Rubber buffer rigidity curve determination method and related equipment

Abstract

The invention discloses a rubber buffer rigidity curve determination method and related equipment, and relates to the technical field of analog simulation, and the method comprises the steps: obtaining a rubber part model corresponding to a rubber buffer; determining a rubber body structure unit corresponding to the rubber buffer part based on the geometric surface of the rubber part model; the rubber body structure unit is subjected to simulation definition operation and then subjected to analogue simulation to obtain an output result, the simulation definition operation comprises the steps that static analysis of geometric nonlinearity is established, and the rubber compression state of the rubber body structure unit in the analogue simulation process comprises a linear stage and a nonlinear stage; based on the output result, the rigidity curve of the rubber buffer part is determined, and the output result comprises the loading displacement and the bearing reaction output. By means of accurate modeling, nonlinear behavior consideration, comprehensive simulation data analysis and the like, accurate determination of the rigidity curve of the rubber buffer part is realized, and the rigidity curve simulation precision of the rubber buffer part is improved.

Description

Technical Field

[0001] The present invention relates to the field of simulation technology, and more specifically, to a method for determining a stiffness curve of a rubber buffer and related equipment. Background Art

[0002] With the continuous advancement of industrial technology, rubber buffers, as important vibration and noise reduction components, have been widely used in the fields of automobiles, aerospace, rail transportation, construction engineering, etc. However, the complex working environment of rubber buffers makes it particularly difficult to accurately predict their stiffness. Therefore, the research and development and application of rubber buffer stiffness simulation technology is particularly important.

[0003] In the related art, the stiffness simulation of rubber buffers usually relies on the calculation of linear stiffness. Although linear stiffness analysis is simple and fast, it fails to fully capture the complex nonlinear response of rubber parts under different load and deformation conditions. This simplified processing method often ignores the design evaluation of nonlinear segment curves, which leads to the simulation results being unable to fully and accurately predict the behavior of rubber buffers in actual applications. Especially in the structural selection and design stage, this limitation may lead to a large deviation between the design goal and the actual performance. In other words, there is a technical problem of low precision in the stiffness curve simulation of rubber buffers in the related art. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In a first aspect, the present application provides a method for determining a stiffness curve of a rubber buffer, comprising:

[0006] Obtaining a rubber component model corresponding to the rubber buffer component;

[0007] Determining a rubber body structural unit corresponding to the rubber buffer component based on a geometric surface of the rubber component model;

[0008] After performing a simulation definition operation on the rubber body structural unit, a simulation is performed to obtain an output result, wherein the simulation definition operation includes: creating a geometrically nonlinear static analysis step, and during the simulation process, the rubber compression state of the rubber body structural unit includes a linear stage and a nonlinear stage;

[0009] Based on the output result, a stiffness curve of the rubber buffer is determined, wherein the output result includes a loading displacement and a support reaction force output.

[0010] In a feasible implementation manner, the simulation definition operation further includes:

[0011] A first reference point and a second reference point in the rubber component structural unit are defined, wherein the first reference point is a position in the rubber component structural unit for receiving a load, and the second reference point is a position in the rubber component structural unit where displacement is restricted.

[0012] In a feasible implementation manner, the simulation definition operation further includes:

[0013] Setting a displacement constraint on the first reference point, and establishing a coupling constraint between the first reference point and a first reference region, wherein the first reference region is a region connected to the first reference point and used to receive a load transmitted by the first reference point;

[0014] A fixed constraint is set on the second reference point, and a coupling constraint is established between the second reference point and a second reference area, wherein the second reference area is an area connected to the second reference point and affected by the fixed constraint.

[0015] In a feasible implementation manner, the simulation definition operation further includes:

[0016] A contact relationship between the rubber bumper and the rubber main spring in the rubber component structural unit is defined.

[0017] In a feasible implementation manner, in the case of a diameter reduction process, before performing the simulation, the method for determining the stiffness curve of the rubber buffer further includes:

[0018] Defining a cylindrical coordinate system of the rubber body structural unit;

[0019] Based on the cylindrical coordinate system, the outer bonding surface of the rubber body structural unit is compressed along the radial direction toward the center of the circle through a diameter reduction simulation step;

[0020] A displacement variable is applied to the first reference point through a load simulation step.

