Method, system, medium and equipment for obtaining simulation parameters of vehicle door sealing strip materials

Abstract

The present invention discloses a method, system, medium and equipment for obtaining simulation parameters of vehicle door sealing strip materials. The method includes the following steps: obtaining measured load and displacement curves of sealing strips in various regions of the vehicle door during compression tests of the sealing strips, and selecting the measured load and displacement curves of the sealing strips to be tested; performing simulation compression analysis on the simulation model and simulation working conditions of the sealing strips in the tested regions, and obtaining multiple groups of load and displacement simulation curves of the sealing strips to be tested; fitting the measured load and displacement curves of the sealing strips to be tested with the multiple groups of load and displacement simulation curves of the sealing strips to be tested, and obtaining target material parameters of the sealing strips; obtaining load and displacement simulation curves of the sealing strips in other regions of the vehicle door, and fitting the measured load and displacement curves of the sealing strips in other regions of the vehicle door with the load and displacement simulation curves of the sealing strips, and obtaining final material parameters of the sealing strips; the method can quickly and effectively obtain material parameters consistent with those of the actual vehicle sealing strips, and improve the simulation accuracy of the vehicle door opening and closing durability.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing strip simulation analysis, and in particular to a method, system, medium and equipment for obtaining simulation parameters of vehicle door sealing strip materials. Background Art

[0002] Car doors are frequently opened and closed during use. Their durability during the opening and closing process is an important indicator for evaluating car quality. The sealing strip is a key component of the door system and plays an important role in absorbing energy and buffering the door opening and closing process. The compression force of the sealing strip accounts for 35% to 50% of the door closing force. Therefore, the accuracy of the sealing strip material parameters will greatly affect the simulation accuracy of the door opening and closing durability.

[0003] Existing door opening and closing durability simulations often lack material parameters for sealing strips, often failing to account for them or using empirical parameters that don't match actual vehicle conditions. This results in poor simulation accuracy, hindering early durability design. Discovering problems during the trial production phase can be costly, both in terms of time and resources. Therefore, obtaining sealing strip material parameters consistent with actual vehicle conditions for early simulation is crucial for door design. Summary of the Invention

[0004] The present invention provides a method, system, medium and equipment for obtaining simulation parameters of vehicle door sealing strip materials, which can quickly and effectively obtain material parameters consistent with the actual vehicle sealing strip, improve the simulation accuracy of the vehicle door opening and closing durability, and provide effective guidance for the early design of the vehicle door.

[0005] In a first aspect, a method for obtaining simulation parameters of a vehicle door sealing strip material is provided, comprising the following steps:

[0006] Obtaining measured load and displacement curves of the sealing strips of each region of the vehicle door during compression tests of the sealing strips of each region, and selecting the measured load and displacement curve of the sealing strips of one region of the vehicle door as the measured load and displacement curve of the sealing strips of the region to be tested;

[0007] Based on the compression test conditions of the sealing strips in various areas of the door, simulation models and simulation conditions for each area of ​​the sealing strips are constructed. Simulation compression analysis of the sealing strip simulation models and simulation conditions in the test area is performed using Abaqus simulation software, obtaining multiple sets of load-displacement simulation curves for the tested sealing strips corresponding to multiple sets of different sealing strip material parameter values.

[0008] Call Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested and multiple sets of simulated load-displacement curves of the sealing strip to be tested to obtain the target material parameters of the sealing strip;

[0009] According to the target material parameters of the sealing strip, Abaqus simulation software is called to perform simulation compression analysis on the simulation model and simulation working conditions of the sealing strip in other areas of the vehicle door to obtain the load-displacement simulation curves of the sealing strip in other areas of the vehicle door. Hyperstudy optimization software is called to fit the measured load-displacement curves of the sealing strip in other areas of the vehicle door with the load-displacement simulation curves of the sealing strip to obtain the final material parameters of the sealing strip.

