Simulation analysis method of multi-layer thin-walled rubber-metal composite rotating structure

Abstract

A simulation analysis method for a multi-layer thin-walled rubber-metal composite rotating body structure first performs a two-dimensional meshing operation on the multi-layer thin-walled rubber-metal composite rotating body; after completing the meshing of the two-dimensional axisymmetric section, an axial or torsional load simulation analysis is performed; after the axial or torsional load simulation analysis is completed, the two-dimensional axisymmetric mesh is transformed into a three-dimensional mesh, and the stress and strain results of the two-dimensional axisymmetric model are simultaneously mapped on the newly generated three-dimensional mesh as the initial stress and strain for the deflection or radial load simulation analysis; then, the three-dimensional model simulation analysis is continued under the deflection or radial load condition after axial or torsional preload, completing the axial, radial, torsional and deflection multi-load simulation analysis. The present invention intercepts a partial cross section of the composite rotating body, performs meshing and load analysis, and then performs simulation analysis of the three-dimensional model, thereby realizing the simulation analysis of the axial and torsional load conditions using a simple two-dimensional axisymmetric model.

Description

Technical Field

[0001] The present invention relates to a simulation analysis method for a load-bearing component, and in particular to a simulation analysis method for a multi-layer thin-walled rubber-metal composite rotating body structure. This simulation analysis method for the multi-layer thin-walled rubber-metal composite rotating body structure significantly improves the simulation analysis efficiency of the multi-layer thin-walled rubber-metal composite rotating body structure under multiple load conditions such as radial, axial, deflection and torsion by performing simulation analysis through 180-degree or 360-degree rotation. Background Art

[0002] On the one hand, multi-layer thin-walled rubber-metal composite rotors offer higher load-bearing capacity, aging resistance, and stability than traditional rubber-metal composite rotors. Tests have also shown that in this elastic metal structure, the unit consumption of elastomer can be reduced by one or more orders of magnitude, and the elastomer utilization factor in this structure has increased by more than nine times. Therefore, multi-layer thin-walled rubber-metal composite rotors are becoming increasingly popular. However, the deformation, structural, processing, and usage characteristics of multi-layer thin-walled rubber-metal composite rotors differ from those of traditional rubber-metal composite rotors, making stress analysis much more difficult.

[0003] On the other hand, with the intensification of market competition, product update cycles are becoming shorter and shorter, and companies are more eager for new technologies. Finite element simulation analysis technology is an effective means to improve product quality, shorten design cycles, and enhance product competitiveness. Therefore, with the development of computer technology and calculation methods, finite element simulation analysis has gained more and more attention and application in the field of engineering design and scientific research. It has become an effective way to solve complex engineering analysis and calculation problems. From automobiles to space shuttles, almost all design and manufacturing are inseparable from finite element simulation analysis and calculation. Its widespread use in various fields such as mechanical manufacturing, materials processing, aerospace, automobiles, civil engineering, electronics and electrical appliances, national defense and military industry, shipbuilding, railways, petrochemicals, energy and scientific research has brought about a qualitative leap in design level. Therefore, simulation analysis methods are generally used in the stress analysis of multi-layer thin-walled rubber-metal composite rotating bodies. Simulation analysis, with the help of virtual prototypes through computer and finite element simulation analysis, can help designers optimize the optimal structure during research and development, eliminate some unfavorable solutions, reduce the number of tests, and save R&D costs and prototype costs.

[0004] However, current simulation analysis typically meshes the entire component. Conventional meshing methods create separate 2D and 3D meshes for each rubber layer and each spacer layer. This method is inefficient for multi-layer rod-end bearings. This is particularly true for simulations under multiple load conditions, including radial, axial, deflection, and torsion. Furthermore, 3D meshing techniques are difficult and prone to non-convergence, necessitating improvements.

