CN116305935A - Design method and device for riveting points of aluminum alloy haircovers - Google Patents

Design method and device for riveting points of aluminum alloy haircovers Download PDF

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CN116305935A
CN116305935A CN202310263486.7A CN202310263486A CN116305935A CN 116305935 A CN116305935 A CN 116305935A CN 202310263486 A CN202310263486 A CN 202310263486A CN 116305935 A CN116305935 A CN 116305935A
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haircover
aluminum alloy
assembly
riveting
analysis
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肖永富
马明辉
张雨
于保君
李�赫
李景潭
王月
徐安杨
杨涛
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FAW Group Corp
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FAW Group Corp
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
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    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14Force analysis or force optimisation, e.g. static or dynamic forces
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

The invention discloses a design method and a design device for riveting points of an aluminum alloy haircover, and belongs to the technical field of automobiles. In the development stage of the aluminum alloy haircover product, the technology is applied to realize optimal arrangement of riveting points, and the forward development capability of the riveting points of the aluminum alloy haircover is formed.

Description

Design method and device for riveting points of aluminum alloy haircovers
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a design method and device for riveting points of an aluminum alloy haircover.
Background
With the gradual popularization of new energy vehicles, the weight reduction of the vehicles becomes more important, and the weight reduction has obvious effects on the continuous voyage of the new energy vehicles and the cost control of batteries. As a light metal, the aluminum alloy not only maintains the high modulus and high strength of the metal, but also realizes great weight reduction, the use amount of new energy vehicles gradually rises in recent years, and the hair mask is one of automobile parts which are made of aluminum alloy materials because of relatively simple structure and process and small cost increase amplitude. Compared with steel materials, the aluminum alloy adopts a welding mode to heat affected zone greatly, and the welding quality is not stable in steel, so that the common aluminum alloy plate is connected in a riveting, screwing or gluing mode, and compared with steel welding spots, the cost of the riveting points is increased by about 5 times, and the quantity of the aluminum alloy riveting points needs to be strictly controlled.
At present, most of light weight researches on the haircovers adopt topological optimization, light weight of a multi-target structure and the like, for example, the section brocade Cheng Shuoshi paper 'light weight design of an automobile engine hood' carries out multi-target optimization on the aluminum alloy haircovers by adopting the isight software, so that the light weight design of the aluminum alloy haircovers is realized, the number of riveting points of the aluminum haircovers is still remained in an experience design stage, and no effective digital means are used for optimization.
Disclosure of Invention
The invention provides a design method and a device for riveting points of an aluminum alloy haircover, which aims at solving the problems of overhigh cost and the like of the riveting points of aluminum alloy plates in the prior art. In the development stage of the aluminum alloy haircover product, the technology is applied to realize optimal arrangement of riveting points, and the forward development capability of the riveting points of the aluminum alloy haircover is formed.
The invention is realized by the following technical scheme:
in a first aspect, the invention provides a design method of aluminum alloy haircover riveting points, which comprises the following steps:
step one: geometric data of the haircover assembly and the accessories are obtained, and the data are checked to ensure that the position relation and connection are correct;
step two: extracting a neutral plane of the haircover guard plate assembly, completing grid division of the haircover assembly, and performing grid treatment of an inner plate, an outer plate, a reinforcing plate and an inner plate and outer plate edge-wrapping structure of the haircover to complete modeling of the aluminum alloy haircover assembly;
step three: completing assembly of an assembly model and grid quality inspection, including modeling of riveting points;
step four: imparting material properties;
step five: setting boundary conditions and loads, completing modal analysis of the haircover assembly, checking the vibration modes of each order, ensuring the correct connection relation among all parts, and completing lateral rigidity, middle constraint torsional rigidity, side constraint torsional rigidity, surface rigidity and pre-deformation analysis of the haircover assembly;
step six: structural optimization is carried out on analysis items with unqualified rigidity performance until all rigidity performances of the haircover reach target values;
step seven: the riveting point encryption is carried out on the part of the riveting point of the aluminum alloy engine cover, the position of the riveting point is required to be ensured to be reasonable, and the feasibility is realized;
step eight: taking riveting points as design variables, taking rigidity performance as constraint and taking the minimum mass as a target, and performing aluminum alloy engine hood space topology optimization;
step nine: and verifying the topological optimization result of the riveting point, including all rigidity performances of the haircover.