[0010] According to the first aspect, in a first possible implementation of the first aspect, the step of “obtaining measured load-displacement curves of the sealing strips in each region of the door during a compression test of the sealing strips in each region” specifically includes the following steps:

[0011] Obtain the measured load and displacement curves of the sealing strip in the hinge area of ​​the door frame strip, the measured load and displacement curves of the sealing strip in the door lock area of ​​the door frame strip, the measured load and displacement curves of the sealing strip in the hinge area of ​​the door strip, and the measured load and displacement curves of the sealing strip in the door lock area.

[0012] According to the first aspect, in a second possible implementation of the first aspect, the step of “calling Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of the test area, and obtaining multiple sets of load-displacement simulation curves of the tested sealing strip corresponding to multiple sets of different sealing strip material parameter values” specifically includes the following steps:

[0013] Performing a foaming simulation on a sealing strip simulation model of a test area based on a Hyperfoam hyperelastic constitutive model, and setting a preset variation range of sealing strip material parameters in the Hyperfoam hyperelastic constitutive model;

[0014] Multiple sets of different sealing strip material parameter values ​​are selected within the preset variation range, and Abaqus simulation software is called to perform simulation compression analysis on the Hyperfoam hyperelastic constitutive model and simulation conditions corresponding to the multiple sets of different sealing strip material parameter values, so as to obtain multiple sets of test sealing strip load-displacement simulation curves corresponding to the multiple sets of different sealing strip material parameter values.

[0015] According to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the Hyperfoam hyperelastic constitutive model is as follows:

[0016]

[0017] in,

[0018] Where W is strain energy; N is the order; μ i is the shear modulus material parameter; α i is the dimensionless undetermined coefficient material parameter; v iis the Poisson's ratio material parameter; Corresponding to α i The main elongation in three different main directions; J el is the elastic volume ratio; β i is the compressibility of the material.

[0019] According to the first aspect, in a fourth possible implementation of the first aspect, the step of “calling Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, and obtaining target material parameters of the sealing strip” specifically includes the following steps:

[0020] The AREA tool in the Hyperstudy optimization software is used to calculate the area enclosed by the measured load-displacement curves of the sealing strip to be tested and multiple sets of simulated load-displacement curves of the sealing strip to be tested;

[0021] The sealing strip material parameter value corresponding to the load-displacement simulation curve of the sealing strip to be tested with the smallest enclosed area is selected as the sealing strip target material parameter.

[0022] According to the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, the AREA tool calculation formula is as follows:

[0023]

[0024] Where a and b are the lower and upper limits of the horizontal coordinate of the curve, respectively; f(x) and g(x) are the simulated load-displacement curve and the measured load-displacement curve of the sealing strip to be tested, respectively.

[0025] According to the first aspect, in a sixth possible implementation of the first aspect, the step of “calling Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strips in other regions of the door with the simulated load-displacement curves of the sealing strips to obtain final material parameters of the sealing strips” specifically includes the following steps:

[0026] In other areas of the vehicle door, when it is detected that the fitting area values ​​of the sealing strip load-displacement simulation curve obtained according to the sealing strip target material parameters and the sealing strip load-displacement measured curve are both less than or equal to the preset area threshold, the sealing strip target material parameters are used as the final material parameters of the sealing strip.

[0027] In a second aspect, a system for acquiring simulation parameters of a vehicle door sealing strip material is provided, comprising the following steps:

[0028] A compression test module is used to obtain the measured load and displacement curves of the sealing strips in each area of ​​the door during the compression test of the sealing strips, and select the measured load and displacement curve of the sealing strips in one area of ​​the door as the measured load and displacement curve of the sealing strips in the area to be tested;

[0029] The simulation module is used to construct simulation models and operating conditions for the sealing strips in each area of ​​the vehicle door based on the compression test conditions of the sealing strips. The module also uses Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation models and operating conditions in the test area, obtaining multiple sets of load-displacement simulation curves for the tested sealing strips corresponding to multiple sets of different sealing strip material parameter values.

[0030] A fitting module, which is in communication with the compression test module and the simulation module, and is used to call Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, so as to obtain target material parameters of the sealing strip;

[0031] The final material parameter acquisition module is communicatively connected to the compression experiment module, the simulation module and the fitting module, and is used to call the Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of other areas of the vehicle door according to the target material parameters of the sealing strip, obtain the load-displacement simulation curves of the sealing strip in other areas of the vehicle door, call the Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strip in other areas of the vehicle door with the load-displacement simulation curves of the sealing strip, and obtain the final material parameters of the sealing strip.

