improving the finite element analysis efficiency.
In order to achieve the above object, the present invention provides a frame finite element simulation method, which includes the following steps:
acquiring a three-dimensional model of a frame to be simulated;
converting the three-dimensional model into a two-dimensional shell element structure model;
carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model;
performing rivet connection optimization treatment on the meshed two-dimensional model to obtain a target two-dimensional model;
performing welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated;
and carrying out the stress verification of the vehicle frame according to the finite element simulation model.
Optionally, the performing gridding processing on the two-dimensional shell unit structural model to obtain a gridded two-dimensional model includes:
performing independent grid division treatment on the target holes corresponding to the two-dimensional shell unit structure model to obtain a hole part grid model;
performing grid division on the model except for the target hole in the two-dimensional shell unit structure model to obtain a partial grid model;
and obtaining a grid two-dimensional model according to the hole grid model and the partial grid model.
Optionally, the performing separate meshing processing on the target hole corresponding to the two-dimensional shell unit structural model includes:
adding a stamping surface on the periphery of the target hole according to the pressing surface of the rivet to obtain a target hole with the stamping surface;
and performing independent grid division processing on the target hole carrying the imprinting surface.
Optionally, the rivet connection optimization processing is performed on the gridding two-dimensional model to obtain a target two-dimensional model, which includes:
and converting the rivet connection unit in the gridding two-dimensional model into a beam structure unit with the same section as the rivet to obtain the target two-dimensional model.
Optionally, the converting the rivet connection unit in the gridding two-dimensional model into a beam structure unit with the same section as the rivet to obtain the target two-dimensional model includes:
acquiring rivet connection unit information in the gridding two-dimensional model;
determining rivet section information and rivet connected shell units according to the rivet connection unit information;
determining a remote point of action from the rivet-connected shell elements;
selecting a beam unit structure, wherein the section information corresponding to the beam unit structure is the same as the rivet section information;
and connecting the remote action points through the beam unit structure to obtain a target two-dimensional model.
Optionally, the determining a remote action point from the rivet-connected shell element includes:
determining a stamping surface corresponding to the rivet connection hole according to the shell units connected by the rivet;
and simulating the associated remote action point according to the imprinting surface.
Optionally, the performing a welding connection simplification process on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated includes:
determining the position of a welding line in the target two-dimensional model and a part to be welded;
and connecting the parts to be welded in the welding seam position in a binding contact mode to obtain a finite element simulation model of the frame to be simulated.
In addition, in order to achieve the above object, the present invention also provides a frame finite element simulation device, which includes:
the acquisition module is used for acquiring a three-dimensional model of the frame to be simulated;
the conversion module is used for converting the three-dimensional model into a two-dimensional shell unit structure model;
the gridding module is used for carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model;
the optimization module is used for carrying out rivet connection optimization treatment on the gridding two-dimensional model to obtain a target two-dimensional model
The simplification module is used for carrying out welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated;
and the verification module is used for verifying the stress of the frame according to the finite element simulation model.
In addition, in order to achieve the above object, the present invention also proposes a frame finite element simulation apparatus, including: a memory, a processor, and a carriage finite element simulation program stored on the memory and executable on the processor, the carriage finite element simulation program configured to implement the steps of the carriage finite element simulation method as described above.
In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a carriage finite element simulation program which, when executed by a processor, implements the steps of the carriage finite element simulation method as described above.
The method comprises the steps of obtaining a three-dimensional model of a frame to be simulated; converting the three-dimensional model into a two-dimensional shell unit structure model; carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model; rivet connection optimization treatment is carried out on the gridding two-dimensional model, and a target two-dimensional model is obtained; performing welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated; and carrying out the stress verification of the vehicle frame according to the finite element simulation model. Through the mode, the three-dimensional model is converted into the two-dimensional model, the two-dimensional model is simpler in grid division compared with the three-dimensional model, the number of grids is smaller, the scale of the frame finite element model is effectively reduced, the rivet connection is optimized, the welding connection is simplified, and the efficiency of finite element analysis is improved.