[0021] In a feasible implementation manner, the determining of the rubber body structural unit corresponding to the rubber buffer component based on the geometric surface of the rubber component model includes:

[0022] Performing surface extraction on the rubber component model by using finite element pre-processing software to obtain a geometric surface of the rubber component model;

[0023] Performing mesh generation processing on the geometric surface to obtain rubber body mesh units;

[0024] The rubber body grid unit is subjected to hybridization conversion to obtain a rubber body structural unit corresponding to the rubber buffer.

[0025] In a feasible implementation manner, when the rubber body grid unit is a hexahedral grid, the rubber body structural unit is C3D8H;

[0026] When the rubber body grid unit is a tetrahedral grid, the rubber body structural unit is C3D4H.

[0027] In a second aspect, the present application further provides a device for determining a stiffness curve of a rubber buffer, comprising:

[0028] An acquisition unit, used for acquiring a rubber component model corresponding to the rubber buffer component;

[0029] A structure determination unit, used for determining a rubber body structure unit corresponding to the rubber buffer component based on a geometric surface of the rubber component model;

[0030] A simulation unit, used for performing simulation definition operation on the rubber body structure unit and then performing simulation to obtain output results, wherein the simulation definition operation includes: creating a geometrically nonlinear static analysis step, and during the simulation process, the rubber compression state of the rubber body structure unit includes a linear stage and a nonlinear stage;

[0031] The stiffness curve determining unit is used to determine the stiffness curve of the rubber buffer component based on the output result, wherein the output result includes the loading displacement and the support reaction force output.

[0032] In a third aspect, the present application further provides an electronic device, comprising: a memory and a processor, characterized in that the processor is used to implement the steps of the method for determining the stiffness curve of the rubber buffer described in the first aspect when executing the computer program stored in the memory.

[0033] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method for determining the stiffness curve of a rubber buffer component described in the first aspect are implemented.

[0034] In summary, on the one hand, the present application can accurately simulate the physical properties of the rubber material by constructing a rubber part model corresponding to the rubber buffer and defining the rubber body structural unit based on the geometric surface of the rubber part model, and thus can more accurately reflect the behavior of the rubber buffer under different compression states, thereby improving the accuracy of the stiffness curve determination; on the other hand, in the simulation definition operation, a geometrically nonlinear static analysis step is created, which fully considers the linear and nonlinear stages of the rubber body structural unit during the compression process, and can more realistically reflect the actual working conditions of the rubber buffer, so that the determination of the stiffness curve is closer to the actual situation; and, the loading displacement and support reaction force output obtained through simulation provide a comprehensive basis for the determination of the stiffness curve, wherein the loading displacement reflects the deformation of the rubber buffer under different loading conditions, and the support reaction force represents the response of the rubber buffer to the external load, and the comprehensive analysis of these data can more comprehensively reflect the mechanical properties of the rubber buffer. In summary, the method for determining the stiffness curve of rubber buffers provided in this application achieves accurate determination of the stiffness curve of rubber buffers through precise modeling, consideration of nonlinear behavior and comprehensive simulation data analysis, providing strong support for the design, optimization and production of rubber buffers. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0036] Figure 1 A schematic flow chart of a method for determining a stiffness curve of a rubber buffer provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a stiffness curve and a physical test curve provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the structure of a rubber buffer provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of a device for determining a stiffness curve of a rubber buffer provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "is" and "has" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] See also Figure 1 , Figure 1 1 is a flow chart of a method for determining a stiffness curve of a rubber buffer provided in an embodiment of the present application. The method may specifically include the following steps 101 to 104:

[0043] Step 101, obtaining a rubber component model corresponding to the rubber buffer component;

[0044] Specifically, first, the dimensional parameters of the rubber buffer, including diameter, height, and any special shape features, can be obtained from production drawings or 3D scanning data; then, CAD software (such as SolidWorks or AutoCAD) or other modeling software can be used to create a model and enter specific dimensional values. For example, if the diameter of the rubber buffer is 30 mm and the height is 50 mm, these values ​​can be entered in the modeling software to build the rubber part model; next, according to the material properties of the rubber (such as elastic modulus, Poisson's ratio, etc.), the corresponding material parameters are set in the rubber part model; finally, the rubber part model is saved for subsequent simulation analysis and emulation.