[0032] In a third aspect, a storage medium is provided, on which a computer program is stored, characterized in that when the computer program is executed by a processor, the method for obtaining simulation parameters of the vehicle door sealing strip material as described above is implemented.

[0033] In a fourth aspect, an electronic device is provided, comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, wherein the processor implements the above-mentioned method for obtaining simulation parameters of vehicle door sealing strip materials when executing the computer program.

[0034] Compared with the existing technology, the advantages of the present invention are as follows: through sealing strip compression experiments and optimization simulation methods, combined with Abaqus and Hyperstudy simulation software, simulation modeling and nonlinear hyperelastic material parameter optimization are carried out for the compression experiments of the sealing strips in various directions, and the measured compression curve of the sealing strips is fitted according to the benchmark. The material parameters consistent with the actual vehicle sealing strip can be quickly and effectively obtained while considering the stiffness of the sealing strips in different directions and the entire nonlinear compression process, thereby improving the simulation accuracy of the door opening and closing durability and providing effective guidance for the early design of the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a flow chart of an embodiment of a method for obtaining simulation parameters of a vehicle door sealing strip material according to the present invention;

[0036] Figure 2 Schematic diagram of the simulation model of the sealing strips in various regions of the vehicle door according to the present invention;

[0037] Figure 3 This is a flow chart of another embodiment of a method for obtaining simulation parameters of a vehicle door sealing strip material according to the present invention;

[0038] Figure 4 It is a structural schematic diagram of a vehicle door sealing strip material simulation parameter acquisition system of the present invention. DETAILED DESCRIPTION

[0039] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that the present invention is not intended to be limited to those embodiments. On the contrary, it is intended to cover variations, modifications, and equivalents within the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0040] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Note: The following example is only a specific example and is not intended to limit the embodiments of the present invention to the following specific steps, values, conditions, data, sequence, etc. Those skilled in the art can apply the concepts of the present invention to construct more embodiments not described in this specification by reading this specification.

[0042] See also Figure 1 As shown, an embodiment of the present invention provides a method for obtaining simulation parameters of a vehicle door sealing strip material, which is characterized by comprising the following steps:

[0043] S100, obtaining a measured load-displacement curve of the sealing strip of each region of the vehicle door from a compression test of the sealing strip of each region, and selecting the measured load-displacement curve of the sealing strip of one region of the vehicle door as the measured load-displacement curve of the sealing strip of the region to be tested;

[0044] S200: Based on the compression test state of the sealing strips in various regions of the vehicle door, a simulation model and simulation working condition of the sealing strips in each region are constructed; Abaqus simulation software is used to perform simulation compression analysis on the sealing strip simulation model and simulation working condition of the tested region, and multiple sets of load-displacement simulation curves of the tested sealing strips corresponding to multiple sets of different sealing strip material parameter values ​​are obtained;

[0045] S300, calling Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, and obtaining target material parameters of the sealing strip;

[0046] S400: Based on the target material parameters of the sealing strip, call Abaqus simulation software to perform simulation compression analysis on the simulation models and simulation working conditions of the sealing strips in other areas of the vehicle door to obtain the load-displacement simulation curves of the sealing strips in other areas of the vehicle door. Call Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strips in other areas of the vehicle door with the load-displacement simulation curves of the sealing strips to obtain the final material parameters of the sealing strips.

[0047] Specifically, in this embodiment, due to the lack of sealing strip material parameters in the durability simulation of the vehicle door opening and closing, the sealing strip is often not considered or empirical parameters that do not match the actual vehicle state are used, resulting in poor simulation accuracy of the vehicle door opening and closing, which is not conducive to the durability performance design of the vehicle door in the early stage. If problems are discovered again in the trial production stage, the resulting time and resource costs are very high. Therefore, in response to the above problems, the present invention combines Abaqus and Hyperstudy simulation software to simulate modeling and optimize nonlinear hyperelastic material parameters for compression experiments in various directions of the sealing strip, and benchmarks the measured compression curve of the sealing strip. It can quickly and effectively obtain material parameters consistent with the actual vehicle sealing strip while considering the stiffness of the sealing strip in different directions and the entire nonlinear compression process, thereby improving the simulation accuracy of the vehicle door opening and closing durability and providing effective guidance for the early design of the vehicle door.