Drawings
FIG. 1 is a schematic diagram of a frame finite element simulation device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a frame finite element simulation method according to the present invention;
FIG. 3 is a schematic diagram of a three-dimensional model of a vehicle frame according to an embodiment of the present invention;
FIG. 4 is a schematic diagram showing a comparison of a three-dimensional model of a vehicle frame and a two-dimensional shell unit structure model according to an embodiment of the present invention;
FIG. 5 is a flow chart of a second embodiment of a frame finite element simulation method according to the present invention;
FIG. 6 is a grid contrast diagram of an embodiment of a frame finite element simulation method of the present invention;
FIG. 7 is a flow chart of a third embodiment of a frame finite element simulation method according to the present invention;
FIG. 8 is a schematic diagram showing a comparison of rivet connection units and beam structure units according to an embodiment of the frame finite element simulation method of the present invention;
FIG. 9 is a flow chart of a fourth embodiment of a frame finite element simulation method according to the present invention;
FIG. 10 is a block diagram of a first embodiment of a finite element simulation apparatus for a vehicle frame according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a frame finite element simulation device of a hardware running environment according to an embodiment of the present invention.
As shown in fig. 1, the frame finite element simulation apparatus may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further 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 high-speed random access Memory (Random Access Memory, RAM) Memory or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 is not limiting of the frame finite element simulation apparatus and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a carriage finite element simulation program may be included in the memory 1005 as one type of storage medium.
In the frame finite element simulation apparatus 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 in the frame finite element simulation device can be arranged in the frame finite element simulation device, and the frame finite element simulation device calls the frame finite element simulation program stored in the memory 1005 through the processor 1001 and executes the frame finite element simulation method provided by the embodiment of the invention.
The embodiment of the invention provides a frame finite element simulation method, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the frame finite element simulation method.
In this embodiment, the frame finite element simulation method includes the following steps:
step S10: and obtaining a three-dimensional model of the frame to be simulated.
It may be understood that the execution body of the present embodiment is a frame finite element simulation device, which may be a computer or a server installed with a frame finite element simulation program, or may be other devices capable of implementing the same function, which is not limited in this embodiment.
Referring to fig. 3, fig. 3 is a schematic diagram of a three-dimensional model of a vehicle frame according to an embodiment of the present invention, and the vehicle frame assembly is symmetric left and right, wherein main components include a longitudinal beam 1, a cross beam 2, a cross beam connecting plate 3 and a vehicle body connecting plate 4; the parts are riveted and welded. Modeling the frame assembly by software such as UG (Unigraphics), solidWorks, CATIA and Pro/E resulted in the geometric model shown in FIG. 3.
It should be noted that, the process of obtaining the three-dimensional model of the frame to be simulated may be that the frame assembly is modeled in advance by modeling software, a file with a general format is output and sent to the frame finite element simulation device, and the frame finite element simulation device reads the file with the general format to obtain the three-dimensional model of the frame to be simulated.
Step S20: and converting the three-dimensional model into a two-dimensional shell element structure model.
It can be understood that the three-dimensional model is imported into finite element analysis software, and is converted into a two-dimensional shell element structure model, the shell element is given according to actual thickness, the finite element analysis software can be ANSA Workbench or HypermeSh, and the user can display the three-dimensional structure by displaying the thickness to the two-dimensional shell element structure model.
Referring to fig. 4, fig. 4 is a schematic diagram of a frame three-dimensional model and a two-dimensional shell unit structure model in comparison with the three-dimensional model, in which the two-dimensional shell unit structure model has a simpler structure and a simpler gridding process according to an embodiment of the frame finite element simulation method.
Step S30: and carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model.
In this embodiment, the gridding processing may be implemented by processing modes such as free gridding, mapping gridding, and mixed gridding, or the holes connected by rivets and other important holes may be divided separately, and then the rest of the holes are gridded, so that the gridding processing is performed on the two-dimensional shell unit structural model, and a gridded two-dimensional model is obtained.
