Vehicle door over-opening simulation analysis method, device and equipment and readable storage medium

Abstract

The invention discloses a vehicle door over-opening simulation analysis method, device and equipment and a readable storage medium, and the vehicle door over-opening simulation analysis method comprises the steps: building a finite element simulation model based on a to-be-analyzed vehicle door and hinge geometric model; acquiring stretching, compression and shearing characteristic data of the rubber cushion; loading the stretching, compression and shear characteristic data of the rubber cushion into the finite element simulation model, loading a force with a preset magnitude for the vehicle door in the finite element simulation model, and calculating the displacement of the vehicle door through the finite element simulation model; the over-opening angle of the vehicle door is calculated according to the displacement of the vehicle door, and if the over-opening angle of the vehicle door is larger than a preset angle, it is judged that the detection result of the hinge and the limiting mechanism is not passed. According to the vehicle door over-opening simulation analysis method and the vehicle door over-opening simulation analysis device, when the vehicle door is over-opened, the rubber cushion is subjected to the effects of stretching, compression and shear dislocation while being subjected to non-uniform extrusion, the stretching, compression and shear characteristic data of the rubber cushion are loaded into the finite element simulation model, and the accuracy of vehicle door over-opening simulation analysis can be improved.

Description

Technical Field

[0001] The present application relates to the field of simulation technology, and in particular to a vehicle door over-opening simulation analysis method, device, equipment and readable storage medium. Background Art

[0002] The door is one of the outer covering parts of the car body. It is connected to the car body through hinges and limit mechanisms to achieve the function of opening and closing. When the door is opened to the full opening angle, the limit mechanism starts to work to limit the opening angle of the door. Door over-opening refers to the excessive opening of the door after the door is opened to the designed standard full opening angle due to the force it is subjected to. Door over-opening can easily cause fatigue damage to the door and hinges and other components. Therefore, it is very necessary to conduct door over-opening analysis.

[0003] However, the current door over-opening analysis has the problem of low accuracy. Summary of the invention

[0004] The present application provides a vehicle door over-opening simulation analysis method, device, equipment and readable storage medium, aiming to solve the technical problem that the current vehicle door over-opening analysis has low accuracy.

[0005] In a first aspect, an embodiment of the present application provides a door over-opening simulation analysis method, the door over-opening simulation analysis method comprising:

[0006] A finite element simulation model is established based on the geometric model of the door and hinge to be analyzed, wherein the hinge includes a limiting mechanism, and the limiting mechanism includes a rubber cushion;

[0007] Obtain the tensile, compressive and shear property data of the rubber pad;

[0008] The tensile, compressive and shear characteristic data of the rubber cushion are loaded into the finite element simulation model, a preset force is loaded on the door in the finite element simulation model, and the displacement of the door is calculated by the finite element simulation model, wherein the preset force is loaded on the door to cause the door to over-open;

[0009] The over-opening angle of the door is calculated based on the displacement of the door. If the over-opening angle of the door is greater than a preset angle, the inspection result of the hinge and the limit mechanism is determined to be failed.

[0010] Optionally, the establishing of a finite element simulation model based on the geometric model of the door and hinge to be analyzed includes:

[0011] Use finite element simulation model software to mesh the geometric model of the door and hinge to be analyzed;

[0012] In the finite element simulation model software, a connection relationship and a kinematic pair are established for the door and the hinge, a contact pair is established for the door and the hinge, material properties are set for the door and the hinge, boundary conditions are set for the door and the hinge, and a finite element simulation model of the door and the hinge is obtained.

[0013] Optionally, the step of obtaining the tensile, compressive and shear characteristic data of the rubber pad includes:

[0014] By carrying out uniaxial tensile test, equibiaxial extension test and plane tensile test on the rubber cushion respectively, the tensile, compression and shear characteristic data of the corresponding rubber cushion are obtained.

[0015] Optionally, before the vehicle door is loaded with a preset force in the finite element simulation model and the displacement of the vehicle door is calculated by the finite element simulation model, the method further includes:

[0016] The Poisson's ratio, density and thermal expansion coefficient of the rubber cushion are loaded into the finite element simulation model;

[0017] The rubber pad is set to large deformation in the finite element simulation model.