[0048] Preferably, in another embodiment of the present application, the step of "S100, obtaining measured load-displacement curves of the sealing strips in each region of the door in a compression test" specifically includes the following steps:

[0049] Obtain the measured load and displacement curves of the sealing strip in the hinge area of ​​the door frame strip, the measured load and displacement curves of the sealing strip in the door lock area of ​​the door frame strip, the measured load and displacement curves of the sealing strip in the hinge area of ​​the door strip, and the measured load and displacement curves of the sealing strip in the door lock area.

[0050] Specifically, in this embodiment, a microcomputer-controlled electronic universal testing machine is used, and a 100mm long sealing strip is taken. Considering that the door frame strip and the door strip have the same foam material but different stress states, and the stress states of the hinge area and the door lock area are different, compression tests are carried out on four cases respectively to obtain the measured load-displacement curves of the sealing strip in the hinge area of ​​the door frame strip, the measured load-displacement curves of the sealing strip in the door frame strip and door lock area, the measured load-displacement curves of the sealing strip in the hinge area of ​​the door strip, and the measured load-displacement curves of the sealing strip in the door strip and door lock area.

[0051] Considering the idle stroke of the movable tooling during the experiment, the compression curve is processed. The compression load and deformation displacement curve of the sealing strip are obtained by subtracting the idle stroke from the displacement of the horizontal axis. The horizontal axis displacement value and the vertical axis load value are processed into two columns of values ​​in XY format and saved as test.xy for subsequent simulation fitting.

[0052] Preferably, in another embodiment of the present application, the step of "S200, calling Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of the test area, and obtaining multiple sets of test sealing strip load-displacement simulation curves corresponding to multiple sets of different sealing strip material parameter values" specifically includes the following steps:

[0053] Performing a foaming simulation on a sealing strip simulation model of a test area based on a Hyperfoam hyperelastic constitutive model, and setting a preset variation range of sealing strip material parameters in the Hyperfoam hyperelastic constitutive model;

[0054] Multiple sets of different sealing strip material parameter values ​​are selected within the preset variation range, and Abaqus simulation software is called to perform simulation compression analysis on the Hyperfoam hyperelastic constitutive model and simulation conditions corresponding to the multiple sets of different sealing strip material parameter values, so as to obtain multiple sets of test sealing strip load-displacement simulation curves corresponding to the multiple sets of different sealing strip material parameter values.

[0055] Preferably, in another embodiment of the present application, the Hyperfoam hyperelastic constitutive model is as follows:

[0056]

[0057] in,

[0058] Where W is strain energy; N is the order. The higher the order and the more parameters, the more accurate the equation is in simulating the nonlinear mechanical behavior of the material. i is the shear modulus material parameter; α i is the dimensionless undetermined coefficient material parameter; v i is the Poisson's ratio material parameter; Corresponding to αi The main elongation in three different main directions; J el is the elastic volume ratio; β i is the compressibility of the material.

[0059] Specifically, in this embodiment, the constitutive equation can more accurately simulate the mechanical properties of compressible hyperelastic materials and can be applied to the simulation of sealing strip foam materials.

[0060] It should be noted that the material parameter corresponds to: μ i is the shear modulus material parameter; α i is the dimensionless undetermined coefficient material parameter; i is the Poisson's ratio material parameter, and multiple sets of different sealing strip material parameter values ​​can be selected within a preset range of variation.

[0061] Based on the compression test state of the sealing strips in each area of ​​the door, the specific steps for constructing the simulation model of the sealing strips in each area and the simulation working conditions are as follows: 1. Perform finite element modeling on the experimental fixture and sealing strips, and use 3D units for meshing. Figure 2 2. Constrain and load the simulation model according to the experimental conditions and establish contact. That is, the lower fixture is completely fixed and the upper fixture moves downward at a specified speed. To ensure computational efficiency, the upper fixture module should be in contact with the sealing strip in the initial state of the simulation.