[0045] For example, if the rubber bumper is the top of a shock absorber for a suspension system, then you need to obtain a rubber model with the same shape and size. The rubber model can be a simple cylinder or a more complex geometry, depending on the actual bumper design.

[0046] Step 102, determining a rubber body structural unit corresponding to the rubber buffer component based on a geometric surface of the rubber component model;

[0047] Specifically, the geometric surface of the rubber part model can be extracted using finite element pre-processing software, and then the geometric surface can be meshed to generate a 3D network; the 3D network is then saved as an INP format file and imported into the engineering simulation finite element software, so that the 3D network is converted into a hybrid unit through the engineering simulation finite element software, and the hybrid unit is the rubber body structural unit.

[0048] By constructing a rubber component model corresponding to the rubber buffer component through step 102 and defining the rubber body structural unit based on the geometric surface of the rubber component model, the physical properties of the rubber material can be accurately simulated, and the behavior of the rubber buffer component under different compression states can be more accurately reflected, thereby improving the accuracy of the stiffness curve determination.

[0049] Step 103, performing simulation definition operation on the rubber body structural unit and then performing simulation to obtain output results, wherein the simulation definition operation includes: creating a geometrically nonlinear static analysis step, and the rubber compression state of the rubber body structural unit during the simulation process includes a linear stage and a nonlinear stage;

[0050] Specifically, geometric nonlinear analysis is an analysis method that considers the significant changes in the shape or size of the structure during loading. For the rubber body structural unit of the rubber buffer, since the behavior of the rubber buffer under large deformation significantly deviates from the linear relationship, the geometric nonlinear analysis method can be used to accurately simulate its stress behavior. In the engineering simulation finite element software, this can be achieved by creating a specific analysis step (Analysis Step), which is configured to consider the influence of geometric nonlinearity. After completing the simulation definition operation, the engineering simulation finite element software will simulate the rubber body structural unit according to the predetermined steps and parameters. During the simulation process, the physical quantities such as stress, strain, displacement, etc. of the rubber body under different compression states will be calculated, and output results will be generated based on these calculation results. These output results can be used to evaluate the mechanical properties of the rubber body structural unit, predict its behavior under different working conditions, and provide data support for optimization design.

[0051] Through step 103, a geometrically nonlinear static analysis step is created in the simulation definition operation, which fully considers the linear stage and nonlinear stage of the rubber body structural unit during the compression process, can more truly reflect the actual working condition of the rubber buffer, and makes the determination of the stiffness curve closer to the actual situation.

[0052] Step 104, determining a stiffness curve of the rubber buffer based on the output result, wherein the output result includes a loading displacement and a support reaction force output;

[0053] Specifically, the loading displacement and support reaction force data obtained by the simulation in step 103 can be extracted. Then, the data are processed to draw a relationship diagram between force and displacement; then, by fitting these data points, a stiffness curve of the rubber buffer is constructed, and the stiffness curve is usually represented by a graph of force (ordinate) versus displacement (abscissa).

[0054] For example, Figure 2 The stiffness curve and the actual test curve are obtained by the method for determining the stiffness curve of the rubber buffer provided in the embodiment of the present application.

[0055] It should be noted that the loading displacement reflects the deformation of the rubber buffer under different loading conditions, while the support reaction force represents the response of the rubber buffer to the external load. The comprehensive analysis of these data in step 104 can more comprehensively reflect the mechanical properties of the rubber buffer.

[0056] In some examples, the simulation definition operation may further include: defining a first reference point and a second reference point in the rubber member structural unit, wherein the first reference point is a position in the rubber member structural unit for receiving a load, and the second reference point is a position in the rubber member structural unit where displacement is restricted.

[0057] Specifically, the first reference point is set as the position in the rubber component structural unit for receiving the load; during the simulation process, all external forces or displacements applied to the rubber buffer will be transmitted through this first reference point. The second reference point is the position in the rubber component structural unit where the displacement is restricted. In the simulation, all degrees of freedom of this point (such as displacement and rotation in the X, Y, and Z directions) may be set to zero to simulate the situation where the rubber buffer is fixed or constrained in actual application. The first reference point (loading point) and the second reference point (constraint point) can be determined based on the fixing method and force method of the rubber buffer under actual working conditions.