[0018] Optionally, before the force of a preset magnitude is applied to the vehicle door in the finite element simulation model and the displacement of the vehicle door is calculated by the finite element simulation model, the method further includes:

[0019] The CNTSTB card is used to apply damping springs of preset sizes in the contact tangential and normal directions to improve the convergence of the contact.

[0020] Optionally, the hinge also includes a door-end hinge seat, a vehicle body-end hinge seat, a hinge arm and a rotating support rod, and the limiting mechanism also includes a hinge body limiting mechanism. The hinge body limiting mechanism and the rubber pad together limit the excessive opening of the door.

[0021] In a second aspect, an embodiment of the present application provides a door over-opening simulation analysis device, the door over-opening simulation analysis device comprising:

[0022] An establishment module is used to establish a finite element simulation model based on a geometric model of a door and a hinge to be analyzed, wherein the hinge includes a limiting mechanism, and the limiting mechanism includes a rubber cushion;

[0023] An acquisition module is used to acquire the tensile, compressive and shear characteristic data of the rubber pad;

[0024] A simulation module, used for loading the tensile, compressive and shear characteristic data of the rubber cushion into a finite element simulation model, loading a preset force on the door in the finite element simulation model, and calculating the displacement of the door through the finite element simulation model, wherein the preset force loaded on the door is used to cause the door to over-open;

[0025] The determination module is used to calculate the over-opening angle of the door according to the displacement of the door. If the over-opening angle of the door is greater than a preset angle, the detection result of the hinge and the limit mechanism is determined to be failed.

[0026] Optionally, the establishing module is used to:

[0027] Use finite element simulation model software to mesh the geometric model of the door and hinge to be analyzed;

[0028] In the finite element simulation model software, a connection relationship and a kinematic pair are established for the door and the hinge, a contact pair is established for the door and the hinge, material properties are set for the door and the hinge, boundary conditions are set for the door and the hinge, and a finite element simulation model of the door and the hinge is obtained.

[0029] In the third aspect, an embodiment of the present application provides a vehicle door over-opening simulation analysis device, which includes a processor, a memory, and a vehicle door over-opening simulation analysis program stored in the memory and executable by the processor, wherein when the vehicle door over-opening simulation analysis program is executed by the processor, the steps of the vehicle door over-opening simulation analysis method as described above are implemented.

[0030] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a vehicle door over-opening simulation analysis program is stored. When the vehicle door over-opening simulation analysis program is executed by a processor, the steps of the vehicle door over-opening simulation analysis method as described above are implemented.

[0031] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0032] In an embodiment of the present application, a finite element simulation model is established based on a geometric model of a vehicle door and a hinge to be analyzed, wherein the hinge includes a limiting mechanism, and the limiting mechanism includes a rubber pad; tensile, compressive and shear characteristic data of the rubber pad are obtained; the tensile, compressive and shear characteristic data of the rubber pad are loaded into the finite element simulation model, a preset force is loaded on the vehicle door in the finite element simulation model, and the displacement of the vehicle door is calculated by the finite element simulation model, wherein the preset force is loaded on the vehicle door to cause the vehicle door to over-open; the over-opening angle of the vehicle door is calculated based on the displacement of the vehicle door, and if the over-opening angle of the vehicle door is greater than the preset angle, the inspection result of the hinge and the limiting mechanism is determined to be failed. In the embodiment of the present application, for a door hinge with a rubber pad as a limiting mechanism, the rubber pad is subjected to uneven squeezing and tension, compression and shear displacement when the door is over-opened. Therefore, the tension, compression and shear characteristic data of the rubber pad are correspondingly loaded into the finite element simulation model, so as to more accurately simulate the limiting role of the rubber pad in the process of over-opening of the door, thereby improving the accuracy of the simulation analysis of the over-opening of the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of an embodiment of a door over-opening simulation analysis method of the present application;

[0034] Figure 2 A schematic diagram of a door hinge structure of an embodiment of a door over-opening simulation analysis method of the present application;