[0062] Since the sealing strip material is the same in each state, the material parameters that meet the requirements of a single state must also meet the requirements of other states. Therefore, we select the hinge area of ​​the door frame strip, set N = 1, υ1 = 0.03, and set μ i and α i Defined as the independent variable, that is, the material parameter to be determined, a set of sealing strip material parameter values ​​are selected, such as: υ1 = 0.03, μ1 = 0.76, α1 = 10; the sealing strip compression process is simulated and calculated, and the compression force time history curve and the compression displacement time history curve of the sealing strip are obtained during the process, that is, multiple sets of sealing strip load-displacement simulation curves to be tested corresponding to multiple sets of different sealing strip material parameter values ​​are obtained, and then the sealing strip load-displacement simulation curves to be tested of the sealing strip compression simulation are obtained by processing, and the INP calculation file is saved for subsequent optimization calculations.

[0063] Preferably, in another embodiment of the present application, the step of "S300, calling Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, and obtaining target material parameters of the sealing strip" specifically includes the following steps:

[0064] The AREA tool in the Hyperstudy optimization software is used to calculate the area enclosed by the measured load-displacement curves of the sealing strip to be tested and multiple sets of simulated load-displacement curves of the sealing strip to be tested;

[0065] The sealing strip material parameter value corresponding to the load-displacement simulation curve of the sealing strip to be tested with the smallest enclosed area is selected as the sealing strip target material parameter.

[0066] Preferably, in another embodiment of the present application, the AREA tool calculation formula is as follows:

[0067]

[0068] Where a and b are the lower and upper limits of the horizontal coordinate of the curve, respectively; f(x) and g(x) are the simulated load-displacement curve and the measured load-displacement curve of the sealing strip to be tested, respectively.

[0069] Specifically, in this embodiment, the load-displacement simulation curve of the sealing strip to be tested is read. The specific operation is to read the result file, extract the displacement of the upper tooling as dependent variable 1, and extract the contact reaction force of the sealing strip as dependent variable 2.

[0070] Read the measured load-displacement curve of the sealing strip to be tested. The specific operation is to read the test.xy file, extract the displacement value in the first column as dependent variable 3, and extract the load value in the second column as dependent variable 4.

[0071] Select AREA, that is, the area between the two curves, as the optimization response. Define the horizontal coordinate of curve 1 as dependent variable 1 and the vertical coordinate as dependent variable 2; define the horizontal coordinate of curve 2 as dependent variable 3 and the vertical coordinate as dependent variable 4. Hyperstudy optimization software automatically calculates the area between curve 1 and curve 2 as the optimization response value. Select the sealing strip material parameter value corresponding to the load-displacement simulation curve of the sealing strip to be tested with the smallest enclosed area and the smallest optimization response value as the sealing strip target material parameter. At this time, the sealing strip target material parameter corresponds to μ i and α i .

[0072] Preferably, in another embodiment of the present application, the step of "S400, calling Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strips in other areas of the door with the simulated load-displacement curves of the sealing strips to obtain the final material parameters of the sealing strips" specifically includes the following steps:

[0073] In other areas of the vehicle door, when it is detected that the fitting area values ​​of the sealing strip load-displacement simulation curve obtained according to the sealing strip target material parameters and the sealing strip load-displacement measured curve are both less than or equal to the preset area threshold, the sealing strip target material parameters are used as the final material parameters of the sealing strip.