Further, the specific method of the first step is as follows:
the geometric data of the haircover assembly and the accessory are obtained, no penetration and free edge exist among the geometric data, the curved surface is continuous and complete, the connection relation between the positions is clear, and the real geometric structure of the connecting piece is required.
The specific method of the second step is as follows:
extracting the neutral surface of each part of the haircover assembly, putting the haircover assembly into different layers according to different material thicknesses, naming the haircover assembly according to the rules of part numbers, material thicknesses and material marks, wherein the basic grid of the haircover assembly is 8mm, and the treatment mode of flanging positions of inner and outer plates of the haircover is as follows: projecting the normal direction of the free edge of the flanging of the outer plate of the haircover to the inner plate of the haircover, dividing the inner plate of the haircover into two parts, and kneading the nodes of the inner plate and the outer plate grid on the projection line of the inner plate; for the haircover hinge axis, a bar unit is used for simulation, and the rotation freedom degree is released.
Further, the specific method of the third step is as follows:
after grid division is completed, assembling a model, connecting according to the actual connection relation of the haircover assembly, simulating a riveting point by adopting a hexahedral solid unit, simulating an adhesive unit by adopting a solid unit, and rigidly connecting a screwing point; after the assembly of the model is completed, the quality inspection of grids is carried out, penetration is not allowed among the grids, the minimum unit size of the square grids of the shell units is 3mm, the maximum angle of the square is less than or equal to 160 degrees, the minimum angle is more than or equal to 20 degrees, and the Jacobian is more than or equal to 0.6.
Further, the specific method of the fourth step is as follows:
for the haircover assembly, the material is endowed with three parameters of elastic modulus, poisson ratio and density, the actual material thickness is endowed, and for the hinge shaft, the attribute is endowed according to the actual diameter, and the gluing position is endowed with the corresponding material parameters of glue.
Further, the specific method of the fifth step is as follows:
firstly, carrying out free mode analysis of the haircover assembly, wherein an analysis model does not comprise a hinge, extracting a front ten-order mode shape, ensuring that the connection relation of the haircover assembly is correct, and secondly, carrying out lateral rigidity, middle constraint torsional rigidity and side constraint torsional rigidity analysis; and performing haircover pre-deformation analysis again, wherein the load of haircover pre-deformation is a nonlinear compression force curve of the sealing strip, a nonlinear load of the buffer block, a counter force of the stay bar and self gravity, and finally performing surface rigidity analysis, wherein a nonlinear characteristic curve is required to be given to the material during the surface rigidity analysis.
Further, the specific method of the step six is as follows:
and under the condition that the rigidity performance of the haircover assembly is unsatisfied, the structural optimization of the haircover assembly is carried out, the optimization method is to carry out targeted structural reinforcement on the position with larger local deformation or weak position according to the analyzed displacement and stress cloud picture, and the optimization scheme needs to consider space and feasible process until all the analysis performances meet the target requirements.
Further, the specific method of the step seven is as follows:
the riveting points of the haircover assembly are encrypted, the encrypted positions are reasonable, the fitting between parts is guaranteed, the process can be realized, and the encrypted riveting points are about 3 times of the original riveting points.
Further, the specific method of the step eight is as follows:
space topology optimization is carried out on the riveting points, the body units of the riveting points are designed variables, lateral rigidity, middle constraint torsional rigidity and side constraint torsional rigidity are constraint conditions, the minimum mass is an optimization target, and topology optimization analysis is carried out; and extracting a topological optimization result, wherein the color is from deep to light, and the riveting point correspondingly plays a role from high to low.