[0005] No patent literature reports on the same technology as the present invention were found through patent search. The following are the patents that are related to the present invention:

[0006] 1. The application number is CN202110222321.6, and the name is "A finite element parametric modeling method for bolts and nuts divided by hexahedral mesh". The applicant is Tianjin University's Chinese invention patent. The patent discloses a finite element parametric modeling method for bolts and nuts divided by hexahedral mesh, including the following steps: S1: Determine the geometric characteristics of the bolts and nuts; S2: Determine the mesh characteristics of the bolts and nuts; S3: Divide the bolts into nut area, screw area, transition area and thread area along the axial direction, and use the segmented expression method to construct the single-section node coordinates of the bolts and nuts perpendicular to the bolt axis; S4: Copy, translate, number and rotate the obtained single-section nodes of the bolts and nuts along the bolt axis to construct the node coordinate matrix of the entire bolt and nut model; S5: The node coordinates of the bolts and nuts obtained in step S4 are connected in the order of the eight-node hexahedral unit nodes in the finite element software; S6: Export the node coordinates and unit number matrix obtained in steps S3 and S5.

[0007] 2. The application number is CN201210267815.7, and the name is “Modeling method for three-dimensional simulation of complex motion system”. The applicant is the 92232nd Unit of the People’s Liberation Army of China. The patent discloses a modeling method for three-dimensional simulation of complex motion system. The method includes the following steps: (1) system composition hierarchical decomposition, which decomposes the complex motion system into subsystems at each level until the component unit; (2) determining the position coordinates, rotation angles, and relative position relationships and relative angle rotation relationships between the subsystems and component units at each level after decomposition; (3) recording the independent and relative motion relationships of the subsystems and component units at each level; (4) constructing the motion model of the entire system and the subsystems at each level based on the data relationships of (1), (2) and (3).

[0008] 3. The application number is CN201110302715.9, and the name is "A finite element parametric modeling method for bolts capable of realizing hexahedral mesh division". The applicant is Xi'an Jiaotong University, which is a Chinese invention patent. The patent discloses a finite element parametric modeling method for bolts capable of realizing hexahedral mesh division. The key geometric dimensions of the bolt model are parameterized in the finite element software, and a single-section model of the thread perpendicular to the bolt axis is constructed by a segmented expression method. The models of each thread section on a single pitch are constructed by using the key point translation and rotation method. The thread segment body model with the number of threads is generated along the bolt axis by body generation, copying and translation methods. The screw model without threads is divided according to the division boundary of the thread body model along the axis. The screw and thread joint are subjected to separate body generation processing. The bolt head body model is divided according to the division boundary of the thread body model along the axis. The entire bolt body model is divided by mapping, and finally a hexahedral mesh unit model of the bolt is generated.

[0009] Through careful analysis of the above patents, although some patents have proposed some simulation analysis methods and some improved technical solutions, through careful analysis, it is found that these patents still use the traditional overall modeling analysis method. Although different methods are used in mesh division, they do not solve the problem of large workload of conventional simulation analysis modeling for complex parts, especially for multi-layer thin-walled rubber-metal composite rotating bodies that are subject to multiple loads as the present invention involves. Therefore, the problems mentioned above still exist and need to be further studied and improved. Summary of the Invention

[0010] The purpose of the present invention is to overcome the shortcomings of existing simulation and analysis methods for multi-layer thin-walled rubber-metal composite rotating body structures, such as low simulation and analysis efficiency under multiple load conditions such as radial, axial, deflection and torsion, and the difficulty of three-dimensional mesh generation technology, which easily leads to non-convergence of calculations. A method is proposed that can simulate and analyze the mesh and stress and strain of a two-dimensional axisymmetric section by rotating it 180 degrees or 360 degrees.

[0011] To achieve this objective, the present invention provides a simulation analysis method for a multi-layer thin-walled rubber-metal composite rotating body structure. First, a two-dimensional meshing operation is performed on the multi-layer thin-walled rubber-metal composite rotating body. After the meshing of the two-dimensional axisymmetric cross section is completed, an axial or torsional load simulation analysis and calculation is performed. After the axial or torsional load simulation analysis is completed, the two-dimensional axisymmetric mesh is converted into a three-dimensional mesh, and the stress and strain results of the two-dimensional axisymmetric model are also synchronously mapped onto the newly generated three-dimensional mesh as the initial stress and strain for the deflection or radial load simulation analysis. Then, the three-dimensional model simulation analysis is continued under the deflection or radial load condition after axial or torsional preload, and finally the axial, radial, torsional and deflection multi-load simulation analysis and calculation are completed.