[0074] Specifically, in this embodiment, parameter fitting is performed only on the compression curve for a single state (e.g., the door frame strip hinge area). The resulting target material parameters for the sealing strip meet the compression performance requirements for that single state. Considering the different forces acting on the material parameters in different regions during the door closing process, the target material parameters for the sealing strip are substituted into the constitutive models for other states (e.g., the door frame strip door lock area, the door strip hinge area, and the door strip door lock area) to calculate and output simulated compression curves. These curves are then compared with the measured curves. If the two curves have a high degree of overlap (the fitted area between the measured sealing strip load-displacement curve and the simulated sealing strip load-displacement curve is less than or equal to a preset area threshold), the resulting material parameters meet the compression requirements for all directions and positions. If the constitutive model is appropriately selected, since the sealing strip material is the same in all states, the material parameters that meet the requirements for a single state will also necessarily meet the requirements for all other states. If the fitting effect is not satisfactory, consider replacing the material constitutive equation or increasing the order and material parameters in the constitutive equation. Repeat steps S200-S400 until material simulation parameters are obtained that ensure that the simulated compression curves for all positions and directions match the experimentally obtained curves.

[0075] See also Figure 3 As shown, an embodiment of the present invention provides a method for obtaining simulation parameters of a door sealing strip material, and the specific steps are as follows:

[0076] S100, obtaining a measured load-displacement curve of the sealing strip of each region of the vehicle door from a compression test of the sealing strip of each region, and selecting the measured load-displacement curve of the sealing strip of one region of the vehicle door as the measured load-displacement curve of the sealing strip of the region to be tested;

[0077] S200: Based on the compression test state of the sealing strips in various regions of the vehicle door, a simulation model and simulation working condition of the sealing strips in each region are constructed; Abaqus simulation software is used to perform simulation compression analysis on the sealing strip simulation model and simulation working condition of the tested region, and multiple sets of load-displacement simulation curves of the tested sealing strips corresponding to multiple sets of different sealing strip material parameter values ​​are obtained;

[0078] S300, calling Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, and obtaining target material parameters of the sealing strip;

[0079] S400: Based on the target material parameters of the sealing strip, call Abaqus simulation software to perform simulation compression analysis on the simulation models and simulation working conditions of the sealing strips in other areas of the vehicle door to obtain the load-displacement simulation curves of the sealing strips in other areas of the vehicle door. Call Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strips in other areas of the vehicle door with the load-displacement simulation curves of the sealing strips to obtain the final material parameters of the sealing strips.

[0080] Therefore, the present invention provides a method for obtaining simulation parameters of vehicle door sealing strip materials, which is applied to simulation analysis of vehicle door opening and closing durability and other fields closely related to sealing strips. The specific beneficial effects are as follows:

[0081] 1. It can fully consider the impact of the compression performance of the sealing strip on the simulation results, significantly improve the simulation accuracy, and provide effective guidance for the early design of the car door.

[0082] 2. Compression curve fitting is performed on the sealing strips in different stress states at various locations in the door. The obtained material parameters can fully consider the various stress forms of the sealing strips in various locations during the door opening and closing process, making the simulation of the stress state of the sealing strips in the door simulation more accurate.

[0083] 3. Benchmarking the entire compression process of the sealing strip, rather than just benchmarking the stiffness against a specific compression amount, allows the obtained material parameters to fully account for the nonlinearity of the sealing strip material and accurately simulate the entire compression and release process of the sealing strip during door opening and closing, making the simulation of the sealing strip's stress and deformation process in the door simulation more accurate.

[0084] 4. The obtained material parameters are the inherent properties of the material and will not change due to the sealing strip structure and door structure. They have a wide range of applications and strong versatility.

[0085] 5. The sealing strip compression test is a mandatory test for OTS approval of sealing strips, and the experimental data is easy to obtain; the simulation model only contains a 100mm long sealing strip and experimental fixtures, the model is small, and the calculation speed is fast.

[0086] See also Figure 4 As shown, an embodiment of the present invention further provides a system for obtaining simulation parameters of vehicle door sealing strip materials, which is characterized by comprising the following steps:

[0087] A compression test module is used to obtain the measured load and displacement curves of the sealing strips in each area of ​​the door during the compression test of the sealing strips, and select the measured load and displacement curve of the sealing strips in one area of ​​the door as the measured load and displacement curve of the sealing strips in the area to be tested;

[0088] The simulation module is used to construct simulation models and operating conditions for the sealing strips in each area of ​​the vehicle door based on the compression test conditions of the sealing strips. The module also uses Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation models and operating conditions in the test area, obtaining multiple sets of load-displacement simulation curves for the tested sealing strips corresponding to multiple sets of different sealing strip material parameter values.

