Flat spring modeling method, system, computer and readable storage medium

Abstract

The application discloses a leaf spring modeling method, system, computer and readable storage medium. The method comprises the following steps: obtaining three-dimensional data of a leaf spring and fitting surface data between each leaf spring sheet of the leaf spring; establishing a finite element model of the leaf spring by using a hexahedron unit; connecting each leaf spring sheet in a unit common node mode according to the fitting surface data; calculating a static stiffness value of the leaf spring and judging whether the leaf spring meets a preset condition; and if yes, determining that the leaf spring modeling is completed. The application has the beneficial effect that: by using the above method to analyze and test the static stiffness of the leaf spring of the suspension system, the grid method is used to model the finite element of the leaf spring sheet, so that the simulation effect is more in line with the actual test working condition, and the simulation value of the static stiffness of the leaf spring is more accurate.

Description

Technical Field

[0001] This invention relates to the field of vehicle suspension control system technology, and in particular to a leaf spring modeling method, system, computer, and readable storage medium. Background Technology

[0002] With the government's policy of allowing pickup trucks to enter cities, the usage rate of cargo trucks is increasing, and cargo truck systems generally use leaf spring suspension systems. Accurate modeling of leaf springs during the design and development process is crucial for ensuring the simulation results of the suspension system and the overall vehicle performance.

[0003] However, if there is an error between the modeled leaf spring structure and the actual leaf spring structure during the modeling process, the whole vehicle model will also have a certain error, resulting in poor reliability of the relevant performance simulation analysis results. Consequently, the vehicle development project will be difficult to carry out due to data errors exceeding the threshold.

[0004] Therefore, it is essential to perform accurate modeling of the leaf springs to ensure the correctness of the suspension system and the vehicle model, guarantee the reliability of the performance simulation analysis results, and provide reliable guidance for engineering design. Summary of the Invention

[0005] Based on this, one objective of the present invention is to propose a leaf spring modeling method, system, computer, and readable storage medium to achieve accurate finite element modeling of leaf springs, improve the accuracy of suspension system simulation models, and finally provide a model basis for finite element simulation analysis of whole vehicles.

[0006] The leaf spring modeling method proposed in this embodiment of the invention includes the following steps:

[0007] Obtain the three-dimensional data of the leaf spring and the contact surface data between the individual leaf spring plates;

[0008] A finite element model of the leaf spring was established using hexahedral elements;

[0009] The leaf springs are connected in a unit-shared-node manner according to the bonding surface data;

[0010] Calculate the static stiffness value of the leaf spring and determine whether the leaf spring meets the preset conditions;

[0011] If so, the modeling is complete.

[0012] The leaf spring modeling method proposed in this invention involves meshing the leaf spring using hexahedral elements, connecting the leaf springs through shared nodes based on the contact surface information, and performing static stiffness analysis of the leaf spring with reference to the stiffness test boundary. The analyzed stiffness value matches the design stiffness value. Simultaneously, static stiffness testing is performed on the leaf spring, and the simulated and tested values ​​are compared. If the error is significant, the leaf spring data is adjusted, the leaf spring is remodeled, and static stiffness simulation analysis is performed again. This process is repeated until the error is minimized, ultimately completing the finite element modeling of the leaf spring. The beneficial effects are: by using the above method for static stiffness analysis and testing of suspension system leaf spring components, and employing a mesh-based finite element modeling approach for the leaf springs, the simulation results more closely resemble actual test conditions, resulting in more accurate simulated values ​​for the leaf spring's static stiffness.

[0013] In addition, the leaf spring modeling method provided by the present invention may also have the following additional technical features:

[0014] Furthermore, the step of calculating the static stiffness value of the leaf spring and determining whether the leaf spring meets the preset conditions specifically includes:

[0015] According to the preset test boundary, the static stiffness boundary conditions are defined for the finite element model of the leaf spring. The static stiffness boundary conditions include the degree of freedom constraint on the leaf spring's lug and the boundary value of applying a vertical load to the force point of the leaf spring.

[0016] The vertical deformation corresponding to the boundary value of the vertical load applied to the force point of the leaf spring is analyzed by simulation.

[0017] The simulation results of calculating and analyzing the static stiffness of the leaf spring based on the vertical deformation of the leaf spring and the boundary value of the applied vertical load are used.