[0035] Figure 3 For this application Figure 1 A detailed flow chart of step S10;

[0036] Figure 4 A schematic diagram of a kinematic pair of an embodiment of a door over-opening simulation analysis method of the present application;

[0037] Figure 5 A schematic diagram of the stress-strain curve of an elastic-plastic material in an embodiment of a simulation analysis method for vehicle door over-opening of the present application;

[0038] Figure 6 A schematic diagram of a stress-strain curve of a rubber cushion according to an embodiment of a door over-opening simulation analysis method of the present application;

[0039] Figure 7 This is a schematic diagram of the functional modules of an embodiment of a door over-opening simulation analysis device of the present application;

[0040] Figure 8 This is a schematic diagram of the hardware structure of the vehicle door over-opening simulation analysis device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0043] In a first aspect, an embodiment of the present application provides a door over-opening simulation analysis method.

[0044] In one embodiment, referring to Figure 1 , Figure 1 FIG. 1 is a flow chart of an embodiment of a door over-opening simulation analysis method of the present application. Figure 1As shown in the figure, the door over-opening simulation analysis method includes:

[0045] Step S10, establishing a finite element simulation model based on the geometric model of the door and hinge to be analyzed, wherein the hinge includes a limiting mechanism, and the limiting mechanism includes a rubber cushion.

[0046] In this embodiment, the geometric model data file of the door and hinge to be analyzed can be imported into the finite element simulation model software, such as Hypermesh, and then the door and hinge are meshed in the Hypermesh software, and connection relationships and kinematic pairs are established, so as to establish a finite element simulation model of the door and hinge to be analyzed. Hypermesh is a powerful CAE (Computer Aided Engineering) application software package developed by Altair Corporation of the United States, which is mainly used for pre-processing and post-processing of finite element analysis. When establishing the finite element simulation model, the body in white can also be included. Figure 2 , Figure 2 Schematic diagram of the door hinge structure of an embodiment of the door over-opening simulation analysis method of the present application, as shown in FIG. Figure 2 As shown, the hinge may include a door end hinge seat 1, a vehicle body end hinge seat 2, a hinge arm 3 and a rotating support rod 4 in addition to the limiting mechanism. The limiting mechanism may include other limiting mechanisms in addition to the rubber pad 6, such as a hinge body limiting mechanism 5. The hinge body limiting mechanism 5 and the rubber pad 6 together limit the excessive opening of the door. The number of limiting mechanisms is not limited herein, that is, the present application can be applied to doors and hinges with multiple limiting mechanisms.

[0047] Step S20, obtaining the tensile, compressive and shear characteristic data of the rubber pad.

[0048] In the present embodiment, it should be noted that the present application is mainly aimed at the simulation analysis of vehicle door over-opening including a rubber pad as a limiting mechanism. When the vehicle door is over-opened, the rubber pad is subjected to uneven squeezing and is simultaneously subjected to stretching, compression and shear displacement. Therefore, when performing the simulation analysis of the vehicle door over-opening, the stretching, compression and shear characteristic data of the rubber pad are obtained and added to the simulation analysis process to improve the accuracy of the simulation analysis of the vehicle door over-opening.

[0049] Step S30, loading the tensile, compressive and shear characteristic data of the rubber pad into the finite element simulation model, loading a preset force on the vehicle door in the finite element simulation model, and calculating the displacement of the vehicle door through the finite element simulation model, wherein the preset force loaded on the vehicle door is used to cause the vehicle door to over-open.

[0050] In this embodiment, the tensile, compressive and shear characteristic data of the rubber cushion correspond to three sets of stress-strain curves respectively. In the finite element simulation model software, the Arruda-Boyce model can be selected to load the three sets of stress-strain curves corresponding to the tensile, compressive and shear characteristic data of the rubber cushion into the Arruda-Boyce model. The Arruda-Boyce model is used to simulate the deformation of the rubber cushion, a hyperelastic material, during the over-opening process of the door. The Arruda-Boyce model is a material model based on energy potential function, which takes into account the nonlinear behavior of the rubber material under large deformation. In the finite element simulation model, a preset force is loaded on the door to cause the door to over-open, simulating the situation where the door over-opens during actual use. The finite element simulation model can use nonlinear calculation, and the load increment step is set to 0.2, for example. Geometric nonlinearity is turned on at the same time during calculation. After setting the relevant calculation conditions, the finite element simulation model software is used to perform calculations and solve to obtain the displacement of the door.