Further, the specific method of the step nine is as follows:
according to the topological optimization result of the riveting points, deleting the riveting points with low importance, and reserving the riveting points with high importance, wherein the sequence of deleting the riveting points is deleting from the lowest importance; and after the deletion is finished, performance verification is sequentially carried out on the haircover assembly mode, the lateral rigidity, the middle constraint torsional rigidity, the side constraint torsional rigidity, the surface rigidity and the haircover pre-deformation, if the performance does not meet the target, the finally deleted riveting point is added, the performance verification is carried out again until the performance is qualified, and the process is finished.
In a second aspect, the present invention further provides an aluminum alloy haircover riveting point design apparatus, including:
the geometric quality checking module is used for checking whether the geometric data has penetration and whether the connection relation is correct;
the grid division module is used for carrying out grid division on the hairmask assembly according to the obtained geometrical data of the hairmask;
the assembly and quality inspection module is used for establishing a finite element model, assembling the parts according to the actual installation positions of the parts of the aluminum alloy haircover, inspecting the mesh quality of the assembled model and outputting inspection results;
the attribute giving module is used for giving material attribute and material nonlinear characteristic to each part;
the performance analysis module is used for setting boundary conditions and load steps, and carrying out modal analysis, haircover lateral stiffness analysis, haircover edge constraint torsional stiffness analysis, haircover middle constraint torsional stiffness analysis, haircover sealing strip pre-deformation analysis and haircover surface stiffness analysis on the model;
the performance optimization module is used for optimizing various unqualified performances of the aluminum alloy haircover, and the optimization method comprises the steps of performing structural optimization according to deformation and a stress cloud picture;
the riveting point encryption module is used for encrypting the riveting points of the aluminum alloy haircover;
the riveting point space topology optimization module is used for performing space topology optimization on the encrypted aluminum alloy haircover riveting points so as to obtain an optimal riveting point space arrangement form;
and the haircover performance verification module is used for verifying the performance of the aluminum alloy haircover assembly after the riveting point is optimized.
Compared with the prior art, the invention has the following advantages:
the design method and the device for the riveting points of the aluminum alloy haircover can accurately simulate the haircover assembly, the modeling of the riveting points and the connection relation, predict the performance of the aluminum alloy haircover in the product design stage, optimize the structure, and optimally arrange the riveting points of the aluminum alloy haircover in space, thereby achieving the purpose of reducing the number of the riveting points of the aluminum alloy haircover, effectively reducing the development cost of the aluminum alloy haircover, effectively optimizing the production and manufacturing beats due to the reduction of the number of the riveting points, shortening the manufacturing period of the aluminum alloy haircover and providing a digital intelligence technical means for the development of the aluminum alloy haircover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a flow chart of a design method of aluminum alloy haircover riveting points according to the invention;
fig. 2 is a schematic structural diagram of an aluminum alloy haircover riveting point design device according to the invention.
Detailed Description
For a clear and complete description of the technical scheme and the specific working process thereof, the following specific embodiments of the invention are provided with reference to the accompanying drawings in the specification:
in the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Example 1
FIG. 1 is a flow chart of a design method of riveting points of an aluminum alloy haircover in the embodiment; the embodiment is applicable to the case of aluminum alloy haircover riveting point design, and the method can be implemented by an aluminum alloy haircover riveting point design device in embodiment 2 of the invention, and the device can be implemented in a software and/or hardware mode.
The design method specifically comprises the following steps:
s1, acquiring geometric data of an aluminum alloy haircover, checking the geometric data, ensuring that parts are not penetrated, and ensuring that the connection relationship is correct and free edges are not generated.
S2, carrying out grid division on the aluminum alloy haircover;
the basic grid of the haircover assembly is 8mm, and the treatment mode of the flanging of the inner plate and the outer plate of the haircover is as follows: projecting the normal direction of the free edge of the flanging of the outer plate of the haircover to the inner plate of the haircover, dividing the inner plate of the haircover into two parts, and coupling the grid nodes of the inner plate and the outer plate on the projection line of the inner plate. For the haircover hinge axis, a bar unit was used for simulation.