It will be appreciated that the step of implementing the gridding process by free meshing may include: the intelligent size control technology of ANSYS finite element analysis software is utilized to automatically control the size and the density distribution of the grid, and preset parameters can be input to realize the control of the size of the grid, the control of the density distribution, the selection of a grid dividing algorithm and the like. The step of implementing the gridding process by mapping meshing may include: and cutting the model into a series of hexahedrons by utilizing an ANSYS Boolean operation function, and then carrying out mapping grid division on the cut cubes. The step of implementing the gridding process by hybrid meshing may include: according to the specific of the longitudinal beam, the cross beam connecting plate and the vehicle body connecting plate, various grid division modes such as free, mapping, sweeping and the like are adopted respectively, so that a finite element model with the best comprehensive effect is formed. In order to improve the calculation accuracy and reduce the calculation time, firstly, a hexahedral mesh is firstly divided for a region suitable for scanning and mapping mesh division, and the hexahedral unit with nodes in the region which is actually unable to be segmented any more and is divided by a tetrahedral free mesh is adopted for free mesh division.
Step S40: and carrying out rivet connection optimization treatment on the gridding two-dimensional model to obtain a target two-dimensional model.
The rivet connection optimizing process may include optimizing the rivet connection in a connection manner such as a simulation bolt and spot welding, or may include replacing the rivet connection with a beam unit, thereby obtaining the target two-dimensional model.
Step S50: and performing welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated.
It will be appreciated that the parts are joined by means of binding contacts at the weld locations of the two parts, thereby allowing for a simplified handling of the welded connection.
Step S60: and carrying out the stress verification of the vehicle frame according to the finite element simulation model.
The method is characterized in that the stress condition of the frame can be verified by inputting stress condition parameters into the finite element simulation model according to actual conditions, and a powerful verification means is provided for vehicle development.
The three-dimensional model of the frame to be simulated is obtained; converting the three-dimensional model into a two-dimensional shell unit structure model; carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model; rivet connection optimization treatment is carried out on the gridding two-dimensional model, and a target two-dimensional model is obtained; performing welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated; and carrying out the stress verification of the vehicle frame according to the finite element simulation model. Through the mode, the three-dimensional model is converted into the two-dimensional model, the two-dimensional model is simpler in grid division compared with the three-dimensional model, the number of grids is smaller, the scale of the frame finite element model is effectively reduced, the rivet connection is optimized, the welding connection is simplified, and the efficiency of finite element analysis is improved.
Referring to fig. 5, fig. 5 is a schematic flow chart of a second embodiment of a frame finite element simulation method according to the present invention.
Based on the above first embodiment, the frame finite element simulation method of the present embodiment in step S30 includes:
step S301: and performing independent grid division treatment on the target holes corresponding to the two-dimensional shell unit structure model to obtain a hole part grid model.
It can be understood that the individual meshing process may be a series of trilateral, quadrilateral or hexagonal shapes at the dividing position of the periphery of the target hole, or may be performed by adding the stamping surface to the target hole according to the rivet pressing surface and then performing the individual meshing process to the stamping surface.
Further, in order to perform separate dividing processing on the target hole, so that the stress result of the periphery of the simulated rivet hole is more accurate, the performing separate grid dividing processing on the target hole corresponding to the two-dimensional shell unit structure model includes: adding a stamping surface on the periphery of the target hole according to the pressing surface of the rivet to obtain a target hole with the stamping surface; and performing independent grid division processing on the target hole carrying the imprinting surface.
It will be appreciated that the stamping surface refers to a region that is separated from a large plane, and in this embodiment, the stamping surface is the same shape and size as the pressing surface of the rivet.
Step S302: and performing grid division processing on the model except the target hole in the two-dimensional shell unit structure model to obtain a partial grid model.
It can be appreciated that the intelligent size control technology of ANSYS finite element analysis software is utilized to automatically control the size and density distribution of the grids, so that the operation of performing grid division processing on the model except the target hole is completed.