[0051] Step S40, calculating the over-opening angle of the door according to the displacement of the door, if the over-opening angle of the door is greater than a preset angle, the detection result of the hinge and the limit mechanism is determined to be failed.

[0052] In this embodiment, according to the displacement of the door, combined with the measurement position of the displacement of the door and the position around which the door rotates, the displacement of the door is converted and calculated to obtain the over-opening angle of the door. The preset angle refers to the maximum value of the over-opening angle of the door set during the design and development of the door and hinge. If the over-opening angle obtained by the over-opening simulation analysis of the door is greater than the preset angle, it means that the position and structure of the door and hinge (including the rubber cushion) are not reasonably designed, and design optimization and improvement are required, such as improving the structure of the hinge and thickening the rubber cushion. Among them, the over-opening angle can be determined according to the preset force loaded on the door in the finite element simulation model, that is, the greater the preset force loaded on the door in the finite element simulation model, the larger the over-opening angle can be set when the simulation result is determined.

[0053] In this embodiment, the geometric model data file of the door and hinge to be analyzed can be imported into the finite element simulation model software to establish a finite element simulation model of the door and hinge to be analyzed. When performing the door over-opening simulation analysis, the tensile, compression and shear characteristic data of the rubber pad are obtained and added to the simulation analysis process to improve the accuracy of the door over-opening simulation analysis. The tensile, compression and shear characteristic data of the rubber pad correspond to three groups of stress-strain curves respectively. In the finite element simulation model software, the Arruda-Boyce model can be selected to load the three groups of stress-strain curves corresponding to the tensile, compression and shear characteristic data of the rubber pad into the Arruda-Boyce model. The Arruda-Boyce model is used to simulate the deformation of a hyperelastic material such as a rubber pad during the over-opening of a door. If the over-opening angle obtained through the simulation analysis of the over-opening of the door is greater than the preset angle, it means that the design of the position and structure of the door and hinge (including the rubber pad) is not reasonable and needs to be optimized and improved. For the door hinge with a rubber pad as the limiting mechanism, the rubber pad is subjected to uneven extrusion and tension, compression and shear displacement when the door is over-opened. By loading the tensile, compression and shear characteristic data of the rubber pad into the finite element simulation model, the limiting role of the rubber pad in the process of over-opening of the door can be more accurately simulated, which can improve the accuracy of the simulation analysis of the over-opening of the door.

[0054] Further, in one embodiment, referring to Figure 2 , Figure 2 For this application Figure 1 The detailed flow chart of step S10 is as follows: Figure 2 As shown, step S10 includes:

[0055] Step S101, using finite element simulation model software to mesh the geometric model of the door and hinge to be analyzed;

[0056] Step S102, in the finite element simulation model software, establish a connection relationship and a kinematic pair for the door and the hinge, establish a contact pair for the door and the hinge, set material properties for the door and the hinge, set boundary conditions for the door and the hinge, and obtain a finite element simulation model of the door and the hinge.