[0012] Furthermore, the two-dimensional meshing operation is to first extract a two-dimensional axisymmetric section from the multi-layer thin-walled rubber-metal composite rotating body structure, and then use this section to perform a two-dimensional meshing operation; the two-dimensional meshing operation is to extract the two-dimensional axisymmetric section and then perform the meshing required for the large deformation simulation analysis of rubber on this section.

[0013] Furthermore, the mesh generation adopts a finite element mesh generation method. When the finite element method is used for structural analysis, the structure must first be discretized to form a finite element mesh, and various information corresponding to the mesh is given.

[0014] Furthermore, the various information includes unit information, node coordinates, material information, constraint information and load information; the load information includes deflection load, radial load, axial load or torsional load information.

[0015] Furthermore, the discretization of the structure is to discretize the boundary curve, that is, to arrange points on the boundary according to the requirements of the density control function; the formation of the finite element mesh is to generate units in the target area, generate units and nodes according to specific circumstances, and divide them into boundary unit decomposition and internal unit decomposition; and use various information to optimize the finally generated mesh units.

[0016] Furthermore, the axial or torsional load simulation analysis calculation is to complete the mesh division of the two-dimensional axisymmetric section, continue to set the material properties, boundary conditions and other conventional simulation analysis pre-processing work, apply the axial or torsional load suitable for the two-dimensional axisymmetric section model, and perform simulation analysis on the two-dimensional axisymmetric section model based on the axial or torsional load.

[0017] Furthermore, when performing simulation analysis on the two-dimensional axisymmetric cross-section model based on axial or torsional load, it is determined whether the radial or deflection load has an axial preload, and different three-dimensional model simulation analyses are performed according to whether there is an axial preload.

[0018] Furthermore, the three-dimensional model simulation analysis under deflection or radial load conditions after axial or torsional preload is performed after the axial or torsional load simulation analysis is completed, and the axial preload exists; the two-dimensional axisymmetric grid is rotated 180 degrees or 360 degrees to generate a three-dimensional grid, and the stress and strain results of the two-dimensional axisymmetric model are also synchronously rotated 180 degrees or 360 degrees and mapped onto the newly generated 180-degree or 360-degree three-dimensional grid as the initial stress and strain for the deflection or radial load simulation analysis. The simulation analysis of the 180-degree or 360-degree three-dimensional model under the deflection or radial load conditions after the axial or torsional preload is continued, and finally the simulation analysis calculation of the axial, radial, torsional and deflection multiple load conditions is completed.

[0019] Furthermore, the three-dimensional model simulation analysis under deflection or radial load conditions after axial or torsional preload is performed without axial preload after the axial or torsional load simulation analysis is completed; the two-dimensional axisymmetric section model is rotated 180 degrees or 360 degrees, and a three-dimensional mesh is generated before performing simulation analysis based on radial or deflection load conditions.

[0020] Furthermore, the simulation analysis method of the multi-layer thin-walled rubber-metal composite rotating body structure includes the following steps:

[0021] Step 1: Perform a two-dimensional axisymmetric analysis on the multi-layer thin-walled rubber-metal composite body of revolution to be meshed, and select a two-dimensional axisymmetric section;

[0022] Step 2: Extract a 2D axisymmetric cross section from the multi-layer thin-walled rubber-metal composite body of revolution and perform a 2D meshing operation on this cross section. Perform meshing on this cross section for large rubber deformation simulation analysis. Generate a 2D mesh on this 2D axisymmetric cross section that is conducive to large rubber deformation.

[0023] Step 3: After completing the meshing of the 2D axisymmetric section, continue with the routine simulation analysis pre-processing work such as setting material properties and boundary conditions;

[0024] Step 4: Perform simulation analysis based on axial or torsional loads on the two-dimensional axisymmetric cross-section model; apply axial or torsional loads suitable for the two-dimensional axisymmetric cross-section model, and then perform simulation analysis calculations under the axial or torsional loads;

[0025] Step 5: After the simulation analysis under axial or torsional load is completed, the 2D axisymmetric mesh is rotated 180 degrees or 360 degrees to generate a 3D mesh. At the same time, the stress and strain results of the 2D axisymmetric model are also rotated 180 degrees or 360 degrees and mapped onto the newly generated 180-degree or 360-degree 3D mesh to serve as the initial stress and strain for the deflection load simulation analysis.