[0018] The simulation results of the static stiffness value of the leaf spring are compared with the measured results of the static stiffness value of the leaf spring.

[0019] If the comparison error is within a preset range, then the static stiffness value of the leaf spring meets the preset condition.

[0020] Furthermore, the calculation formula for the simulation results of the static stiffness value of the leaf spring is as follows:

[0021]

[0022] Where ΔZ represents the vertical deformation, F represents the vertical load, and K represents the static stiffness.

[0023] Furthermore, the steps of obtaining the three-dimensional data of the leaf spring and the contact surface data between the individual leaf spring plates specifically include:

[0024] Obtain the digital model structure of each leaf spring in the leaf spring;

[0025] Assign material properties to each leaf spring;

[0026] Define the contact area between two adjacent leaf springs.

[0027] Furthermore, after determining that the leaf spring modeling is complete, the process also includes:

[0028] The completed finite element model of the leaf spring is then incorporated into the suspension system model;

[0029] Boundary conditions are defined for the suspension system model, and modal analysis is performed to calculate the simulated values ​​of the HOP / Tramp mode shapes and frequencies of the suspension system.

[0030] Compare the simulated and measured values ​​of HOP / Tramp mode shapes and frequencies to see if they are within the preset range;

[0031] If so, then it is determined that the leaf spring can be applied to the suspension system.

[0032] The present invention also proposes a leaf spring modeling system, the system comprising:

[0033] Data input module: used to acquire the three-dimensional data of the leaf spring and the contact surface data between the individual leaf spring plates;

[0034] Model building module: used to build the finite element model of the leaf spring using hexahedral elements;

[0035] Common node module: used to connect each leaf spring in a unit common node manner according to the bonding surface data;

[0036] Calculation and judgment module: used to calculate the static stiffness value of the leaf spring and determine whether the leaf spring meets the preset conditions;

[0037] End module: Used to complete the modeling when the leaf spring meets the preset conditions.

[0038] Furthermore, the system also includes:

[0039] Boundary condition setting module: used to define static stiffness boundary conditions for the finite element model of the leaf spring according to preset test boundaries, wherein the static stiffness boundary conditions include degree of freedom constraints on the leaf spring's lugs and boundary values ​​for applying vertical loads to the force points of the leaf spring.

[0040] Vertical deformation acquisition module: used to analyze the vertical deformation corresponding to the boundary value of the vertical load applied to the force point of the leaf spring through simulation.

[0041] Static stiffness calculation module: used to calculate and analyze the simulation results of the static stiffness value of the leaf spring based on the vertical deformation of the leaf spring and the boundary value of the applied vertical load;

[0042] Comparison module: used to compare the simulation result of the static stiffness value of the leaf spring with the measured result of the static stiffness value of the leaf spring; if the comparison error is within a preset range, the static stiffness value of the leaf spring meets the preset condition.

[0043] Furthermore, the data input module specifically includes:

[0044] Digital model loading unit: used to acquire the digital model structure of each leaf spring in the leaf spring;

[0045] Assignment unit: Used to assign material properties to each leaf spring;

[0046] Contact surface definition unit: used to define the contact area between two adjacent leaf springs.

[0047] Furthermore, embodiments of this application provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the leaf spring modeling method as described in the first aspect above.

[0048] Furthermore, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the leaf spring modeling method as described in the first aspect above.

[0049] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0050] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0051] Figure 1 This is a flowchart of the leaf spring modeling method proposed in Embodiment 1 of the present invention;

[0052] Figure 2 This is a flowchart of the leaf spring modeling method proposed in Embodiment 1 of the present invention, which calculates the static stiffness value of the leaf spring and determines whether the leaf spring meets the preset conditions;

[0053] Figure 3 This is a flowchart illustrating the process of obtaining three-dimensional data of a leaf spring and the contact surface data between the leaf spring plates in the leaf spring modeling method proposed in Embodiment 1 of the present invention.

[0054] Figure 4This is a flowchart illustrating the process of determining the completion of leaf spring modeling in Embodiment 1 of the present invention;

[0055] Figure 5 This is a schematic diagram of the leaf spring modeling system according to the second embodiment of the present invention. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0057] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0058] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0059] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0060] In current vehicle production processes, cargo systems typically utilize leaf spring suspension systems. Accurate modeling of leaf springs during the design and development process is crucial for ensuring accurate simulation results for both the suspension system and the overall vehicle performance.