[0057] In this embodiment, the geometric model data files of the door and hinge to be analyzed can be imported into the finite element simulation model software, such as Hypermesh, and then the door and hinge can be meshed in the Hypermesh software. When establishing the finite element simulation model, the body in white can also be included. Figure 2In addition to the limiting mechanism, the hinge may also include a door end hinge seat 1, a vehicle body end hinge seat 2, a hinge arm 3 and a rotating support rod 4. In addition to the rubber pad 6, the limiting mechanism may also include other limiting mechanisms, such as a hinge body limiting mechanism 5. The hinge body limiting mechanism 5 and the rubber pad 6 jointly limit the over-opening of the door. Specifically, establish a connection relationship and a kinematic pair: When performing simulation analysis, a kinematic pair is used to simulate the relative movement between hinge mechanisms. The kinematic pair is achieved by creating a rigid unit and releasing the corresponding degrees of freedom. Refer to Figure 4 , Figure 4 This is a schematic diagram of a kinematic pair of an embodiment of a door over-opening simulation analysis method of the present application, as shown in FIG. Figure 4 As shown, the kinematic pair 11 can realize the relative rotation between the door end hinge seat 1 and the hinge arm 3, the kinematic pair 12 can realize the relative rotation between the hinge arm 3 and the rotating support rod 4, the kinematic pair 13 can realize the relative rotation between the body end hinge seat 2 and the rotating support rod 4, and the kinematic pair 14 can realize the relative rotation between the body end hinge seat 2 and the hinge arm 3; establish a contact pair: the hinge body limiting mechanism 5 achieves the effect of mutual limiting through the mutual contact of the door end hinge seat 1 and a part of the structure of the hinge arm 3. The hinge body limiting mechanism 5 is simulated by the contact pair. The contact pair requires that the two contacting surfaces do not penetrate and the normals are opposite to each other. Specifically, PCON The T card sets the contact state, considering the contact friction coefficient of the limit mechanism. The friction coefficient is determined according to the test of the corresponding material. The rubber pad 6 plays a role in limit enhancement. During the opening process of the door hinge, the rubber pad 6 is squeezed by the hinge seat 2 and the hinge arm 3 at the vehicle body end. The contact surfaces of the rubber pad 6 and the hinge seat 2 and the hinge arm 3 at the vehicle body end need to establish contact pairs respectively. In addition, the rubber pad 6 is assembled on the hinge seat 2 at the vehicle body end through interference fit, and a contact pair also needs to be established at the assembly point; establish elastic-plastic materials: the door end hinge seat 1, the vehicle body end hinge seat 2, the hinge arm 3, and the rotating support rod 4 are simulated and analyzed using elastic-plastic materials in nonlinear materials, referring to Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the stress-strain curve of the elastic-plastic material of an embodiment of the door over-opening simulation analysis method of the present application. Figure 5 As shown, a stress-strain curve of the material is established for each component. The curve is obtained from the corresponding tensile test of the material, and the material is set as an elastic-plastic material that can change with temperature and stress; create boundary conditions: In finite element analysis, boundary conditions refer to constraints imposed on the boundaries or contact surfaces of the model to limit the degrees of freedom of the structure. Boundary conditions may include fixed supports, imposed displacements, imposed loads, etc. By applying appropriate boundary conditions, the actual working state of a real engineering structure can be simulated, thereby accurately evaluating the response and performance of the structure.

[0058] Furthermore, in one embodiment, step S20 includes:

[0059] By carrying out uniaxial tensile test, equibiaxial extension test and plane tensile test on the rubber cushion respectively, the tensile, compression and shear characteristic data of the corresponding rubber cushion are obtained.

[0060] In this embodiment, refer to Figure 6 , Figure 6 FIG. 1 is a schematic diagram of a stress-strain curve of a rubber cushion in accordance with an embodiment of a door over-opening simulation analysis method of the present invention. Figure 6 As shown in the figure, three sets of stress-strain curves are obtained for the rubber pad through uniaxial tensile test, equibiaxial extension test and plane tensile test, which correspond to the tensile, compressive and shear properties of the material respectively. The three sets of stress-strain curves are loaded into the Arruda-Boyce model respectively to better simulate the deformation of the rubber pad, a hyperelastic material, during the door over-opening process, so as to improve the accuracy of the door over-opening simulation analysis.

[0061] Furthermore, in one embodiment, before the vehicle door is loaded with a preset force in the finite element simulation model and the displacement of the vehicle door is calculated by the finite element simulation model, the method includes:

[0062] The Poisson's ratio, density and thermal expansion coefficient of the rubber cushion are loaded into the finite element simulation model;

[0063] The rubber pad is set to large deformation in the finite element simulation model.

