Design method of a sealing device, its design apparatus, and a rail vehicle

Abstract

The present application provides a design method for a sealing device, a design device thereof, and a rail vehicle, the method comprising: first, obtaining an analysis model of a contact-set seal and an assembly; then, according to the analysis model, determining the simulated contact stress and the stress range; thereafter, when the simulated contact stress is within the stress range, determining that the sealing effect of the seal is qualified, and determining that the sealing device is the final sealing device; finally, when the simulated contact stress is not within the stress range, determining that the sealing effect is unqualified, and adjusting the initial design parameters of the analysis model, so that the corresponding sealing effect of the adjusted analysis model is qualified, and the sealing device corresponding to the adjusted analysis model is the final sealing device. Determining whether the sealing performance of the seal is qualified based on the contact stress simulation analysis ensures that the sealing performance of the seal in the obtained sealing device is good, and ensures that the design cycle is short and the cost is low, and the overall design efficiency is high.

Description

Technical Field

[0001] The present application relates to the field of vehicles. Specifically, it relates to a design method of a sealing device, a design apparatus thereof, a computer-readable storage medium, a processor, and a rail vehicle. Background Technique

[0002] The sealing strip without sealant is convenient for maintenance and is widely used in the structures such as doors and windows of rail vehicles and automobiles. The sealing strip is required to be conveniently injection-molded, have a certain elasticity, appropriate hardness, small compression set, be not easy to decompose and age, and be able to maintain a good sealing state for a long time. Rubber is an elastic material with remarkable elasticity. Under the action of an external force, it can greatly change its size and undergo a large reversible deformation. This property of rubber makes it one of the main sealing structure materials and can actually be used as a contact seal for any kind of sealing structure. Currently, due to the combined effects of many factors such as existing materials, manufacturing processes, use environments, and costs, most existing sealing strips choose ethylene propylene diene monomer (EPDM) rubber as the main raw material. The reason why rubber can block the gap between the two surfaces to be sealed is due to its interaction on a certain actual contact surface. For the detection of its sealing effect and leakage situation, currently, the test detection method is mostly used. This method requires processing physical samples, has a long cycle and high cost, is not conducive to the modification of the scheme, and affects the project progress.

[0003] Therefore, there is an urgent need for a design method of a sealing strip to solve the problem of low design efficiency of the sealing strip in the prior art.

[0004] The above information disclosed in the background art section is only used to enhance the understanding of the background art of the technology described in this article. Therefore, the background art may contain certain information that is not prior art known to those skilled in the art in this country. Summary of the Invention

[0005] The main purpose of the present application is to provide a design method of a sealing device, a design apparatus thereof, a computer-readable storage medium, a processor, and a rail vehicle to solve the problem of low design efficiency of the sealing strip in the prior art.

[0006] According to one aspect of an embodiment of the present invention, a design method of a sealing device is provided, including: obtaining an analysis model of the sealing device, where the sealing device includes a seal and a fitting arranged in contact; determining a simulated contact stress and a stress range according to the analysis model, where the simulated contact stress is the contact stress value at the contact position obtained by simulation, the contact position is the position where the seal contacts the fitting, and the stress range is the stress range indicating that the sealing effect of the seal is qualified; in the case where the simulated contact stress is within the stress range, determining that the sealing effect of the seal is qualified and determining that the sealing device is the final sealing device; in the case where the simulated contact stress is not within the stress range, determining that the sealing effect is unqualified and adjusting the initial design parameters of the analysis model so that the sealing effect corresponding to the adjusted analysis model is qualified, and the sealing device corresponding to the adjusted analysis model is the final sealing device, and the initial design parameters include dimension data, assembly tolerance, and material properties.

[0007] Optionally, obtaining an analysis model of the sealing device includes: obtaining the initial design parameters; establishing a target geometric model of the sealing device according to the initial design parameters; and performing finite element analysis on the target geometric model to obtain the analysis model.

[0008] Optionally, performing finite element analysis on the target geometric model to obtain the analysis model includes: in the case where the target geometric model is a three-dimensional model, performing hexahedral element mesh division on the target geometric model to obtain the analysis model; in the case where the target geometric model is a two-dimensional model, performing tetrahedral element mesh division on the target geometric model to obtain the analysis model.