[0061] However, if there is an error between the modeled leaf spring structure and the actual leaf spring structure during the modeling process, the whole vehicle model will also have a certain error, resulting in poor reliability of the relevant performance simulation analysis results. Consequently, the vehicle development project will be difficult to carry out due to data errors exceeding the threshold.

[0062] Therefore, it is essential to perform accurate modeling of leaf springs to ensure the correctness of the suspension system and vehicle model, guarantee the reliability of performance simulation analysis results, and provide reliable guidance for engineering design. To this end, this invention proposes a technical solution for leaf spring modeling to overcome the problems existing in the prior art.

[0063] Please see Figure 1 The first embodiment of the present invention provides a leaf spring modeling method, which includes the following steps:

[0064] Step S11: Obtain the three-dimensional data of the leaf spring and the contact surface data between each leaf spring leaf.

[0065] In this embodiment of the invention, the three-dimensional data of the leaf spring is CATIA data, which also includes the material type of the leaf spring, thus facilitating static stiffness simulation calculations based on the characteristics of the material. This is an example, not a limitation, of the use of CATIA data as the three-dimensional data of the leaf spring in this embodiment of the invention. Other formats of three-dimensional data can be used in other embodiments of the invention to achieve the same effect of facilitating static stiffness simulation calculations of the leaf spring. The invention does not impose specific limitations on this.

[0066] Step S12: Establish the finite element model of the leaf spring using hexahedral elements.

[0067] Step S13: Connect the leaf springs in a unit-shared-node manner according to the bonding surface data;

[0068] Understandably, the leaf spring model achieves the supporting and damping effect for the vehicle through the coordinated action of multiple stacked leaf springs. However, in actual working condition testing, the contact area between each leaf spring can interfere with the static stiffness value of the leaf spring. Based on the contact area between each leaf spring in the actual molded leaf spring, the leaf spring is divided into regions using hexahedral elements. The contact surfaces of each leaf spring are connected by sharing nodes, which makes the established finite element model of the leaf spring more similar to the characteristics of the actual leaf spring, and the final calculated static stiffness of the leaf spring is more accurate.

[0069] Step S14: Calculate the static stiffness value of the leaf spring and determine whether the leaf spring meets the preset conditions.

[0070] In this embodiment of the invention, the static stiffness value of the leaf spring is calculated using simulation software to obtain the simulated static stiffness value of the leaf spring. The obtained simulated static stiffness value is then compared with a preset value to determine whether the error between the two is within the preset range. The preset value is determined by the leaf spring stiffness test boundary.

[0071] Step S15: If yes, then the modeling is complete.

[0072] Understandably, when the simulated static stiffness value of the leaf spring has a large error compared to the preset value, it indicates that the current finite element model of the leaf spring has a large deviation and needs to be remodeled to reduce the error value. This process is repeated until the accurate modeling of the leaf spring finite element model is finally achieved.

[0073] In summary, the leaf spring modeling method provided by this invention, by using the above-mentioned method to perform static stiffness analysis and testing of the leaf spring components of the suspension system, and by using a mesh-based approach to perform finite element modeling of the leaf spring, makes the simulation effect more closely resemble the actual test conditions, thereby making the simulation value of the leaf spring static stiffness more accurate.

[0074] Please see Figure 2 The method for calculating the static stiffness value of a leaf spring and determining whether the leaf spring meets preset conditions in the leaf spring modeling method proposed in Embodiment 1 of the present invention includes the following steps:

[0075] Step S21: Define static stiffness boundary conditions for the finite element model of the leaf spring according to the preset test boundary.

[0076] The static stiffness boundary conditions include constraints on the degrees of freedom of the leaf spring's lugs and boundary values ​​for applying vertical loads to the spring's stress points. Specifically, the constraints on the degrees of freedom of the lugs refer to the positional limitation of the lugs, and the boundary value for the vertical load is the leaf spring's ultimate bearing capacity.

[0077] Step S22: Analyze the vertical deformation corresponding to the boundary value of the vertical load applied to the force point of the leaf spring through simulation.

[0078] After constraining the degrees of freedom of the leaf spring lug, the vertical deformation ΔZ of the leaf spring is obtained by applying a vertical load. It can be understood that the vertical deformation ΔZ is affected by the material properties, shape characteristics and applied vertical load of the leaf spring.