[0064] In this embodiment, the Poisson's ratio, density and thermal expansion coefficient of the rubber pad are loaded into the Arruda-Boyce model together with the three sets of stress-strain curves of the rubber pad, wherein the geometric structure undergoes a large deformation, resulting in the stiffness no longer conforming to a linear relationship. This situation belongs to geometric nonlinearity. When simulating a hyperelastic material such as a rubber pad, it is necessary to consider both nonlinear behavior and large reversible deformation. When the rubber pad material is subjected to large strains, the response still needs to remain elastic. Therefore, it is necessary to consider geometric nonlinearity and set a large deformation option when performing simulation analysis.

[0065] Furthermore, in one embodiment, before the force of a preset magnitude is applied to the vehicle door in the finite element simulation model and the displacement of the vehicle door is calculated by the finite element simulation model, the method further includes:

[0066] The CNTSTB card is used to apply damping springs of preset sizes in the contact tangential and normal directions to improve the convergence of the contact.

[0067] In this embodiment, the CNTSTB card is used to apply damping springs of preset sizes in the contact tangential and normal directions to improve the convergence of the contact. This is because the contact parts of the multiple components of the door hinge should be tightly fitted during design. However, when simulating according to the actual components, there may be gaps in the contact parts of the components, which may cause the finite element simulation model to fail to converge during calculation and solution. This problem can be solved by applying damping springs of preset sizes in the contact tangential and normal directions through the CNTSTB card.

[0068] Furthermore, in one embodiment, the hinge also includes a door end hinge seat, a vehicle body end hinge seat, a hinge arm and a rotating support rod, and the limiting mechanism also includes a hinge body limiting mechanism, and the hinge body limiting mechanism and the rubber pad together limit the excessive opening of the door.

[0069] In this embodiment, continue to refer to Figure 2 In addition to the limiting mechanism, the hinge may also include a door end hinge seat 1, a vehicle body end hinge seat 2, a hinge arm 3 and a rotating support rod 4. In addition to the rubber pad 6, the limiting mechanism may also include other limiting mechanisms, such as a hinge body limiting mechanism 5. The hinge body limiting mechanism 5 and the rubber pad 6 jointly limit the excessive opening of the door. The number of limiting mechanisms is not limited here, that is, the present application can be applied to doors and hinges with multiple limiting mechanisms. In addition, Figure 2 The hinge structure shown is for illustration only, and in actual application the hinge may include more component structures.

[0070] In this embodiment, the same test conditions are adopted, and a real over-opening test is carried out on the actual vehicle door and hinge through the test bench, and another traditional vehicle door over-opening simulation analysis is carried out through finite element simulation. The traditional vehicle door over-opening simulation analysis only sets the Poisson's ratio, density and thermal expansion coefficient for the rubber pad, and does not consider the tensile, compression and shear characteristic data of the rubber pad. The over-opening angles of the three doors are compared. The over-opening angle measured in the real over-opening test is 12°, the over-opening angle of the traditional vehicle door over-opening simulation analysis is 15.9°, and the over-opening angle of the present application is 11.4°. Through comparison, it can be seen that the error between the present application and the real over-opening test is 5%, and the error between the traditional vehicle door over-opening simulation analysis and the real over-opening test is 32.5%. Compared with the traditional vehicle door over-opening simulation analysis, the accuracy of the present application is improved by 27.5%, and the error with the real over-opening test is kept at a very low level.

[0071] In a second aspect, an embodiment of the present application also provides a door over-opening simulation analysis device.

[0072] In one embodiment, referring to Figure 7 , Figure 7 This is a functional module diagram of an embodiment of a door over-opening simulation analysis device of the present application. Figure 7As shown, the door over-opening simulation analysis device includes:

[0073] Establishing module 10, for establishing a finite element simulation model based on the geometric model of the door and hinge to be analyzed, wherein the hinge includes a limiting mechanism, and the limiting mechanism includes a rubber cushion;

[0074] An acquisition module 20 is used to acquire the tensile, compressive and shear characteristic data of the rubber cushion;

[0075] The simulation module 30 is used to load the tensile, compressive and shear characteristic data of the rubber cushion into the finite element simulation model, load a preset force on the door in the finite element simulation model, and calculate the displacement of the door through the finite element simulation model, wherein the preset force is loaded on the door to cause the door to over-open;

[0076] The determination module 40 is used to calculate the over-opening angle of the door according to the displacement of the door. If the over-opening angle of the door is greater than a preset angle, the detection result of the hinge and the limit mechanism is determined to be failed.