Step S303: and obtaining a grid two-dimensional model according to the hole grid model and the partial grid model.
Referring to fig. 6, fig. 6 is a grid comparison diagram of an embodiment of a frame finite element simulation method according to the present invention, which is a corner grid comparison diagram of a first cross beam of a frame, wherein a geometric model 1 is a geometric model corresponding to a current finite element analysis model when a print surface is not added in the current finite element analysis model, a geometric model 1 is a grid diagram of the current finite element analysis model, a geometric model 2 is a geometric model obtained by adding the print surface to the periphery of a target hole according to a compression surface of a rivet in the present embodiment, and a finite element model 2 is a finite element model obtained by meshing the present embodiment, and it can be seen from the figure that the meshing two-dimensional model obtained by meshing processing in the present embodiment has better interpretation for simulation of the periphery of the rivet than the finite element model 1, and can obtain a more accurate stress result of the periphery of the rivet in subsequent stress verification.
According to the embodiment, the stamping surface is added to the periphery of the rivet connection hole and other important holes according to the pressing surface of the rivet, and after the stamping surface is singly subjected to grid division, other parts are subjected to grid division, so that the grid quality of the periphery of the rivet is improved, a model with better interpretation is provided for the stress analysis of the periphery of the rivet, and the efficiency of finite element analysis is improved.
Referring to fig. 7, fig. 7 is a schematic flow chart of a third embodiment of a frame finite element simulation method according to the present invention.
Based on the above first embodiment, the frame finite element simulation method of the present embodiment in step S40 includes:
step S401: and converting the rivet connection unit in the gridding two-dimensional model into a beam structure unit with the same section as the rivet to obtain the target two-dimensional model.
Referring to fig. 8, fig. 8 is a schematic diagram showing a comparison between a rivet connection unit and a beam structure unit according to an embodiment of the frame finite element simulation method of the present invention, where the rivet is used to connect an upper unit cell and a lower unit cell, and the beam structure unit is used to connect an upper shell cell and a lower shell cell, and the cross sections of the beam structure unit and the rivet connection unit are the same, so as to implement rivet connection optimization processing.
Further, in order to convert the rivet connection unit into a beam structural unit with the same section as the rivet, an optimized target two-dimensional model is obtained, the step S401 includes: acquiring rivet connection unit information in the gridding two-dimensional model; determining rivet section information and rivet connected shell units according to the rivet connection unit information; determining a remote point of action from the rivet-connected shell elements; selecting a beam unit structure, wherein the section information corresponding to the beam unit structure is the same as the rivet section information; and connecting the remote action points through the beam unit structure to obtain a target two-dimensional model.
It can be understood that the rivet section information is obtained through the parameter information corresponding to the three-dimensional model. In finite element analysis, stress concentration is easily caused at stress points when a concentrated load such as point load is applied to a structure, so that a simulation result is inaccurate, and a remote acting point acts to transfer the concentrated load to elements such as lines and surfaces in the result, so that the stress concentration is reduced, and the simulation precision is improved. The location of the remote point of application may be determined by rivets or by beam unit structure.
Further, in order to improve simulation accuracy, determine a remote action point and a transmitted surface, so that a force verification result is more accurate, the determining the remote action point according to the rivet-connected shell unit includes: determining a stamping surface corresponding to the rivet connection hole according to the shell units connected by the rivet; and simulating the associated remote action point according to the imprinting surface.
It will be appreciated that before determining the corresponding footprint of the rivet connection holes from the rivet connected shell elements, the method further comprises: and stamping surfaces are added on the shell units connected by the rivets according to the pressing surfaces of the rivets at the periphery of the rivet holes, and the remote acting points are determined according to the stamping surfaces, so that concentrated stress is transmitted to the stamping surfaces in the subsequent stress verification process, and the optimal simulation of the rivets is realized.
According to the embodiment, the beam unit structure is combined with the imprinting surface and the remote action point to replace a rivet connected model, so that the scale of the frame finite element model is effectively reduced, and the efficiency of finite element analysis is improved.