And S3, completing connection assembly of the haircover assembly model according to the actual state of the haircover of the vehicle, and checking the grid quality of the haircover finite element model after connection.
When the connecting assembly is carried out, the riveting point is modeled by adopting a hexahedron, the diameter is 8mm, the gluing unit is also a hexahedral unit, and the hinge shaft is released around the axial rotation degree of freedom. No penetration is allowed between grids, for a square grid of a shell unit, the minimum unit size is 3mm, the maximum angle of the square is not more than 160 degrees, the minimum angle is not less than 20 degrees, the Jacobian is not less than 0.6, and the unit length-width ratio is not more than 5.
And S4, giving materials and properties to the assembled aluminum alloy haircover assembly.
The aluminum alloy material is input with three parameters of elastic modulus, poisson ratio and density, the gluing unit endows the material parameters of the glue material, and the hinge shaft is endowed with properties according to the actual diameter. Surface stiffness analysis, aluminum alloy outer plate materials are required to endow the materials with nonlinear characteristic curves. And (3) pre-deformation analysis of the sealing strip, wherein the sealing strip and the buffer block are also used for endowing a nonlinear characteristic curve of the material.
S5, analyzing the performance of the aluminum alloy haircover assembly;
firstly, carrying out modal analysis of the haircover assembly, wherein a model does not need to be provided with a hinge during modal analysis, so that the free modes of the first ten steps of the haircover assembly are completed, the mode shape of each step is checked, and the connection relationship of the model is ensured to be correct. After the modal analysis is completed, the lateral rigidity, the middle constraint torsional rigidity and the side constraint torsional rigidity of the haircover assembly are analyzed, and then the predeformation of the haircover sealing strip and the surface rigidity analysis are performed.
S6, optimizing and analyzing the performance of the haircover, and if a certain performance of the haircover does not meet the requirement, optimizing and analyzing the haircover;
the optimization analysis of the haircover mainly optimizes the structure of the haircover, finds out the weak position of the structure according to the displacement and the stress cloud picture of the corresponding working condition, and performs local structure optimization until the performance meets the requirement.
S7, encrypting the riveting points of the haircover assembly;
the position of encryption is reasonable, the fitting between parts is ensured, the technology can be realized, the number of the encrypted riveting points is about 3 times that of the original riveting points, the material property is also endowed to the riveting points, and the diameter of the riveting points is 8mm.
S8, space topology optimization of riveting points
And performing space topology optimization on the riveting points, setting three elements of optimization, taking a riveting point body unit as a design variable, taking lateral rigidity, middle constraint torsional rigidity and side constraint torsional rigidity as constraint conditions, taking the minimum mass as an optimization target, and performing topology optimization analysis. And extracting a topological optimization result, wherein the color is from deep to light, and the riveting point correspondingly plays a role from high to low.
S9, aluminum alloy haircover performance verification
And deleting the riveting points with low importance according to the topological optimization result of the riveting points, and reserving the riveting points with high importance, wherein the sequence of deleting the riveting points is deleting from the lowest importance. And after the deletion is finished, performance verification is sequentially carried out on the haircover assembly mode, the lateral rigidity, the middle constraint torsional rigidity, the side constraint torsional rigidity, the surface rigidity and the haircover pre-deformation, if the performance does not meet the target, the finally deleted riveting point is added, the performance verification is carried out again until the performance is qualified, and the process is finished.