[0077] Furthermore, in one embodiment, a module 10 is established for:

[0078] Use finite element simulation model software to mesh the geometric model of the door and hinge to be analyzed;

[0079] In the finite element simulation model software, a connection relationship and a kinematic pair are established for the door and the hinge, a contact pair is established for the door and the hinge, material properties are set for the door and the hinge, boundary conditions are set for the door and the hinge, and a finite element simulation model of the door and the hinge is obtained.

[0080] Furthermore, in one embodiment, the acquisition module 20 is used to:

[0081] By carrying out uniaxial tensile test, equibiaxial extension test and plane tensile test on the rubber cushion respectively, the tensile, compression and shear characteristic data of the corresponding rubber cushion are obtained.

[0082] Furthermore, in one embodiment, the door over-opening simulation analysis device further includes a loading and setting module, which is used to:

[0083] The Poisson's ratio, density and thermal expansion coefficient of the rubber cushion are loaded into the finite element simulation model;

[0084] The rubber pad is set to large deformation in the finite element simulation model.

[0085] Furthermore, in one embodiment, the door over-opening simulation analysis device further includes an application module, which is used to:

[0086] The CNTSTB card is used to apply damping springs of preset sizes in the contact tangential and normal directions to improve the convergence of the contact.

[0087] Furthermore, in one embodiment, the hinge also includes a door end hinge seat, a vehicle body end hinge seat, a hinge arm and a rotating support rod, and the limiting mechanism also includes a hinge body limiting mechanism, and the hinge body limiting mechanism and the rubber pad together limit the excessive opening of the door.

[0088] Among them, the functional implementation of each module in the above-mentioned vehicle door over-opening simulation analysis device corresponds to the various steps in the above-mentioned vehicle door over-opening simulation analysis method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0089] In a third aspect, an embodiment of the present application provides a vehicle door over-opening simulation analysis device.

[0090] Reference Figure 8 , Figure 8 Schematic diagram of the hardware structure of the vehicle door over-opening simulation analysis device involved in the embodiment of the present application. In the embodiment of the present application, the vehicle door over-opening simulation analysis device may include a processor, a memory, a communication interface and a communication bus.

[0091] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0092] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the door over-opening simulation analysis device, and the interface used to realize the interconnection of the door over-opening simulation analysis device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display (Display), a keyboard (Keyboard), etc.

[0093] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0094] The processor may be a general-purpose processor, which may call the vehicle door over-opening simulation analysis program stored in the memory and execute the vehicle door over-opening simulation analysis method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the vehicle door over-opening simulation analysis program is called may refer to the various embodiments of the vehicle door over-opening simulation analysis method of the present application, which will not be described in detail here.

[0095] Those skilled in the art will understand that Figure 8 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0096] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0097] The readable storage medium of the present application stores a vehicle door over-opening simulation analysis program, wherein when the vehicle door over-opening simulation analysis program is executed by a processor, the steps of the vehicle door over-opening simulation analysis method as described above are implemented.

[0098] Among them, the method implemented when the vehicle door over-opening simulation analysis program is executed can refer to the various embodiments of the vehicle door over-opening simulation analysis method of the present application, and will not be repeated here.

[0099] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0100] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0101] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0102] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0103] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0104] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0105] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A door over-opening simulation analysis method, characterized in that: The door over-opening simulation analysis method comprises: A finite element simulation model is established based on the geometric model of the door and hinge to be analyzed, wherein the hinge includes a limiting mechanism, and the limiting mechanism includes a rubber cushion; Obtain the tensile, compressive and shear property data of the rubber pad; The tensile, compressive and shear characteristic data of the rubber cushion are loaded into the finite element simulation model, a preset force is loaded on the door in the finite element simulation model, and the displacement of the door is calculated by the finite element simulation model, wherein the preset force is loaded on the door to cause the door to over-open; The over-opening angle of the door is calculated based on the displacement of the door. If the over-opening angle of the door is greater than a preset angle, the inspection result of the hinge and the limit mechanism is determined to be failed.