[0089] A fitting module, which is in communication with the compression test module and the simulation module, and is used to call Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, so as to obtain target material parameters of the sealing strip;

[0090] The final material parameter acquisition module is communicatively connected to the compression experiment module, the simulation module and the fitting module, and is used to call the Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of other areas of the vehicle door according to the target material parameters of the sealing strip, obtain the load-displacement simulation curves of the sealing strip in other areas of the vehicle door, call the Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strip in other areas of the vehicle door with the load-displacement simulation curves of the sealing strip, and obtain the final material parameters of the sealing strip.

[0091] Therefore, the present invention uses sealing strip compression experiments and optimization simulation methods, combined with Abaqus and Hyperstudy simulation software, to simulate modeling and optimize nonlinear hyperelastic material parameters for compression experiments in various directions of the sealing strip, and benchmarks the measured compression curve of the sealing strip. It can quickly and effectively obtain material parameters consistent with the actual vehicle sealing strip while considering the stiffness of the sealing strip in different directions and the entire nonlinear compression process, thereby improving the simulation accuracy of the door opening and closing durability and providing effective guidance for the early design of the door.

[0092] Specifically, this embodiment corresponds one-to-one to the above method embodiment, and the functions of each module have been described in detail in the corresponding method embodiment, so they will not be repeated here.

[0093] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0094] The present invention implements all or part of the process in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of each of the above method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0095] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0096] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor. The processor is the control center of a computer device, connecting all parts of the entire computer device using various interfaces and lines.

[0097] The memory can be used to store computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created based on the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0098] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, servers, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage) containing computer-usable program code.

[0099] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0100] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0101] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0102] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for obtaining simulation parameters of door sealing strip materials, characterized in that: The following steps are involved: Obtaining measured load and displacement curves of the sealing strips of each region of the vehicle door during compression tests of the sealing strips of each region, and selecting the measured load and displacement curve of the sealing strips of one region of the vehicle door as the measured load and displacement curve of the sealing strips of the region to be tested; Based on the compression test state of the sealing strips in each area of ​​the door, the simulation model and simulation working conditions of the sealing strips in each area are constructed; Call Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of the test area, and obtain multiple sets of test sealing strip load-displacement simulation curves corresponding to multiple sets of different sealing strip material parameter values; Call Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested and multiple sets of simulated load-displacement curves of the sealing strip to be tested to obtain the target material parameters of the sealing strip; According to the target material parameters of the sealing strip, Abaqus simulation software is called to perform simulation compression analysis on the simulation model and simulation working conditions of the sealing strip in other areas of the vehicle door to obtain the load-displacement simulation curves of the sealing strip in other areas of the vehicle door. Hyperstudy optimization software is called to fit the measured load-displacement curves of the sealing strip in other areas of the vehicle door with the load-displacement simulation curves of the sealing strip to obtain the final material parameters of the sealing strip.

2. The method for obtaining simulation parameters of a vehicle door sealing strip material according to claim 1, wherein: The step of "obtaining measured load-displacement curves of the sealing strips in each area of ​​the door during the compression test of the sealing strips in each area" specifically includes the following steps: Obtain the measured load and displacement curves of the sealing strip in the hinge area of ​​the door frame strip, the measured load and displacement curves of the sealing strip in the door lock area of ​​the door frame strip, the measured load and displacement curves of the sealing strip in the hinge area of ​​the door strip, and the measured load and displacement curves of the sealing strip in the door lock area.

3. The method for obtaining simulation parameters of a vehicle door sealing strip material according to claim 1, wherein: The step of "calling Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of the test area, and obtaining multiple sets of test sealing strip load-displacement simulation curves corresponding to multiple sets of different sealing strip material parameter values" specifically includes the following steps: Performing a foaming simulation on a sealing strip simulation model of a test area based on a Hyperfoam hyperelastic constitutive model, and setting a preset variation range of sealing strip material parameters in the Hyperfoam hyperelastic constitutive model; Multiple sets of different sealing strip material parameter values ​​are selected within the preset variation range, and Abaqus simulation software is called to perform simulation compression analysis on the Hyperfoam hyperelastic constitutive model and simulation conditions corresponding to the multiple sets of different sealing strip material parameter values, so as to obtain multiple sets of test sealing strip load-displacement simulation curves corresponding to the multiple sets of different sealing strip material parameter values.