Referring to fig. 9, fig. 9 is a flowchart of a fourth embodiment of a frame finite element simulation method according to the present invention.
Based on the above first embodiment, the frame finite element simulation method of the present embodiment in step S50 includes:
step S501: and determining the welding seam position in the target two-dimensional model and the parts to be welded.
It is understood that the weld position and the part to be welded are determined according to parameters corresponding to the three-dimensional model of the frame.
Step S502: and connecting the parts to be welded in the welding seam position in a binding contact mode to obtain a finite element simulation model of the frame to be simulated.
It will be appreciated that a reasonable tolerance can be set when a weld is required to be established so that binding contact is automatically established between the two components, thereby reducing the effort.
According to the method, the welding connection of the parts is simplified into the connection of the parts at the welding seam positions of the two parts in a binding contact mode, so that the scale of a frame finite element model is effectively reduced, and the efficiency of finite element analysis is improved.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium is stored with a frame finite element simulation program, and the frame finite element simulation program realizes the steps of the frame finite element simulation method when being executed by a processor.
Referring to fig. 10, fig. 10 is a block diagram of a first embodiment of a finite element simulation apparatus for a vehicle frame according to the present invention.
As shown in fig. 10, a frame finite element simulation device according to an embodiment of the present invention includes: .
The acquisition module 10 is used for acquiring the three-dimensional model of the frame to be simulated.
Referring to fig. 3, fig. 3 is a schematic diagram of a three-dimensional model of a vehicle frame according to an embodiment of the present invention, and the vehicle frame assembly is symmetric left and right, wherein main components include a longitudinal beam 1, a cross beam 2, a cross beam connecting plate 3 and a vehicle body connecting plate 4; the parts are riveted and welded. Modeling the frame assembly by software such as UG (Unigraphics), solidWorks, CATIA and Pro/E resulted in the geometric model shown in FIG. 3.
It should be noted that, the process of obtaining the three-dimensional model of the frame to be simulated may be to model the frame assembly in advance through modeling software, output a file in a general format, send the file to the obtaining module 10, and the obtaining module 10 reads the file in the general format to obtain the three-dimensional model of the frame to be simulated.
A conversion module 20 for converting the three-dimensional model into a two-dimensional shell-cell structural model.
It can be understood that the three-dimensional model is imported into finite element analysis software, and is converted into a two-dimensional shell element structure model, the shell element is given according to actual thickness, the finite element analysis software can be ANSA Workbench or HypermeSh, and the user can display the three-dimensional structure by displaying the thickness to the two-dimensional shell element structure model.
Referring to fig. 4, fig. 4 is a schematic diagram of a frame three-dimensional model and a two-dimensional shell unit structure model in comparison with the three-dimensional model, in which the two-dimensional shell unit structure model has a simpler structure and a simpler gridding process according to an embodiment of the frame finite element simulation method.
And the gridding module 30 is used for carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model.
In this embodiment, the gridding processing may be implemented by processing modes such as free gridding, mapping gridding, and mixed gridding, or the holes connected by rivets and other important holes may be divided separately, and then the rest of the holes are gridded, so that the gridding processing is performed on the two-dimensional shell unit structural model, and a gridded two-dimensional model is obtained.
It will be appreciated that the step of implementing the gridding process by free meshing may include: the intelligent size control technology of ANSYS finite element analysis software is utilized to automatically control the size and the density distribution of the grid, and preset parameters can be input to realize the control of the size of the grid, the control of the density distribution, the selection of a grid dividing algorithm and the like. The step of implementing the gridding process by mapping meshing may include: and cutting the model into a series of hexahedrons by utilizing an ANSYS Boolean operation function, and then carrying out mapping grid division on the cut cubes. The step of implementing the gridding process by hybrid meshing may include: according to the specific of the longitudinal beam, the cross beam connecting plate and the vehicle body connecting plate, various grid division modes such as free, mapping, sweeping and the like are adopted respectively, so that a finite element model with the best comprehensive effect is formed. In order to improve the calculation accuracy and reduce the calculation time, firstly, a hexahedral mesh is firstly divided for a region suitable for scanning and mapping mesh division, and the hexahedral unit with nodes in the region which is actually unable to be segmented any more and is divided by a tetrahedral free mesh is adopted for free mesh division.