[0079] Step S23: Calculate and analyze the simulation results of the static stiffness value of the leaf spring based on the vertical deformation of the leaf spring and the boundary value of the applied vertical load.

[0080] In this embodiment of the invention, the vertical deformation of the leaf spring is linearly related to the vertical load, and the simulation value of the static stiffness of the leaf spring calculated by using both has high accuracy.

[0081] Step S24: Compare the simulation results of the static stiffness value of the leaf spring with the measured results of the static stiffness value of the leaf spring.

[0082] The measured static stiffness value of the leaf spring is the static stiffness value of the leaf spring under actual working conditions. The static stiffness value of the leaf spring under actual working conditions is also calculated by determining the value based on the applied vertical load and the perpendicular deformation of the leaf spring.

[0083] Step S25: If the comparison error is within the preset range, then the static stiffness value of the leaf spring meets the preset condition.

[0084] The static stiffness value of the leaf spring is simulated and determined using the above method. This ensures that the simulated static stiffness value of the leaf spring is relatively accurate, and it is compared with the static stiffness value of the leaf spring under actual working conditions to determine whether the current leaf spring data model is sufficiently close to the actual leaf spring.

[0085] Specifically, in this embodiment of the invention, the calculation formula for the simulation results of calculating and analyzing the static stiffness value of the leaf spring is as follows:

[0086]

[0087] Where ΔZ represents the vertical deformation, F represents the vertical load, and K represents the static stiffness.

[0088] In actual leaf spring stress conditions, the leaf springs are stacked on top of each other. If the relationship between their contact surfaces is not considered, the final calculated static stiffness simulation value will deviate significantly from the measured value under actual working conditions. Therefore, it is necessary to accurately simulate the contact condition of the leaf springs to improve the modeling accuracy of the leaf spring finite element model. Please refer to... Figure 3 In the leaf spring modeling method proposed in Embodiment 1 of the present invention, the specific steps for obtaining the three-dimensional data of the leaf spring and the contact surface data between the various leaf spring plates are as follows:

[0089] Step S31: Obtain the digital model structure of each leaf spring in the leaf spring.

[0090] Step S32: Assign material properties to each leaf spring.

[0091] It is understood that in the embodiments of the present invention, there are differences in the material properties between multiple leaf springs to achieve better support and shock absorption. Each leaf spring is assigned material properties according to the actual material properties of the leaf springs so that the three-dimensional data of the leaf springs are more consistent with the leaf springs under actual working conditions.

[0092] Step S33: Define the contact area between two adjacent leaf springs.

[0093] The contact area between two adjacent leaf springs is determined by the liquid coverage area of ​​the two adjacent leaf springs under boundary conditions, through the immersion of a small amount of liquid (e.g., water) in the actual leaf springs.

[0094] In summary, the above methods accurately determined the contact surface data of the leaf spring under boundary conditions, which improved the actual calculation results in the leaf spring modeling process and further enhanced the modeling accuracy of the leaf spring finite element model.

[0095] For further details, please refer to Figure 4 In Embodiment 1 of the present invention, after the step of determining that the leaf spring modeling is complete, the following steps are also included:

[0096] Step S41: Implant the completed finite element model of the leaf spring into the suspension system model.

[0097] Step S42: Define the boundary conditions for the suspension system model and perform modal analysis to calculate the simulated values ​​of the HOP / Tramp mode shapes and frequencies of the suspension system.

[0098] Step S43: Compare the simulated and measured values ​​of HOP / Tramp mode shape and frequency to see if they are within the preset range.

[0099] Step S44: If yes, then determine that the leaf spring can be applied to the suspension system.

[0100] Understandably, in this embodiment of the invention, the suspension system includes the aforementioned leaf spring structure. By embedding the finite element model of the leaf spring into the suspension system and performing modal analysis on the suspension system, the simulated values ​​of the HOP / Tramp mode shapes and frequencies of the suspension system are calculated to determine whether the entire suspension system is effectively modeled. Through the above technical solution, not only is the finite element modeling of the leaf spring completed, but it can also be used to further determine whether the leaf spring can be applied to the suspension system.

[0101] Please see Figure 5 The second embodiment of the present invention provides a leaf spring modeling system, specifically comprising:

[0102] Data input module 51: used to acquire the three-dimensional data of the leaf spring and the mating surface data between the individual leaf spring plates.