[0058] For example, if the rubber buffer is used for shock absorption, the first reference point can be located on the surface that is in direct contact with the earthquake source; if the rubber component is used for a supporting structure, the first reference point can be located at the point connected to the supporting structure; if one end of the rubber buffer is fixed to a certain structure, then the fixed point can be used as the second reference point; if the rubber component is restricted to a certain spatial range in some way, then the boundary that limits its displacement can also serve as the basis for the second reference point.

[0059] Through the implementation of the above examples, it can be ensured that the first reference point and the second reference point in the simulation definition operation can accurately reflect the force conditions and boundary constraints of the rubber buffer under the actual working state, thereby providing a reliable basis for subsequent simulation.

[0060] In some examples, the simulation definition operation may also include: setting a displacement constraint on a first reference point, and establishing a coupling constraint between the first reference point and a first reference area, wherein the first reference area is an area connected to the first reference point and used to receive the load transmitted by the first reference point; setting a fixed constraint on a second reference point, and establishing a coupling constraint between the second reference point and the second reference area, wherein the second reference area is an area connected to the second reference point and affected by the fixed constraint.

[0061] Specifically, on the one hand, a displacement constraint is set on the first reference point, and the displacement of the first reference point will be controlled within a specific range at a certain stage or throughout the simulation process; then a coupling constraint is established between the first reference point and the first reference area; the first reference area is an area that is closely connected to the first reference point and is expected to receive and transfer the load applied or received by the first reference point; the coupling constraint can ensure that during the simulation process, the displacement (or load) of the first reference point can be accurately transferred to the first reference area, so that the nodes or units of the first reference area move or deform synchronously with the first reference point. On the other hand, a fixed constraint is set on the second reference point, and during the simulation process, all degrees of freedom of the second reference point are restricted to zero, simulating the situation where the rubber part is firmly fixed in actual application; then a coupling constraint is established between the second reference point and the second reference area; the second reference area is an area connected to the second reference point and affected by the fixed constraint; the coupling constraint can ensure that the fixed state of the second reference point can be transferred to the entire second reference area, thereby accurately simulating the rigid behavior of the fixed part of the rubber part in actual application.

[0062] Through the implementation of the above examples, it can be ensured that the simulation definition operation can accurately reflect the force conditions and boundary constraints of the rubber component structural unit under the actual working state, thereby providing a reliable basis for subsequent simulation.

[0063] In some examples, the simulation definition operation may further include: defining a contact relationship between a rubber bumper and a rubber main spring in the rubber component structural unit.

[0064] Specifically, when simulating a rubber buffer including a rubber bumper and a rubber main spring, the initial stage of the simulation is a linear segment, the rubber bumper is not compressed, the force and displacement are basically linear, and the stiffness is mainly provided by the rubber main spring; as the compression displacement increases, the rubber bumper will be contact compressed, and the stiffness is provided by the rubber main spring and the compression of the rubber bumper. The slope of the stiffness curve increases, and the nonlinear segment is entered at this time. The rubber bodies squeeze and compress each other, and it is necessary to define the contact relationship between the contact surface of the rubber bumper and the rubber main spring to simulate the deformation of the rubber bumper during compression. The main surface can select the surface with greater stiffness, and the secondary surface can select the surface with less stiffness. At the same time, the contact properties are defined. The contact properties may include the friction coefficient (used to describe the friction between the contact surfaces), the contact stiffness (affecting the transmission speed of the contact force), and the separation distance (used to determine whether the two objects have been separated).

[0065] For example, a bushing-shaped suspension rubber buffer is used as an example. Figure 3 As shown, the rubber main spring and the rubber bumper in the rubber buffer are shown in the figure.

[0066] Through the implementation of the above examples, it can be further ensured that the simulation definition operation can accurately reflect the contact relationship between the rubber bumper and the rubber main spring, so as to ensure that the simulation results can truly reflect the mechanical behavior of the rubber part under the actual working state.

[0067] In some examples, in the presence of a shrinking process, before performing a simulation, the method for determining the stiffness curve of the rubber buffer may also include: defining a cylindrical coordinate system of the rubber body structural unit; based on the cylindrical coordinate system, compressing the external bonding surface of the rubber body structural unit radially toward the center of the circle through a shrinking simulation step; and applying a displacement variable to the first reference point through a load simulation step.