4. The method for obtaining simulation parameters of a vehicle door sealing strip material according to claim 3, wherein: The Hyperfoam hyperelastic constitutive model is as follows: in, Where W is strain energy; N is the order; μ i is the shear modulus material parameter; α i is the dimensionless undetermined coefficient material parameter; i is the Poisson's ratio material parameter; Corresponding to α i The main elongation in three different main directions; J el is the elastic volume ratio; β i is the compressibility of the material.

5. The method for obtaining simulation parameters of a vehicle door sealing strip material according to claim 1, wherein: The step of "calling Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, and obtaining target material parameters of the sealing strip" specifically includes the following steps: The AREA tool in the Hyperstudy optimization software is used to calculate the area enclosed by the measured load-displacement curves of the sealing strip to be tested and multiple sets of simulated load-displacement curves of the sealing strip to be tested; The sealing strip material parameter value corresponding to the load-displacement simulation curve of the sealing strip to be tested with the smallest enclosed area is selected as the sealing strip target material parameter.

6. The method for obtaining simulation parameters of a vehicle door sealing strip material according to claim 5, wherein: The AREA tool calculation formula is as follows: Where a and b are the lower and upper limits of the horizontal coordinate of the curve, respectively; f(x) and g(x) are the simulated load-displacement curve and the measured load-displacement curve of the sealing strip to be tested, respectively.

7. The method for obtaining simulation parameters of a vehicle door sealing strip material according to claim 1, wherein: The step of "calling Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strips in other areas of the door with the simulated load-displacement curves of the sealing strips to obtain the final material parameters of the sealing strips" specifically includes the following steps: In other areas of the vehicle door, when it is detected that the fitting area values ​​of the sealing strip load-displacement simulation curve obtained according to the sealing strip target material parameters and the sealing strip load-displacement measured curve are both less than or equal to the preset area threshold, the sealing strip target material parameters are used as the final material parameters of the sealing strip.

8. A system for acquiring simulation parameters of door sealing strip materials, characterized in that: The following steps are involved: A compression test module is used to obtain the measured load and displacement curves of the sealing strips in each area of ​​the door during the compression test of the sealing strips, and select the measured load and displacement curve of the sealing strips in one area of ​​the door as the measured load and displacement curve of the sealing strips in the area to be tested; The simulation module is used to build simulation models and simulation working conditions of the sealing strips in each area of ​​the door based on the compression test state of the sealing strips in each area of ​​the door; Call Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of the test area, and obtain multiple sets of test sealing strip load-displacement simulation curves corresponding to multiple sets of different sealing strip material parameter values; A fitting module, which is in communication with the compression test module and the simulation module, and is used to call Hyperstudy optimization software to fit the measured load-displacement curve of the sealing strip to be tested with multiple sets of simulated load-displacement curves of the sealing strip to be tested, so as to obtain target material parameters of the sealing strip; The final material parameter acquisition module is communicatively connected to the compression experiment module, the simulation module and the fitting module, and is used to call the Abaqus simulation software to perform simulation compression analysis on the sealing strip simulation model and simulation working conditions of other areas of the vehicle door according to the target material parameters of the sealing strip, obtain the load-displacement simulation curves of the sealing strip in other areas of the vehicle door, call the Hyperstudy optimization software to fit the measured load-displacement curves of the sealing strip in other areas of the vehicle door with the load-displacement simulation curves of the sealing strip, and obtain the final material parameters of the sealing strip.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for obtaining simulation parameters of a vehicle door sealing strip material according to any one of claims 1 to 7 is implemented.

10. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, wherein: When the processor runs the computer program, the method for obtaining simulation parameters of a vehicle door sealing strip material according to any one of claims 1 to 7 is implemented.

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