And the optimization module 40 is used for performing rivet connection optimization processing on the gridding two-dimensional model to obtain a target two-dimensional model.
The rivet connection optimizing process may include optimizing the rivet connection in a connection manner such as a simulation bolt and spot welding, or may include replacing the rivet connection with a beam unit, thereby obtaining the target two-dimensional model.
And the simplification module 50 is used for performing welding connection simplification processing on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated.
It will be appreciated that the parts are joined by means of binding contacts at the weld locations of the two parts, thereby allowing for a simplified handling of the welded connection.
And the verification module 60 is used for carrying out frame stress verification according to the finite element simulation model.
The method is characterized in that the stress condition of the frame can be verified by inputting stress condition parameters into the finite element simulation model according to actual conditions, and a powerful verification means is provided for vehicle development.
It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.
The three-dimensional model of the frame to be simulated is obtained; converting the three-dimensional model into a two-dimensional shell unit structure model; carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model; rivet connection optimization treatment is carried out on the gridding two-dimensional model, and a target two-dimensional model is obtained; performing welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated; and carrying out the stress verification of the vehicle frame according to the finite element simulation model. Through the mode, the three-dimensional model is converted into the two-dimensional model, the two-dimensional model is simpler in grid division compared with the three-dimensional model, the number of grids is smaller, the scale of the frame finite element model is effectively reduced, the rivet connection is optimized, the welding connection is simplified, and the efficiency of finite element analysis is improved.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in the present embodiment may refer to the frame finite element simulation method provided in any embodiment of the present invention, which is not described herein.
In an embodiment, the meshing module 30 is further configured to perform an independent meshing process on the target hole corresponding to the two-dimensional shell unit structural model to obtain a hole portion meshing model;
performing grid division on the model except for the target hole in the two-dimensional shell unit structure model to obtain a partial grid model;
and obtaining a grid two-dimensional model according to the hole grid model and the partial grid model.
In one embodiment, the gridding module 30 is further configured to add a stamping surface to the periphery of the target hole according to the pressing surface of the rivet, so as to obtain a target hole with the stamping surface;
and performing independent grid division processing on the target hole carrying the imprinting surface.
In an embodiment, the optimizing module 40 is further configured to convert the rivet connection unit in the gridding two-dimensional model into a beam structural unit with the same cross section as the rivet, so as to obtain the target two-dimensional model.
In an embodiment, the optimizing module 40 is further configured to obtain information of rivet connection units in the meshed two-dimensional model;
determining rivet section information and rivet connected shell units according to the rivet connection unit information;
determining a remote point of action from the rivet-connected shell elements;
selecting a beam unit structure, wherein the section information corresponding to the beam unit structure is the same as the rivet section information;
and connecting the remote action points through the beam unit structure to obtain a target two-dimensional model.
In an embodiment, the optimizing module 40 is further configured to determine, according to the rivet-connected shell unit, a print surface corresponding to the rivet connection hole;
and simulating the associated remote action point according to the imprinting surface.
In an embodiment, the simplifying module 50 is further configured to determine a weld position and a part to be welded in the target two-dimensional model;
and connecting the parts to be welded in the welding seam position in a binding contact mode to obtain a finite element simulation model of the frame to be simulated.