2. The door over-opening simulation analysis method according to claim 1, characterized in that: The method of establishing a finite element simulation model based on the geometric model of the door and hinge to be analyzed includes: Use finite element simulation model software to mesh the geometric model of the door and hinge to be analyzed; In the finite element simulation model software, a connection relationship and a kinematic pair are established for the door and the hinge, a contact pair is established for the door and the hinge, material properties are set for the door and the hinge, boundary conditions are set for the door and the hinge, and a finite element simulation model of the door and the hinge is obtained.

3. The door over-opening simulation analysis method according to claim 1, characterized in that: The obtaining of the tensile, compressive and shearing characteristic data of the rubber cushion comprises: By carrying out uniaxial tensile test, equibiaxial extension test and plane tensile test on the rubber cushion respectively, the tensile, compression and shear characteristic data of the corresponding rubber cushion are obtained.

4. The door over-opening simulation analysis method according to claim 1, characterized in that: Before the vehicle door is loaded with a preset force in the finite element simulation model and the displacement of the vehicle door is calculated by the finite element simulation model, the method includes: The Poisson's ratio, density and thermal expansion coefficient of the rubber cushion are loaded into the finite element simulation model; The rubber pad is set to large deformation in the finite element simulation model.

5. The door over-opening simulation analysis method according to claim 1, characterized in that: Before the vehicle door is loaded with a preset force in the finite element simulation model and the displacement of the vehicle door is calculated by the finite element simulation model, the method further includes: The CNTSTB card is used to apply damping springs of preset sizes in the contact tangential and normal directions to improve the convergence of the contact.

6. The door over-opening simulation analysis method according to claim 1, characterized in that: The hinge also includes a door end hinge seat, a vehicle body end hinge seat, a hinge arm and a rotating support rod. The limiting mechanism also includes a hinge body limiting mechanism. The hinge body limiting mechanism and the rubber cushion jointly limit the excessive opening of the door.

7. A door over-opening simulation analysis device, characterized in that: The door over-opening simulation analysis device comprises: An establishment module is used to establish a finite element simulation model based on a geometric model of a door and a hinge to be analyzed, wherein the hinge includes a limiting mechanism, and the limiting mechanism includes a rubber cushion; An acquisition module is used to obtain the tensile, compressive and shear characteristic data of the rubber pad; A simulation module, used for loading the tensile, compressive and shear characteristic data of the rubber cushion into a finite element simulation model, loading a preset force on the door in the finite element simulation model, and calculating the displacement of the door through the finite element simulation model, wherein the preset force loaded on the door is used to cause the door to over-open; The determination module is used to calculate the over-opening angle of the door according to the displacement of the door. If the over-opening angle of the door is greater than a preset angle, the detection result of the hinge and the limit mechanism is determined to be failed.

8. The door over-opening simulation analysis device according to claim 7, characterized in that: The establishment module is used to: Use finite element simulation model software to mesh the geometric model of the door and hinge to be analyzed; In the finite element simulation model software, a connection relationship and a kinematic pair are established for the door and the hinge, a contact pair is established for the door and the hinge, material properties are set for the door and the hinge, boundary conditions are set for the door and the hinge, and a finite element simulation model of the door and the hinge is obtained.

9. A door over-opening simulation analysis device, characterized in that: The vehicle door over-opening simulation analysis device includes a processor, a memory, and a vehicle door over-opening simulation analysis program stored in the memory and executable by the processor, wherein when the vehicle door over-opening simulation analysis program is executed by the processor, the steps of the vehicle door over-opening simulation analysis method as described in any one of claims 1 to 6 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores a vehicle door over-opening simulation analysis program, wherein when the vehicle door over-opening simulation analysis program is executed by a processor, the steps of the vehicle door over-opening simulation analysis method as described in any one of claims 1 to 6 are implemented.

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