[0068] Specifically, the origin and the axial direction can be selected first, and the radial and circumferential directions of the rubber body structural unit can be defined in order to accurately describe the shrinking operation; then, in the cylindrical coordinate system, the shrinking parameters are set, and the radial compression simulation is performed on the external bonding surface of the rubber body, and the mechanical response during the process is recorded; finally, after the shrinking, the displacement variable is applied to the first reference point of the rubber body to simulate the actual force condition, and the mechanical response is calculated and recorded.

[0069] By implementing the above examples, the cylindrical coordinate system is defined, and the reduction simulation step and the load simulation step are executed. This can systematically simulate the mechanical behavior of the rubber buffer during the reduction process and the subsequent force-bearing process, thereby accurately determining its stiffness curve.

[0070] In some examples, the aforementioned step 102 may include: performing surface extraction on the rubber part model through finite element pre-processing software to obtain a geometric surface of the rubber part model; performing mesh generation processing on the geometric surface to obtain rubber body mesh units; and performing hybridization conversion on the rubber body mesh units to obtain rubber body structural units corresponding to the rubber buffer.

[0071] Specifically, first, the rubber part model is imported into the finite element pre-processing software hypermesh, and the geometric surface of the rubber body is accurately extracted through hypermesh, and the points and lines of the surface are carefully edited using the geometric cleaning tool to ensure that all details are accurate, laying a solid foundation for subsequent high-quality mesh division; then, the cleaned geometric surface is divided into surface meshes, and then the surface mesh inspection tool is used for comprehensive scanning to accurately identify and correct poor quality meshes to ensure that each part reaches the optimal state; after the optimization is confirmed to be correct, high-quality rubber body mesh units (3D meshes) are further generated, and hexahedral meshes are preferred to ensure accuracy, but tetrahedral meshes can also be flexibly used in complex areas to adapt to shape changes; after the mesh quality is strictly checked to ensure that all standards are met, the rubber body mesh units are then output in the INP file format; finally, the INP file is imported into the engineering simulation finite element software ABAQUS to convert the rubber body mesh units into hybrid units.

[0072] In some examples, when the rubber body mesh unit is a hexahedral mesh, the rubber body structural unit is C3D8H; when the rubber body mesh unit is a tetrahedral mesh, the rubber body structural unit is C3D4H.

[0073] Specifically, the C3D8H unit can provide more uniform stress distribution and more accurate strain calculation due to its hexahedral structure, while the C3D4H unit can adapt to more complex geometric shapes, both of which help improve the accuracy of simulation. In addition, for the rubber hyperelastic model parameters in these two rubber structure units, mooney-rivlin parameters or ogden parameters can be selected.

[0074] Through the implementation of the above examples, the use of C3D8H units and C3D4H units can select the appropriate unit type according to specific design requirements and geometric shapes, thereby achieving accurate simulation of different scenarios. Achieving high-precision simulation, thereby improving the reliability and safety of the design.

[0075] In summary, on the one hand, the present application can accurately simulate the physical properties of the rubber material by constructing a rubber part model corresponding to the rubber buffer and defining the rubber body structural unit based on the geometric surface of the rubber part model, and thus can more accurately reflect the behavior of the rubber buffer under different compression states, thereby improving the accuracy of the stiffness curve determination; on the other hand, in the simulation definition operation, a geometrically nonlinear static analysis step is created, which fully considers the linear and nonlinear stages of the rubber body structural unit during the compression process, and can more realistically reflect the actual working conditions of the rubber buffer, so that the determination of the stiffness curve is closer to the actual situation; and, the loading displacement and support reaction force output obtained through simulation provide a comprehensive basis for the determination of the stiffness curve, wherein the loading displacement reflects the deformation of the rubber buffer under different loading conditions, and the support reaction force represents the response of the rubber buffer to the external load, and the comprehensive analysis of these data can more comprehensively reflect the mechanical properties of the rubber buffer. In summary, the method for determining the stiffness curve of a rubber buffer provided in the present application achieves accurate determination of the stiffness curve of a rubber buffer by means of precise modeling, consideration of nonlinear behavior, and comprehensive simulation data analysis, thereby improving the simulation accuracy of the stiffness curve of the rubber buffer.