[0026] Step 6: Continue simulation analysis of the 180-degree or 360-degree 3D model under the deflection load condition of the newly generated 180-degree 3D mesh;

[0027] Step 7: Finally, the simulation analysis and calculation of axial, torsional, and deflection multi-load conditions are completed.

[0028] The advantages of the present invention are:

[0029] The simulation analysis method for multi-layer, thin-walled rubber-metal composite rotor structures disclosed herein has the advantage of enabling simulation analysis of axial and torsional load conditions using a simple two-dimensional axisymmetric model, while also enabling simulation analysis of deflection and radial load conditions using 180-degree or 360-degree rotations. This significantly improves the analysis efficiency of multi-layer, thin-walled rubber-metal composite rotor structures. This method overcomes the shortcomings of existing simulation analysis methods for multi-layer, thin-walled rubber-metal composite rotor structures, which suffer from low analysis efficiency under multiple load conditions, including radial, axial, deflection, and torsional loads, as well as the difficulty of generating three-dimensional meshes, which can easily lead to computational non-convergence. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of an embodiment of a simulation analysis method applicable to a multi-layer thin-wall rubber-metal composite rotating body structure of the present invention;

[0031] Figure 2 Schematic diagram of a three-dimensional geometric model of a multi-layer thin-walled rubber-metal composite rotating body structure according to one embodiment of the present invention (complete 360-degree model);

[0032] Figure 3 Schematic diagram of a three-dimensional geometric model of a multi-layer thin-walled rubber-metal composite rotating body structure according to an embodiment of the present invention (270-degree model);

[0033] Figure 4 A two-dimensional axisymmetric cross-section of a multi-layer thin-wall rubber-metal composite rotating body structure according to an embodiment of the present invention;

[0034] Figure 5 A meshing model of a two-dimensional axisymmetric cross section according to an embodiment of the present invention;

[0035] Figure 6 According to one embodiment of the present invention, a three-dimensional mesh model is generated by rotating the mesh of an axisymmetric cross section by 180 degrees;

[0036] Figure 7 A stress contour diagram of a two-dimensional axisymmetric cross section after axial preloading according to an embodiment of the present invention;

[0037] Figure 8 A three-dimensional initial stress contour diagram of an axisymmetric cross section after rotation 180 degrees according to an embodiment of the present invention;

[0038] Figure 9 Strain contour diagram of a two-dimensional axisymmetric cross section after axial preloading according to an embodiment of the present invention;

[0039] Figure 10 A three-dimensional initial strain contour diagram of an axisymmetric cross section after rotation 180 degrees according to an embodiment of the present invention;

[0040] Figure 11 A three-dimensional stress contour diagram after simulation analysis based on a deflection load condition after rotating an axisymmetric section by 180 degrees according to an embodiment of the present invention;

[0041] Figure 12 A three-dimensional strain cloud diagram after simulation analysis based on a deflection load condition after an axisymmetric section is rotated 180 degrees according to an embodiment of the present invention.

[0042] Figure numbers: 1. Top plate; 2. Elastomer; 3. Metal partition; 4. Bottom plate; 5. Rubber; 6. Two-dimensional axisymmetric section; 7. Multi-layer thin-walled rubber-metal composite rubber stack. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] Example 1

[0045] By attaching Figure 1 and 2 It can be seen that the present invention relates to a simulation analysis method for a multi-layer thin-wall rubber metal composite rubber pile, wherein the multi-layer thin-wall rubber metal composite rubber / 7 comprises a top plate 1, a bottom plate 4 and an elastic body 2; the elastic body 2 is integrally vulcanized with the top plate 1 and the bottom plate 4, and the elastic body 2 is a composite member composed of a multi-layer rubber 5 and a metal partition 3 (as shown in the attached figure). Figure 2 As shown), symmetrically distributed along the central axis; first, cut the multi-layer thin-walled rubber metal composite rubber pile at the center and extract a two-dimensional axisymmetric section 6 (as shown in the attached Figure 3 and 4 ), and perform a two-dimensional meshing operation on this two-dimensional axisymmetric section 6 (as shown in the attached Figure 4 After extracting the 2D axisymmetric section, perform meshing on this section for the large deformation simulation analysis of rubber (see the attached figure). Figure 5 After completing the meshing of the 2D axisymmetric section, continue with the routine simulation analysis pre-processing work such as setting material properties and boundary conditions, apply axial or torsional loads suitable for the 2D axisymmetric section model, and perform simulation analysis. After the axial or torsional load simulation analysis is completed, rotate the 2D axisymmetric mesh 180 degrees to generate a 3D mesh (as shown in the attached figure). Figure 6 ), and the stress and strain results of the 2D axisymmetric model are simultaneously rotated 180 degrees and mapped onto the newly generated 180-degree 3D mesh, serving as the initial stress and strain for the deflection or radial load simulation analysis. Simultaneously, the 180-degree 3D model is simulated and analyzed under deflection or radial load conditions after axial or torsional preload, ultimately completing the simulation analysis of multiple axial, radial, torsional, and deflection load conditions.