[0103] Model building module 52: Used to build a finite element model of a leaf spring using hexahedral elements.

[0104] Common node module 53: used to connect each leaf spring in a unit common node manner according to the bonding surface data.

[0105] Calculation and Judgment Module 54: Used to calculate the static stiffness value of the leaf spring and determine whether the leaf spring meets the preset conditions.

[0106] End module 55: This module is used to complete the modeling process when the leaf spring meets the preset conditions.

[0107] Furthermore, the system also includes:

[0108] Boundary condition setting module: used to define static stiffness boundary conditions for the finite element model of the leaf spring according to the preset test boundary. The static stiffness boundary conditions include degree of freedom constraints on the leaf spring's lugs and boundary values ​​for applying vertical loads to the force points of the leaf spring.

[0109] Vertical deformation acquisition module: used to analyze the vertical deformation corresponding to the boundary value of the vertical load applied to the force point of the leaf spring through simulation.

[0110] Static stiffness calculation module: This module is used to calculate and analyze the simulation results of the static stiffness value of the leaf spring based on the vertical deformation of the leaf spring and the boundary value of the applied vertical load.

[0111] Comparison module: Used to compare the simulation results of the static stiffness value of the leaf spring with the measured results of the static stiffness value of the leaf spring; if the comparison error is within the preset range, the static stiffness value of the leaf spring meets the preset conditions.

[0112] Furthermore, the data input module specifically includes:

[0113] Digital model loading unit: used to obtain the digital model structure of each leaf spring in the leaf spring.

[0114] Assignment unit: Used to assign material properties to each leaf spring.

[0115] Contact surface definition unit: used to define the contact area between two adjacent leaf springs.

[0116] The leaf spring modeling system provided by this invention, combined with the above-mentioned leaf spring modeling method, is used to perform static stiffness analysis and testing of the leaf spring components in the suspension system. The finite element modeling of the leaf spring using a mesh method makes the simulation effect more consistent with the actual test conditions, thereby making the simulation value of the leaf spring static stiffness more accurate.

[0117] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside in the same processor; or the above modules can be located in different processors in any combination.

[0118] In addition, combined Figure 1 The leaf spring modeling method described in this application can be implemented by a computer device. This computer device may include a processor and a memory storing computer program instructions.

[0119] Specifically, the processor may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0120] The memory may include a large-capacity storage device for data or instructions. For example, and not limitingly, the memory may include a hard disk drive (HDD), a floppy disk drive, a solid-state drive (SSD), flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include removable or non-removable (or fixed) media. Where appropriate, the memory may be internal or external to the data processing device. In a particular embodiment, the memory is non-volatile memory. In a particular embodiment, the memory includes read-only memory (ROM) and random access memory (RAM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable read-only ROM (PROM), an erasable programmable read-only ROM (EPROM), an electrically erasable programmable read-only ROM (EEPROM), an electrically alterable read-only ROM (EAROM), or flash memory, or a combination of two or more of these. Where appropriate, the RAM can be Static Random-Access Memory (SRAM) or Dynamic Random-Access Memory (DRAM). DRAM can be Fast Page Mode Dynamic Random-Access Memory (FPMDRAM), Extended Data Out Dynamic Random-Access Memory (EDODRAM), Synchronous Dynamic Random-Access Memory (SDRAM), etc.

[0121] Memory can be used to store or cache various data files that need to be processed and / or communicated, as well as possible computer program instructions executed by the processor.

[0122] The processor implements any of the leaf spring modeling methods described in the above embodiments by reading and executing computer program instructions stored in the memory.

[0123] Computer equipment may also include communication interfaces and buses. The processor, memory, and communication interface are connected via the bus to communicate with each other.

[0124] The communication interface is used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. The communication interface can also enable data communication with other components such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0125] A bus, including hardware, software, or both, couples components of a computer device together. Buses include, but are not limited to, at least one of the following: data bus, address bus, control bus, expansion bus, and local bus. For example, and not as a limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, a bus may include one or more buses. Although specific buses are described and illustrated in the embodiments of this application, this application considers any suitable bus or interconnection.

[0126] The computer device can execute the leaf spring modeling method in this application embodiment based on the acquired data information, thereby achieving the combination Figure 1 The described method for modeling leaf springs.