[0009] Optionally, determining the simulated contact stress according to the analysis model includes: obtaining actual load parameters, material properties, and the corresponding friction coefficient, where the actual load parameters are the forces directly applied to the seal during the use of the sealing device, the material properties are the parameters of the equivalent material of the seal during the use of the sealing device, and the friction coefficient is the friction coefficient at the contact position; and obtaining the simulated contact stress according to the actual load parameters, the material properties, the corresponding friction coefficient, and the analysis model.

[0010] Optionally, determining the stress range according to the analysis model includes: obtaining boundary conditions, where the boundary conditions are the test conditions corresponding to the start of water leakage of a historical sealing device during a rain test; obtaining the critical contact stress of the analysis model under the boundary conditions, and the stress range is the range greater than the critical contact stress.

[0011] Optionally, the analysis model is used to simulate the boundary conditions, and the critical contact stress corresponding to the boundary conditions is calculated, including: obtaining the critical contact stress of the analysis model under the boundary conditions; obtaining a first contact stress and a second contact stress, the first contact stress and the second contact stress being preset stress values, the first contact stress being used to characterize the minimum stress value corresponding to when the seal is installed on the fitting, the second contact stress being used to characterize the minimum stress value corresponding to when the seal has been used for a preset duration, both the first contact stress and the second contact stress being greater than the critical contact stress; determining the ratio of the first contact stress to the critical contact stress as the first safety factor, and the ratio of the second contact stress to the critical contact stress as the second safety factor, the stress range corresponding to when the seal is installed on the fitting being a range greater than the first safety factor, and the stress range corresponding to when the seal has been used for the preset duration being a range greater than the second safety factor.

[0012] Optionally, the material properties include a first sub-material property and a second sub-material property, the first sub-material property being the equivalent material parameters when the seal is installed on the fitting, the second sub-material property being the equivalent material parameters when the seal has been used for the preset duration. According to the actual load parameters, the material properties, the corresponding friction coefficient, and the analysis model, the simulated contact stress is obtained, including: obtaining a first contact stress according to the actual load parameters, the first sub-material property, the corresponding friction coefficient, and the analysis model; obtaining a second contact stress according to the actual load parameters, the second sub-material property, the corresponding friction coefficient, and the analysis model; obtaining a first ratio of the first contact stress to the critical contact stress, and a second ratio of the second contact stress to the critical contact stress.

[0013] According to another aspect of the embodiments of the present invention, there is also provided a design device for a sealing device. The design device for the sealing device includes an acquisition unit, a first determination unit, a second determination unit, and a third determination unit. Among them, the acquisition unit is configured to acquire an analysis model of the sealing device, and the sealing device includes a seal and a fitting arranged in contact; the first determination unit is configured to determine a simulated contact stress and a stress range according to the analysis model, where the simulated contact stress is the contact stress value at the contact position obtained by simulation, the contact position is the position where the seal contacts the fitting, and the stress range is the stress range indicating that the sealing effect of the seal is qualified; the second determination unit is configured to determine that the sealing effect of the seal is qualified and determine that the sealing device is the final sealing device when the simulated contact stress is within the stress range; the third determination unit is configured to determine that the sealing effect is unqualified when the simulated contact stress is not within the stress range, and adjust the initial design parameters of the analysis model so that the sealing effect corresponding to the adjusted analysis model is qualified, and the sealing device corresponding to the adjusted analysis model is the final sealing device, and the initial design parameters include dimensional data, assembly tolerances, and material properties.

[0014] According to still another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium. The computer-readable storage medium includes a stored program, where the program is configured to execute any one of the methods.

[0015] According to yet another aspect of the embodiments of the present invention, there is also provided a processor. The processor is configured to run a program, where the program executes any one of the methods when running.

[0016] According to still another aspect of the embodiments of the present invention, there is also provided a rail vehicle. The rail vehicle includes a door and a window, and the door and / or the window is designed by using any one of the methods.