Furthermore, it should 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 one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (8)
1. The frame finite element simulation method is characterized by comprising the following steps of:
acquiring a three-dimensional model of a frame to be simulated;
converting the three-dimensional model into a two-dimensional shell element structure model;
carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model;
performing rivet connection optimization treatment on the meshed two-dimensional model to obtain a target two-dimensional model;
performing welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated;
carrying out frame stress verification according to the finite element simulation model;
the step of performing gridding treatment on the two-dimensional shell unit structure model to obtain a gridded two-dimensional model comprises the following steps:
performing independent grid division treatment on the target holes corresponding to the two-dimensional shell unit structure model to obtain a hole part grid model;
performing grid division on the model except for the target hole in the two-dimensional shell unit structure model to obtain a partial grid model;
obtaining a meshed two-dimensional model according to the hole meshed model and the partial meshed model;
the step of performing individual grid division processing on the target holes corresponding to the two-dimensional shell unit structure model comprises the following steps:
adding a stamping surface on the periphery of the target hole according to the pressing surface of the rivet to obtain a target hole with the stamping surface, wherein the shape and the size of the stamping surface are the same as those of the pressing surface of the rivet;
and performing independent grid division processing on the target hole carrying the imprinting surface.
2. The method for simulating finite elements of a vehicle frame according to claim 1, wherein the rivet connection optimization processing is performed on the gridding two-dimensional model to obtain a target two-dimensional model, and the method comprises the following steps:
and converting the rivet connection unit in the gridding two-dimensional model into a beam structure unit with the same section as the rivet to obtain the target two-dimensional model.
3. The method for finite element simulation of a vehicle frame according to claim 2, wherein the converting the rivet connection units in the two-dimensional gridding model into beam structure units with the same cross section as the rivets to obtain the target two-dimensional model comprises:
acquiring rivet connection unit information in the gridding two-dimensional model;
determining rivet section information and rivet connected shell units according to the rivet connection unit information;
determining a remote point of action from the rivet-connected shell elements;
selecting a beam unit structure, wherein the section information corresponding to the beam unit structure is the same as the rivet section information;
and connecting the remote action points through the beam unit structure to obtain a target two-dimensional model.
4. A method of finite element simulation of a vehicle frame according to claim 3, wherein said determining a remote point of action from said rivet connected shell elements comprises:
determining a stamping surface corresponding to the rivet connection hole according to the shell units connected by the rivet;
and simulating the associated remote action point according to the imprinting surface.
5. The method for finite element simulation of a vehicle frame according to claim 1, wherein the performing a welding connection simplification process on the target two-dimensional model to obtain a finite element simulation model of the vehicle frame to be simulated comprises:
determining the position of a welding line in the target two-dimensional model and a part to be welded;
and connecting the parts to be welded in the welding seam position in a binding contact mode to obtain a finite element simulation model of the frame to be simulated.
6. A frame finite element simulation device, characterized in that the frame finite element simulation device comprises:
the acquisition module is used for acquiring a three-dimensional model of the frame to be simulated;
the conversion module is used for converting the three-dimensional model into a two-dimensional shell unit structure model;
the gridding module is used for carrying out gridding treatment on the two-dimensional shell unit structure model to obtain a gridding two-dimensional model;
the optimization module is used for carrying out rivet connection optimization treatment on the gridding two-dimensional model to obtain a target two-dimensional model;
the simplification module is used for carrying out welding connection simplification treatment on the target two-dimensional model to obtain a finite element simulation model of the frame to be simulated;
the verification module is used for verifying the stress of the frame according to the finite element simulation model;
the gridding module is further used for performing independent gridding treatment on the target holes corresponding to the two-dimensional shell unit structural model to obtain a hole part gridding model;
performing grid division on the model except for the target hole in the two-dimensional shell unit structure model to obtain a partial grid model;
obtaining a meshed two-dimensional model according to the hole meshed model and the partial meshed model;
the meshing module is further used for adding a stamping surface to the periphery of the target hole according to the pressing surface of the rivet to obtain the target hole with the stamping surface, and the shape and the size of the stamping surface are the same as those of the pressing surface of the rivet;
and performing independent grid division processing on the target hole carrying the imprinting surface.
7. A frame finite element simulation apparatus, the apparatus comprising: a memory, a processor and a carriage finite element simulation program stored on the memory and executable on the processor, the carriage finite element simulation program configured to implement the steps of the carriage finite element simulation method of any of claims 1 to 5.