[0046] The specific simulation analysis steps are as follows:

[0047] Step 1: Extract a two-dimensional axisymmetric section from the multi-layer thin-walled rubber-metal composite rubber stack structure and perform a two-dimensional meshing operation on this section;

[0048] Step 2: Perform mesh generation on this section based on the large deformation simulation analysis of rubber;

[0049] Step 3: After completing the meshing of the 2D axisymmetric cross section, continue with conventional simulation analysis pre-processing tasks such as setting material properties and boundary conditions. Since there is no torsional load on the multi-layer thin-walled rubber-metal composite rubber stack, only an axial load suitable for the 2D axisymmetric cross-section model is applied, and then simulation analysis calculations under the axial load are performed.

[0050] Step 4: After the axial load simulation analysis is completed, the 2D axisymmetric mesh is rotated 180 degrees to generate a 3D mesh. At the same time, the stress and strain results of the 2D axisymmetric model are also rotated 180 degrees and mapped onto the newly generated 180-degree 3D mesh to serve as the initial stress and strain for the deflection load simulation analysis.

[0051] Step 5: Continue with the simulation analysis of the 180-degree 3D model under the deflection load condition after axial preload;

[0052] Step 6: Finally, the simulation analysis and calculation of axial and deflection multi-load conditions are completed.

[0053] in:

[0054] In the step 1, the structural characteristics of the multi-layer thin-walled rubber metal composite rubber pile are first analyzed, and the multi-layer thin-walled rubber metal composite rubber pile is plane-cut in the radial direction along the central axis. The two-dimensional cross-section including the top plate and the bottom plate, as well as the rubber and the spacer is extracted, and a dwg file is generated and processed using Cad software. According to the calculation requirements, the two-dimensional cross-section is simplified to varying degrees. When calculating the stiffness performance, the profile cover rubber with a thickness of less than 1mm can be removed; when calculating the fatigue performance, the original design structure is maintained as much as possible. The processed two-dimensional cross-section is as follows: Figure 3 After winding, the stress cloud diagram of the two-dimensional axisymmetric section after axial preload is analyzed. The analysis results are shown in the attached Figure 6 shown.

[0055] In step 2, the two-dimensional cross section of the axisymmetric part is exported as a dxf file and imported into a finite element simulation software (such as ABAQUS) for meshing. When meshing, the mesh is divided into parts and the entire cross section is divided into multiple different meshes according to the stress conditions. Figure 4 As shown. You can also import the exported DXF format into HyperMesh software for meshing.

[0056] In step 3, according to the stress conditions of the multi-layer thin-walled rubber metal composite rubber pile, the material properties and boundary conditions are set and the two-dimensional axisymmetric grid model is simulated and analyzed to obtain the stress and strain results of the two-dimensional axisymmetric grid under axial preload, such as Figure 7 and Figure 9 shown.

[0057] In step 4, the revolve command of the ABAQUS software can be used to rotate the two-dimensional axisymmetric mesh by 180 degrees to generate a three-dimensional mesh as the initial mesh model for the deflection load condition simulation analysis. At the same time, the symmetric results transfer command can be used to synchronously rotate the stress and strain results of the two-dimensional axisymmetric model under the load condition in step 3 and map them to the newly generated 180-degree three-dimensional mesh as the initial stress and strain for the deflection load condition simulation analysis. Figure 8 and Figure 10 shown.