Example two
Referring to fig. 2, an aluminum alloy haircover riveting point design apparatus includes:
the geometric quality checking module is used for checking whether the geometric data has penetration and whether the connection relation is correct;
the grid division module is used for carrying out grid division on the haircover according to the obtained geometric data of the haircover assembly;
the assembly and quality inspection module is used for establishing a finite element model, assembling the parts according to the actual installation positions of the parts of the haircover assembly and inspecting the quality of the divided grids;
the attribute giving module is used for giving material parameters and attributes;
the performance analysis module is used for setting a load step, firstly carrying out modal analysis on the model, extracting a tenth-order free mode, confirming whether the vibration shape of each order model is reasonable or not, if the connection relationship is incorrect, adjusting the connection relationship of the model; secondly, carrying out pre-deformation analysis on lateral rigidity, side constraint torsional rigidity, middle constraint torsional rigidity, surface rigidity and sealing strips on the haircover assembly;
the performance optimization module is used for carrying out structural optimization on the haircover assembly so as to meet the performance requirement of the haircover assembly;
the riveting point encryption module is used for encrypting the riveting points of the aluminum alloy haircover;
the riveting point topology optimization module is used for performing topology optimization analysis on the riveting points encrypted by the haircover assembly so as to obtain the optimal arrangement form and quantity of the riveting points;
the haircover performance verification module is used for verifying whether the isotropic performance of the haircover assembly after the riveting point optimization is qualified or not
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims (10)

1. The design method of the riveting point of the aluminum alloy haircover is characterized by comprising the following steps of:
step one: geometric data of the haircover assembly and the accessories are obtained, and the data are checked to ensure that the position relation and connection are correct;
step two: extracting a neutral plane of the haircover guard plate assembly, completing grid division of the haircover assembly, and performing grid treatment of an inner plate, an outer plate, a reinforcing plate and an inner plate and outer plate edge-wrapping structure of the haircover to complete modeling of the aluminum alloy haircover assembly;
step three: completing connection assembly of all parts of the haircover assembly and checking the quality of the grids;
step four: giving materials and properties to each part of the haircover assembly;
step five: setting boundary conditions and loads, completing modal analysis of the haircover assembly, checking the vibration modes of each order, ensuring the correct connection relation among all parts, and completing lateral rigidity, middle constraint torsional rigidity, side constraint torsional rigidity, surface rigidity and pre-deformation analysis of the haircover assembly;
step six: structural optimization is carried out on analysis items with unqualified rigidity performance until all rigidity performances of the haircover reach target values;
step seven: locally encrypting riveting points of the aluminum alloy engine hood;
step eight: space topology optimization is carried out on the haircover assembly after the riveting point encryption;
step nine: and performing performance verification on the optimized haircover assembly.
2. The method for designing the riveting point of the aluminum alloy haircover according to claim 1, wherein the specific method in the first step is as follows:
obtaining geometric data of the aluminum alloy haircover, and performing quality inspection on the data to ensure that the data is not penetrated, free edges are not generated, and the connection relationship is correct;
the specific method of the second step is as follows:
the parts of the haircover assembly are subjected to extraction surface treatment according to the respective geometric characteristics, the basic grid of the unit is 8mm, for the treatment of aluminum haircover edge wrapping, the free edge normal direction of the flanging position of the outer plate of the haircover is projected to the inner plate of the haircover, the inner plate of the haircover is divided into two parts, and on the projection line of the inner plate, the grid nodes of the inner plate and the outer plate are coupled; for the haircover hinge axis, a bar unit was used for simulation.
3. The method for designing riveting points of aluminum alloy haircover according to claim 1, wherein in the third step, hexahedral units with the diameter of 8mm are adopted for the simulation of riveting points of the haircover assembly, and body units are adopted for the simulation of the gluing units, so that the freedom of rotation of the hinge shaft around the axial direction is released; no penetration is allowed between grids, for a square grid of a shell unit, the minimum unit size is 3mm, the maximum angle of the square is not more than 160 degrees, the minimum angle is not less than 20 degrees, the Jacobian is not less than 0.6, and the unit length-width ratio is not more than 5.
4. The design method of the aluminum alloy haircover riveting point as claimed in claim 1, wherein the specific method of the fourth step is as follows:
for the haircover assembly, the material is endowed with three parameters of elastic modulus, poisson ratio and density, each part is endowed with thickness attribute according to actual thickness, the hinge axis is endowed with corresponding attribute according to actual diameter, and the gluing position is endowed with corresponding material parameter of glue.