[0017] In the embodiment of the present invention, in the design method of the sealing device, first, an analysis model of the sealing member and the fitting in contact setting is obtained; then, according to the analysis model, the simulated contact stress and the stress range are determined, wherein the simulated contact stress is the contact stress value at the contact position between the sealing member and the fitting obtained by simulation, and the stress range is the stress range indicating that the sealing effect of the sealing member is qualified; after that, when the simulated contact stress is within the stress range, it is determined that the sealing effect of the sealing member is qualified, and the sealing device is determined as the final sealing device; finally, when the simulated contact stress is not within the stress range, it is determined that the sealing effect is unqualified, and the initial design parameters of the analysis model are adjusted so that the sealing effect corresponding to the adjusted analysis model is qualified, and the sealing device corresponding to the adjusted analysis model is the final sealing device, and the initial design parameters include dimension data, assembly tolerance, and material properties. Compared with the problem of low design efficiency of the sealing strip in the prior art, the design method of the sealing device of the present application determines the simulated contact stress and the stress range through the analysis model, and then determines whether the sealing effect of the sealing member is qualified by comparing whether the contact stress is within the stress range. And when the simulated contact stress is not within the stress range, by adjusting the initial design parameters of the analysis model, the sealing effect of the adjusted sealing member is qualified, realizing the determination of whether the sealing performance of the sealing member is qualified based on the simulated analysis of the contact stress, ensuring that the sealing performance of the sealing member in the sealing device obtained by the method is better, avoiding the problem of long design cycle and high cost of the sealing member caused by the need to conduct physical sample testing in the prior art, ensuring a shorter design cycle and lower cost, and ensuring a higher overall design efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0019] Figure 1 The flowchart of the design method of the sealing device according to the embodiment of the present application is shown;

[0020] Figure 2 The schematic diagram of the contact pressure relationship according to the embodiment of the present application is shown;

[0021] Figure 3 The schematic diagram of the design device of the sealing device according to the embodiment of the present application is shown;

[0022] Figure 4 The flowchart of the design device of the sealing device according to the embodiment of the present application is shown. Detailed implementation manners

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present application described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element can be directly on the other element, or there may also be an intermediate element. Moreover, in the specification and claims, when an element is described as "connected" to another element, the element can be "directly connected" to the other element, or "connected" to the other element through a third element.

[0027] As mentioned in the background art, the design efficiency of the existing sealing rubber strip is low. To solve the above problems, in a typical implementation manner of the present application, a design method of a sealing device, its design device, a computer-readable storage medium, a processor, and a rail vehicle are provided.

[0028] According to an embodiment of the present application, a design method of a sealing device is provided.

[0029] Figure 1 is a flowchart of a design method of a sealing device according to an embodiment of the present application. As Figure 1 shown, the method includes the following steps:

[0030] Step S101: Obtain an analysis model of the sealing device, where the sealing device includes a seal and a fitting that are in contact with each other;

[0031] Step S102: According to the above analysis model, determine the simulated contact stress and the stress range. Among them, the simulated contact stress is the contact stress value at the contact position obtained by simulation, the contact position is the position where the seal contacts the fitting, and the stress range is the stress range indicating that the sealing effect of the seal is qualified;

[0032] Step S103: When the simulated contact stress is within the stress range, determine that the sealing effect of the seal is qualified and determine that the sealing device is the final sealing device;

[0033] Step S104: When the simulated contact stress is not within the stress range, determine that the sealing effect is unqualified, and adjust the initial design parameters of the analysis model so that the sealing effect corresponding to the adjusted analysis model is qualified. The sealing device corresponding to the adjusted analysis model is the final sealing device, and the initial design parameters include dimensional data, assembly tolerances, and material properties.

[0034] In the design method of the above-mentioned sealing device, first, an analysis model of the seal and the fitting in contact setting is obtained; then, based on the above analysis model, the simulated contact stress and the stress range are determined, where the above simulated contact stress is the contact stress value at the contact position between the above-mentioned seal and the above-mentioned fitting obtained by simulation, and the above stress range is the stress range indicating that the sealing effect of the above-mentioned seal is qualified; after that, when the above simulated contact stress is within the above stress range, it is determined that the sealing effect of the above-mentioned seal is qualified, and the above-mentioned sealing device is determined as the final sealing device; finally, when the above simulated contact stress is not within the above stress range, it is determined that the above sealing effect is unqualified, and the initial design parameters of the above analysis model are adjusted so that the sealing effect corresponding to the adjusted above analysis model is qualified, and the above-mentioned sealing device corresponding to the adjusted above analysis model is the final sealing device. The above initial design parameters include dimensional data, assembly tolerances, and material properties. Compared with the problem of low design efficiency of the sealing strip in the prior art, in the design method of the above-mentioned sealing device of the present application, the simulated contact stress and the above stress range are determined through the analysis model, and then by comparing whether the above contact stress is within the above stress range, it is determined whether the sealing effect of the above-mentioned seal is qualified. And when the above simulated contact stress is not within the above stress range, by adjusting the initial design parameters of the above analysis model, the sealing effect of the adjusted above-mentioned seal is qualified, realizing the determination of whether the sealing performance of the seal is qualified based on the simulation analysis of the contact stress, ensuring that the sealing performance of the seal in the above-mentioned sealing device obtained by the above method is better, avoiding the problem of long design cycle and high cost of the seal caused by the need to conduct physical sample processing for entity detection in the prior art, ensuring that the above design cycle is shorter and the cost is lower, and ensuring higher overall design efficiency.