[0058] The simulation analysis under axial load and the 180-degree 3D model were performed using conventional simulation analysis methods. The simulation analysis included stress contour analysis of the 2D axisymmetric cross section after axial preload, 3D initial stress contour analysis of the 2D axisymmetric cross section after 180-degree rotation, strain contour analysis of the 2D axisymmetric cross section after axial preload, 3D initial strain contour analysis of the 180-degree rotation, 3D stress contour analysis of the 180-degree rotation axisymmetric cross section based on a deflection load condition, and 3D strain contour analysis of the 180-degree rotation axisymmetric cross section based on a deflection load condition.

[0059] The stress cloud diagram of the two-dimensional axisymmetric section after axial preload is shown in the attached figure. Figure 7 As shown;

[0060] The three-dimensional initial stress cloud diagram after the two-dimensional axisymmetric section is rotated 180 degrees is shown in the attached figure. Figure 8 As shown;

[0061] The strain cloud diagram of the two-dimensional axisymmetric section after axial preload is shown in the attached figure. Figure 9 As shown;

[0062] The three-dimensional initial strain cloud diagram after the axisymmetric section is rotated 180 degrees is shown in the attached figure. Figure 10 As shown;

[0063] The three-dimensional stress cloud diagram after the axisymmetric section is rotated 180 degrees and the simulation analysis based on the deflection load condition is shown in the attached figure. Figure 11 As shown;

[0064] The three-dimensional strain cloud diagram after the axisymmetric section is rotated 180 degrees and the simulation analysis based on the deflection load condition is shown in the attached figure. Figure 12 As shown;

[0065] Example 2

[0066] The principle of Example 2 is the same as that of Example 1, except that the component structure is slightly different. It involves a simulation analysis method for a multi-layer thin-walled rubber metal ball joint. First, the multi-layer thin-walled rubber metal ball joint is cut along the central axis to extract a two-dimensional axisymmetric section, and the two-dimensional axisymmetric section is used to perform a two-dimensional mesh division operation. After the two-dimensional axisymmetric section is extracted, the mesh division required for the large deformation simulation analysis of rubber is performed on this section. After the mesh division of the two-dimensional axisymmetric section is completed, the conventional simulation analysis pre-processing work such as setting material properties and boundary conditions is continued, and an axial or torsional load suitable for the two-dimensional axisymmetric section model is applied to perform simulation analysis calculations. After the axial or torsional load simulation analysis is completed, the two-dimensional axisymmetric mesh is rotated 360 degrees to generate a three-dimensional mesh, and at the same time, the stress and strain results of the two-dimensional axisymmetric model are also synchronously rotated 360 degrees and mapped on the newly generated 360-degree three-dimensional mesh as the initial stress and strain for the deflection or radial load working condition simulation analysis. The simulation analysis of the 360-degree three-dimensional model under deflection or radial load conditions after axial or torsional preload was continued, and finally the simulation analysis and calculation of axial, radial, torsional and deflection multi-load conditions were completed.

[0067] The simulation analysis of the multi-layer thin-walled rubber metal ball joint includes the following steps:

[0068] Step 1: Extract a 2D axisymmetric cross section from the multi-layer thin-walled rubber-metal composite rotating structure and perform a 2D meshing operation on this cross section;

[0069] Step 2: Perform mesh generation on this section based on the large deformation simulation analysis of rubber;

[0070] Step 3: After completing the meshing of the 2D axisymmetric section, continue with the conventional simulation analysis pre-processing work such as setting material properties and boundary conditions, apply an axial load suitable for the 2D axisymmetric section model, and then perform simulation analysis under the axial load;

[0071] Step 4: After the simulation analysis under axial or torsional load is completed, the 2D axisymmetric mesh is rotated 360 degrees to generate a 3D mesh. At the same time, the stress and strain results of the 2D axisymmetric model are also rotated 360 degrees and mapped onto the newly generated 360-degree 3D mesh to serve as the initial stress and strain for the deflection load simulation analysis.

[0072] Step 5: Continue simulation analysis of the 360-degree 3D model under the deflection load condition of the newly generated 360-degree 3D mesh;

[0073] Step 6: Finally, the simulation analysis and calculation of axial, torsional, and deflection multi-load conditions are completed.