8. A storage medium having stored thereon a carriage finite element simulation program which when executed by a processor performs the steps of the carriage finite element simulation method of any of claims 1 to 5.
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| CN113722823B (en) * | 2021-08-30 | 2024-02-09 | 江南造船(集团)有限责任公司 | Board gap pretreatment method suitable for finite element analysis of ship structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470091A (en) * | 1992-07-31 | 1995-11-28 | Klein Bicycle Corporation | Cable guide for bicycle frames and method for increasing frame strength |
| CN104112050A (en) * | 2014-07-23 | 2014-10-22 | 中国人民解放军装甲兵工程学院 | Optimum design method of non-bearing frame structure of light vehicle |
| CN105183976A (en) * | 2015-09-02 | 2015-12-23 | 南车株洲电力机车研究所有限公司 | Method for carrying out finite element analysis on vehicle-mounted cabinet body |
| CN110147626A (en) * | 2019-05-22 | 2019-08-20 | 兰州理工大学 | The hot emulation mode of motor, device and electronic equipment |
| CN110955930A (en) * | 2019-10-22 | 2020-04-03 | 首钢集团有限公司 | Mining engineering vehicle lightweight model obtaining method and device |
| CN111400817A (en) * | 2018-12-30 | 2020-07-10 | 长城汽车股份有限公司 | Method for determining automobile frame connection point with modular structure, non-bearing automobile frame and automobile |
| CN111401678A (en) * | 2020-01-19 | 2020-07-10 | 北京华路安交通科技有限公司 | Vehicle model verification system and method for guardrail safety performance evaluation |
| JP6769536B1 (en) * | 2019-09-30 | 2020-10-14 | Ｊｆｅスチール株式会社 | Vibration noise reduction analysis method and analysis device for automobile panel parts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180067003A1 (en) * | 2015-03-31 | 2018-03-08 | NejiLaw inc. | Conduction-path-equipped member, method for patterning conduction path, and method for measuring changes in member |
-
2020
- 2020-10-30 CN CN202011206698.4A patent/CN112199783B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470091A (en) * | 1992-07-31 | 1995-11-28 | Klein Bicycle Corporation | Cable guide for bicycle frames and method for increasing frame strength |
| CN104112050A (en) * | 2014-07-23 | 2014-10-22 | 中国人民解放军装甲兵工程学院 | Optimum design method of non-bearing frame structure of light vehicle |
| CN105183976A (en) * | 2015-09-02 | 2015-12-23 | 南车株洲电力机车研究所有限公司 | Method for carrying out finite element analysis on vehicle-mounted cabinet body |
| CN111400817A (en) * | 2018-12-30 | 2020-07-10 | 长城汽车股份有限公司 | Method for determining automobile frame connection point with modular structure, non-bearing automobile frame and automobile |
| CN110147626A (en) * | 2019-05-22 | 2019-08-20 | 兰州理工大学 | The hot emulation mode of motor, device and electronic equipment |
| JP6769536B1 (en) * | 2019-09-30 | 2020-10-14 | Ｊｆｅスチール株式会社 | Vibration noise reduction analysis method and analysis device for automobile panel parts |
| CN110955930A (en) * | 2019-10-22 | 2020-04-03 | 首钢集团有限公司 | Mining engineering vehicle lightweight model obtaining method and device |
| CN111401678A (en) * | 2020-01-19 | 2020-07-10 | 北京华路安交通科技有限公司 | Vehicle model verification system and method for guardrail safety performance evaluation |
Non-Patent Citations (3)
| Title |
|---|
| 100％低地板钢铝混合铆接车体疲劳强度评估;李祥涛，等;《机械设计》;第291-294页 * |
| 某电动汽车车架有限元分析与优化;乔鑫;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;第C035-65页 * |
| 钢铝混合车体铆接结构有限元建模方法研究;温朋哲，等;《机车电传动》;第106-110页 * |
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