[0076] Furthermore, as an implementation of the aforementioned method embodiment, the present application also provides a device for determining a stiffness curve of a rubber buffer, which is used to implement the aforementioned method embodiment. The device embodiment corresponds to the aforementioned method embodiment. For ease of reading, the present device embodiment for determining a stiffness curve of a rubber buffer will no longer repeat the details of the aforementioned method embodiment one by one, but it should be clear that the device in the embodiment of the present application can correspond to and implement all the contents of the aforementioned method embodiment. Figure 4 As shown, the rubber buffer stiffness curve determination device 20 includes: an acquisition unit 201, a structure determination unit 202, a simulation unit 203 and a stiffness curve determination unit 204, wherein the acquisition unit 201 is used to acquire a rubber component model corresponding to the rubber buffer; the structure determination unit 202 is used to determine a rubber body structural unit corresponding to the rubber buffer based on a geometric surface of the rubber component model; the simulation unit 203 is used to perform a simulation definition operation on the rubber body structural unit and then perform a simulation to obtain an output result, wherein the simulation definition operation includes: creating a geometrically nonlinear static analysis step, and the rubber compression state of the rubber body structural unit during the simulation process includes a linear stage and a nonlinear stage; the stiffness curve determination unit 204 is used to determine the stiffness curve of the rubber buffer based on the output result, wherein the output result includes a loading displacement and a support reaction force output.

[0077] In some examples, the simulation unit 203 is further used to define a first reference point and a second reference point in the rubber structure unit, wherein the first reference point is a position in the rubber structure unit for receiving a load, and the second reference point is a position in the rubber structure unit where displacement is restricted.

[0078] In some examples, the simulation unit 203 is also used to set a displacement constraint on the first reference point and establish a coupling constraint between the first reference point and a first reference area, wherein the first reference area is an area connected to the first reference point and used to receive the load transmitted by the first reference point; set a fixed constraint on the second reference point and establish a coupling constraint between the second reference point and the second reference area, wherein the second reference area is an area connected to the second reference point and affected by the fixed constraint.

[0079] In some examples, the simulation unit 203 is also used to define the contact relationship between the rubber bumper and the rubber main spring in the rubber component structure unit.

[0080] In some examples, when there is a shrinking process, before performing the simulation, the simulation unit 203 is also used to define a cylindrical coordinate system of the rubber body structure unit; based on the cylindrical coordinate system, the outer bonding surface of the rubber body structure unit is compressed radially toward the center of the circle through a shrinking simulation step; and a displacement variable is applied to the first reference point through a load simulation step.

[0081] In some examples, the structure determination unit 202 is also used to perform surface extraction on the rubber part model through finite element pre-processing software to obtain the geometric surface of the rubber part model; perform mesh generation processing on the geometric surface to obtain rubber body mesh units; and perform hybridization conversion on the rubber body mesh units to obtain rubber body structural units corresponding to the rubber buffer.

[0082] In some examples, when the rubber body mesh unit is a hexahedral mesh, the rubber body structural unit is C3D8H; when the rubber body mesh unit is a tetrahedral mesh, the rubber body structural unit is C3D4H.

[0083] The present application also provides a computer-readable storage medium, which stores computer-executable instructions or computer programs. When the computer-executable instructions or computer programs are executed by a processor, the processor will be caused to execute any step of the method for determining the stiffness curve of a rubber buffer provided in the present application.

[0084] In some examples, the computer-readable storage medium may be a memory such as RAM, read-only memory (ROM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); or it may be various devices including one or any combination of the above memories.

[0085] In some examples, computer-executable instructions may be in the form of a program, software, software module, script, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.

[0086] In some examples, computer-executable instructions may, but do not necessarily, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, for example, in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions).

[0087] In some examples, computer-executable instructions may be deployed to be executed on one electronic device, or on multiple electronic devices located at one site, or on multiple electronic devices distributed across multiple sites and interconnected by a communication network.

[0088] like Figure 5 As shown, the present application also provides an electronic device 30, including a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor, and when the processor 320 executes the computer program 311, any step of the above-mentioned method for determining the stiffness curve of the rubber buffer is implemented.