[0074] The above-mentioned embodiments are only used to clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the present invention without substantially changing the technical content. At the same time, the structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0075] The advantages of the present invention are:

[0076] The simulation analysis method for multi-layer thin-walled rubber-metal composite rotating body structure involved in the present invention has the advantages of being able to realize the simulation analysis of axial and torsional load conditions with a simple two-dimensional axisymmetric model, and at the same time realizing the simulation analysis of deflection and radial load conditions by means of 180-degree or 360-degree rotation. This method can greatly improve the simulation analysis efficiency of multi-layer thin-walled rubber-metal composite rotating body structure under multiple load conditions such as radial, axial, deflection and torsion, and effectively overcome the low efficiency of conventional simulation analysis methods, which use axisymmetric models for axial and torsion calculations and 180-degree or 360-degree models for deflection and radial calculations, or use 360-degree models for all multiple load conditions such as axial, radial, deflection and torsion calculations. It has the following advantages:

[0077] 1. This method overcomes the shortcomings of existing simulation analysis methods for multi-layer thin-walled rubber-metal composite rotating structures, which have low simulation analysis efficiency under multiple load conditions such as radial, axial, deflection and torsion, and the difficulty of three-dimensional mesh generation technology, which is prone to calculation non-convergence defects;

[0078] 2. This method can effectively overcome the problem of using axisymmetric models for axial and torsional calculations in conventional simulation analysis methods;

[0079] 3. This method uses a 180-degree model or a 360-degree model for deflection and radial calculations, which can greatly reduce the workload of meshing. For complex symmetrical products, it can save more than 50% of the meshing time.

[0080] Glossary:

[0081] 1) Multi-layer thin-wall rubber-metal composite structure: including rubber-metal composite products with multiple layers of rubber and multiple layers of separators;

[0082] 2) Rotational structure: In engineering applications, it is also called an axisymmetric model, which means that the three-dimensional model of the product can be rotated 360 degrees around the central axis through a certain section, covering products such as rubber ball joints, rubber bushings, rubber nodes, and conical springs.

Claims

1. A simulation analysis method for a multi-layer thin-walled rubber-metal composite rotating structure, characterized by: First, a two-dimensional mesh division operation is performed on the multi-layer thin-walled rubber-metal composite rotating body; after the mesh division of the two-dimensional axisymmetric section is completed, an axial or torsional load simulation analysis and calculation is performed; after the axial or torsional load simulation analysis is completed, the two-dimensional axisymmetric mesh is transformed into a three-dimensional mesh, and at the same time, the stress and strain results of the two-dimensional axisymmetric model are also synchronously mapped on the newly generated three-dimensional mesh as the initial stress and strain of the deflection or radial load working condition simulation analysis; then the three-dimensional model simulation analysis under the deflection or radial load working condition after axial or torsional preload is continued, and finally the axial, radial, torsional and deflection multi-load working condition simulation analysis and calculation are completed; the three-dimensional model simulation analysis under the deflection or radial load working condition after axial or torsional preload is an axial or torsional load simulation analysis. After the true analysis is completed, there is axial preload; the two-dimensional axisymmetric grid is rotated 180 degrees or 360 degrees to generate a three-dimensional grid, and at the same time, the stress and strain results of the two-dimensional axisymmetric model are also synchronously rotated 180 degrees or 360 degrees and mapped on the newly generated 180-degree or 360-degree three-dimensional grid as the initial stress and strain of the deflection or radial load simulation analysis, and the simulation analysis of the 180-degree or 360-degree three-dimensional model under the deflection or radial load condition after axial or torsional preload is continued, and finally the simulation analysis calculation of axial, radial, torsional and deflection multiple load conditions is completed; there is no axial preload; the two-dimensional axisymmetric section model is rotated 180 degrees or 360 degrees, and the three-dimensional grid is generated before the simulation analysis based on the radial or deflection load condition is performed.

2. The simulation analysis method for a multi-layer thin-walled rubber-metal composite rotating structure according to claim 1, characterized in that: The two-dimensional meshing operation is to first extract a two-dimensional axisymmetric section from the multi-layer thin-walled rubber-metal composite rotating body structure, and then use this section to perform a two-dimensional meshing operation; the two-dimensional meshing operation is to extract the two-dimensional axisymmetric section and then perform the meshing required for the large deformation simulation analysis of rubber on this section.