5. The design method of the riveting point of the aluminum alloy haircover according to claim 1, wherein the specific method in the fifth step is as follows:
firstly, completing modal analysis of an aluminum alloy haircover, extracting a front ten-order modal value and a vibration mode, confirming that the connection relation among parts is correct according to a modal result, and secondly, carrying out pre-deformation analysis on lateral rigidity, middle constraint torsional rigidity, side constraint torsional rigidity, surface rigidity and sealing strips of the haircover; and performing haircover pre-deformation analysis again, wherein the load of haircover pre-deformation is a nonlinear compression force curve of the sealing strip, a nonlinear load of the buffer block, a counter force of the stay bar and self gravity, and finally performing surface rigidity analysis, wherein a nonlinear characteristic curve is required to be given to the material during the surface rigidity analysis.
6. The design method of the riveting point of the aluminum alloy haircover according to claim 1, wherein the specific method in the step six is as follows:
and reinforcing the weak structure position according to the solved displacement and stress results, wherein the structural optimization scheme is required to be arranged and the process is feasible until all performances meet the target requirements.
7. The method for designing the riveting point of the aluminum alloy haircover according to claim 1, wherein the method in the seventh step is as follows:
the riveting points of the haircover assembly are encrypted, the positions of the riveting points are feasible in space arrangement and process, adjacent parts of the riveting points are kept attached at the assembly positions, and the number of the riveting points is 3 times.
8. The method for designing the riveting point of the aluminum alloy haircover according to claim 1, wherein the specific method in the step eight is as follows:
performing space topology optimization on the riveting points, setting three elements of optimization, wherein a riveting point body unit is a design variable, lateral rigidity, middle constraint torsional rigidity and side constraint torsional rigidity are constraint conditions, and the minimum mass is an optimization target, and performing space topology optimization analysis on the riveting points; and extracting a topological optimization result, wherein the color is from deep to light, and the riveting point correspondingly plays a role from high to low.
9. The method for designing the riveting point of the aluminum alloy haircover according to claim 1, wherein the specific method in the step nine is as follows:
according to the topological optimization result of the riveting points, deleting the riveting points with low importance, and reserving the riveting points with high importance, wherein the sequence of deleting the riveting points is deleting from the lowest importance; and after the deletion is finished, performance verification is sequentially carried out on the haircover assembly mode, the lateral rigidity, the middle constraint torsional rigidity, the side constraint torsional rigidity, the surface rigidity and the haircover pre-deformation, if the performance does not meet the target, the finally deleted riveting point is added, the performance verification is carried out again until the performance is qualified, and the process is finished.
10. An aluminum alloy haircover riveting point design apparatus for implementing the method of any one of claims 1-9, comprising:
the geometric quality checking module is used for checking whether the geometric data has penetration and whether the connection relation is correct;
the grid division module is used for carrying out grid division on the hairmask assembly according to the obtained geometrical data of the hairmask;
the assembly and quality inspection module is used for establishing a finite element model, assembling the parts according to the actual installation positions of the parts of the aluminum alloy haircover, inspecting the mesh quality of the assembled model and outputting inspection results;
the attribute giving module is used for giving material attribute and material nonlinear characteristic to each part;
the performance analysis module is used for setting boundary conditions and load steps, and carrying out modal analysis, haircover lateral stiffness analysis, haircover edge constraint torsional stiffness analysis, haircover middle constraint torsional stiffness analysis, haircover sealing strip pre-deformation analysis and haircover surface stiffness analysis on the model;
the performance optimization module is used for optimizing various unqualified performances of the aluminum alloy haircover, and the optimization method comprises the steps of performing structural optimization according to deformation and a stress cloud picture;
the riveting point encryption module is used for encrypting the riveting points of the aluminum alloy haircover;
the riveting point space topology optimization module is used for performing space topology optimization on the encrypted aluminum alloy haircover riveting points so as to obtain an optimal riveting point space arrangement form;
and the haircover performance verification module is used for verifying the performance of the aluminum alloy haircover assembly after the riveting point is optimized.
CN202310263486.7A 2023-03-17 2023-03-17 Design method and device for riveting points of aluminum alloy haircovers Pending CN116305935A (en)

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