[0127] Furthermore, in conjunction with the leaf spring modeling methods in the above embodiments, this application embodiment can provide a computer-readable storage medium for implementation. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the leaf spring modeling methods in the above embodiments.

[0128] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for modeling leaf springs, characterized in that, The method includes the following steps: Obtain the three-dimensional data of the leaf spring and the contact surface data between the individual leaf spring plates; A finite element model of the leaf spring was established using hexahedral elements; The leaf springs are connected in a unit-shared-node manner according to the bonding surface data; Calculate the static stiffness value of the leaf spring and determine whether the leaf spring meets the preset conditions; If so, then the leaf spring modeling is complete; The steps of calculating the static stiffness value of the leaf spring and determining whether the leaf spring meets the preset conditions specifically include: According to the preset test boundary, the static stiffness boundary conditions are defined for the finite element model of the leaf spring. The static stiffness boundary conditions include the degree of freedom constraint on the leaf spring's lug and the boundary value of applying a vertical load to the force point of the leaf spring. The vertical deformation corresponding to the boundary value of the vertical load applied to the force point of the leaf spring is analyzed by simulation. The simulation results of calculating and analyzing the static stiffness of the leaf spring based on the vertical deformation of the leaf spring and the boundary value of the applied vertical load are used. The simulation results of the static stiffness value of the leaf spring are compared with the measured results of the static stiffness value of the leaf spring. If the comparison error is within a preset range, then the static stiffness value of the leaf spring meets the preset condition.

2. The leaf spring modeling method according to claim 1, characterized in that, The formula for calculating the static stiffness value of the leaf spring based on the simulation results is as follows: Where ΔZ represents the vertical deformation, F represents the vertical load, and K represents the static stiffness.

3. The leaf spring modeling method according to claim 1, characterized in that, The steps for obtaining the three-dimensional data of the leaf spring and the contact surface data between the individual leaf spring plates specifically include: Obtain the digital model structure of each leaf spring in the leaf spring; Assign material properties to each leaf spring; Define the contact area between two adjacent leaf springs.

4. The leaf spring modeling method according to claim 1, characterized in that, After determining that the leaf spring modeling is complete, the method further includes: The completed finite element model of the leaf spring is then incorporated into the suspension system model; Boundary conditions are defined for the suspension system model, and modal analysis is performed to calculate the simulated values ​​of the HOP / Tramp mode shapes and frequencies of the suspension system. Compare the simulated and measured values ​​of HOP / Tramp mode shapes and frequencies to see if they are within the preset range; If so, then it is determined that the leaf spring can be applied to the suspension system.

5. A leaf spring modeling system, characterized in that, The system includes: Data input module: used to acquire the three-dimensional data of the leaf spring and the contact surface data between the individual leaf spring plates; Model building module: used to build the finite element model of the leaf spring using hexahedral elements; Common node module: used to connect each leaf spring in a unit common node manner according to the bonding surface data; Calculation and judgment module: used to calculate the static stiffness value of the leaf spring and determine whether the leaf spring meets the preset conditions; End module: Used to complete modeling when the leaf spring meets preset conditions; The system also includes: Boundary condition setting module: used to define static stiffness boundary conditions for the finite element model of the leaf spring according to preset test boundaries, wherein the static stiffness boundary conditions include degree of freedom constraints on the leaf spring's lugs and boundary values ​​for applying vertical loads to the force points of the leaf spring. Vertical deformation acquisition module: used to analyze the vertical deformation corresponding to the boundary value of the vertical load applied to the force point of the leaf spring through simulation. Static stiffness calculation module: used to calculate and analyze the simulation results of the static stiffness value of the leaf spring based on the vertical deformation of the leaf spring and the boundary value of the applied vertical load; Comparison module: used to compare the simulation result of the static stiffness value of the leaf spring with the measured result of the static stiffness value of the leaf spring; if the comparison error is within a preset range, the static stiffness value of the leaf spring meets the preset condition.

6. The leaf spring modeling system according to claim 5, characterized in that, The data input module specifically includes: Digital model loading unit: used to acquire the digital model structure of each leaf spring in the leaf spring; Assignment unit: Used to assign material properties to each leaf spring; Contact surface definition unit: used to define the contact area between two adjacent leaf springs.

7. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the leaf spring modeling method as described in any one of claims 1 to 4.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the leaf spring modeling method as described in any one of claims 1 to 4.

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