3. The simulation analysis method for a multi-layer thin-walled rubber-metal composite rotating structure according to claim 2, characterized in that: The mesh generation adopts the finite element mesh generation method. When the finite element method is used for structural analysis, the structure must first be discretized to form a finite element mesh, and various information corresponding to the mesh is given.

4. The simulation analysis method of the multi-layer thin-walled rubber-metal composite rotating structure according to claim 3, characterized in that: The various information includes unit information, node coordinates, material information, constraint information and load information; the load information includes deflection load, radial load, axial load or torsional load information.

5. The simulation analysis method of the multi-layer thin-walled rubber-metal composite rotating structure according to claim 3, characterized in that: The discretization of the structure is to discretize the boundary curve, that is, to arrange points on the boundary according to the requirements of the density control function; the formation of the finite element mesh is to generate units in the target area, generate units and nodes according to specific circumstances, and divide them into boundary unit division and internal unit division; and use various information to optimize the finally generated mesh units.

6. The simulation analysis method of the multi-layer thin-walled rubber-metal composite rotating structure according to claim 1, characterized in that: The axial or torsional load simulation analysis calculation is to complete the mesh division of the two-dimensional axisymmetric section, continue to set the material properties, boundary conditions and other conventional simulation analysis pre-processing work, apply the axial or torsional load suitable for the two-dimensional axisymmetric section model, and perform simulation analysis on the two-dimensional axisymmetric section model based on the axial or torsional load.

7. The simulation analysis method of the multi-layer thin-walled rubber-metal composite rotating structure according to claim 6, characterized in that: When performing simulation analysis based on axial or torsional load on the two-dimensional axisymmetric cross-section model, it is determined whether the radial or deflection load has an axial preload, and different three-dimensional model simulation analyses are performed according to whether there is an axial preload.

8. The simulation analysis method for a multi-layer thin-walled rubber-metal composite rotating structure according to claim 1, characterized in that: The three-dimensional model simulation analysis under deflection or radial load conditions after axial or torsional preload is performed after the axial or torsional load simulation analysis is completed without axial preload; the two-dimensional axisymmetric section model is rotated 180 degrees or 360 degrees, and a three-dimensional mesh is generated before a simulation analysis based on radial or deflection load conditions is performed.

9. The simulation analysis method of the multi-layer thin-walled rubber-metal composite rotating structure according to claim 1, characterized in that: The simulation analysis method of the multi-layer thin-wall rubber-metal composite rotating body structure includes the following steps: Step 1: Perform a two-dimensional axisymmetric analysis on the multi-layer thin-walled rubber-metal composite body of revolution to be meshed, and select a two-dimensional axisymmetric section; Step 2: Extract a 2D axisymmetric cross section from the multi-layer thin-walled rubber-metal composite body of revolution and perform a 2D meshing operation on this cross section. Perform meshing on this cross section for large rubber deformation simulation analysis. Generate a 2D mesh on this 2D axisymmetric cross section that is conducive to large rubber deformation. Step 3: After completing the meshing of the 2D axisymmetric section, continue with the routine simulation analysis pre-processing work such as setting material properties and boundary conditions; Step 4: Perform simulation analysis based on axial or torsional loads on the two-dimensional axisymmetric cross-section model; apply axial or torsional loads suitable for the two-dimensional axisymmetric cross-section model, and then perform simulation analysis calculations under the axial or torsional loads; Step 5: After the simulation analysis under axial or torsional load is completed, the 2D axisymmetric mesh is rotated 180 degrees or 360 degrees to generate a 3D mesh. At the same time, the stress and strain results of the 2D axisymmetric model are also rotated 180 degrees or 360 degrees and mapped onto the newly generated 180-degree or 360-degree 3D mesh to serve as the initial stress and strain for the deflection load simulation analysis. Step 6: Continue simulation analysis of the 180-degree or 360-degree 3D model under the deflection load condition of the newly generated 180-degree 3D mesh; Step 7: Finally, the simulation analysis and calculation of axial, torsional, and deflection multi-load conditions are completed.

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