[0089] The present application also provides a computer program product, which includes a computer program or a computer executable instruction, and the computer program or the computer executable instruction is stored in a computer readable storage medium. The processor of the electronic device reads the computer program or the computer executable instruction from the computer readable storage medium, and the processor executes the computer program or the computer executable instruction, so that the electronic device executes any step of the rubber buffer stiffness curve determination method described above in the present application.

[0090] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for determining a rubber buffer stiffness curve, characterized in that: include: Obtaining a rubber component model corresponding to the rubber buffer component; Determining a rubber body structural unit corresponding to the rubber buffer component based on a geometric surface of the rubber component model; Performing a simulation definition operation on the rubber body structural unit and then performing a simulation to obtain an output result, wherein the simulation definition operation includes: creating a geometrically nonlinear static analysis step, and during the simulation, the rubber compression state of the rubber body structural unit includes a linear stage and a nonlinear stage; Based on the output result, a stiffness curve of the rubber buffer is determined, wherein the output result includes a loading displacement and a support reaction force output.

2. The method for determining the stiffness curve of a rubber buffer according to claim 1, wherein: The simulation definition operation further includes: A first reference point and a second reference point are defined in the rubber component structure unit, wherein the first reference point is a position in the rubber component structure unit for receiving a load, and the second reference point is a position in the rubber component structure unit where displacement is restricted.

3. The method for determining the stiffness curve of a rubber buffer according to claim 2, wherein: The simulation definition operation further includes: Setting a displacement constraint on the first reference point and establishing a coupling constraint between the first reference point and a first reference region, wherein the first reference region is a region connected to the first reference point and configured to receive a load transmitted by the first reference point; A fixed constraint is set on the second reference point, and a coupling constraint is established between the second reference point and a second reference region, wherein the second reference region is a region connected to the second reference point and affected by the fixed constraint.

4. The method for determining the stiffness curve of a rubber buffer according to claim 3, wherein: The simulation definition operation further includes: A contact relationship between the rubber bumper and the rubber main spring in the rubber component structural unit is defined.

5. The method for determining the stiffness curve of a rubber buffer according to claim 2, wherein: In the case where a diameter reduction process is present, before performing the simulation, the method for determining the stiffness curve of the rubber buffer further includes: Defining a cylindrical coordinate system of the rubber body structural unit; Based on the cylindrical coordinate system, compressing the outer bonding surface of the rubber body structural unit along the radial direction toward the center of the circle through a reduction simulation step; A displacement variable is applied to the first reference point through a load simulation step.

6. The method for determining the stiffness curve of a rubber buffer according to claim 1, wherein: The step of determining a rubber body structural unit corresponding to the rubber buffer component based on a geometric surface of the rubber component model includes: Performing surface extraction on the rubber part model using finite element pre-processing software to obtain a geometric surface of the rubber part model; Performing mesh generation processing on the geometric surface to obtain rubber body mesh units; The rubber body grid units are subjected to hybridization conversion to obtain rubber body structural units corresponding to the rubber buffer.

7. The method for determining the stiffness curve of a rubber buffer according to claim 6, wherein: When the rubber body grid unit is a hexahedral grid, the rubber body structural unit is C3D8H; When the rubber body grid unit is a tetrahedral grid, the rubber body structural unit is C3D4H.

8. A device for determining a stiffness curve of a rubber buffer, characterized in that: include: An acquiring unit, configured to acquire a rubber component model corresponding to the rubber buffer component; a structure determining unit, configured to determine a rubber body structure unit corresponding to the rubber buffer component based on a geometric surface of the rubber component model; A simulation unit is configured to perform a simulation definition operation on the rubber body structural unit and then perform simulation to obtain an output result, wherein the simulation definition operation includes: creating a geometrically nonlinear static analysis step, and during the simulation process, the rubber compression state of the rubber body structural unit includes a linear stage and a nonlinear stage; A stiffness curve determining unit is used to determine the stiffness curve of the rubber buffer based on the output result, wherein the output result includes the loading displacement and the support reaction force output.

9. An electronic device comprising: A memory and a processor, wherein the processor is configured to implement the steps of the method for determining the stiffness curve of a rubber buffer according to any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the stiffness curve of a rubber buffer according to any one of claims 1 to 7 are implemented.

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