[0035] In the actual application process, the above-mentioned seal includes a sealing strip without sealant.

[0036] In a specific embodiment, the above dimensional data represents the dimensions of the above-mentioned seal and the above-mentioned fitting in the above-mentioned sealing device, the above assembly tolerance represents the fitting accuracy between the above-mentioned seal and the above-mentioned fitting, which is the allowable variation of the clearance or interference between the seal and the fitting, and the above material property represents the characteristic properties (i.e., the inherent properties of the material itself) and functional properties (i.e., the properties that convert this action into another form of function when a certain action is applied to the material under certain conditions and within a certain limit) of the materials used for the above-mentioned seal and the above-mentioned fitting.

[0037] According to a specific embodiment of the present application, obtaining an analysis model of a sealing device includes: obtaining the above initial design parameters; establishing the target geometric model of the above sealing device according to the above initial design parameters; performing finite element analysis on the above target geometric model to obtain the above analysis model. By establishing the target geometric model of the above sealing device and performing finite element analysis on the above target geometric model, the simulation optimization of the design of the sealing device is further realized, the problem of low design efficiency of the sealing strip in the prior art is further avoided, and the design cycle of the above sealing device is further ensured to be short and the design cost is low.

[0038] In a specific embodiment, the specific process of performing finite element analysis on the above target geometric model is as follows: establishing the above geometric model in Abaqus (general finite element analysis software), and Abaqus includes a rich unit library that can simulate any geometric shape and has various types of material model libraries, which can simulate the performance of typical engineering materials.

[0039] Specifically, finite element analysis is to use a mathematical approximation method to simulate the sealed device. By using the above-mentioned interacting seals and the above-mentioned fittings, a finite number of unknowns can be used to approximate the infinite unknowns of the real above-mentioned sealing device.

[0040] According to another specific embodiment of the present application, performing finite element analysis on the above target geometric model to obtain the above analysis model includes: in the case where the above target geometric model is a three-dimensional model, performing hexahedral element mesh division on the above target geometric model to obtain the above analysis model; in the case where the above target geometric model is a two-dimensional model, performing tetrahedral element mesh division on the above target geometric model to obtain the above analysis model.

[0041] In a specific embodiment, the above three-dimensional model is meshed by the sweeping method and simulated by hexahedral elements, the above two-dimensional model is simulated by tetrahedral elements, and the mesh is refined mainly at the above contact positions. The above mesh division is performed using Abaqus software or Hypermesh software. Of course, other software with the same function can also be used to complete the above mesh division.

[0042] According to another specific embodiment of the present application, based on the above analysis model, determining the simulated contact stress includes: obtaining actual load parameters, material properties, and the corresponding friction coefficient. The actual load parameters are the forces directly applied to the seal during the use of the above-mentioned sealing device. The material properties are the parameters of the equivalent material of the seal during the use of the above-mentioned sealing device. The friction coefficient is the friction coefficient at the contact position; based on the above actual load parameters, the above material properties, the corresponding above friction coefficient, and the above analysis model, the above simulated contact stress is obtained. In this embodiment, the above simulated contact stress is determined according to the obtained actual load parameters, material properties, and the corresponding friction coefficient, so that the above simulated contact stress is relatively close to the contact stress between the seal and the fitting during the actual use of the above-mentioned sealing device, ensuring that the above simulated contact stress is relatively realistic. While further ensuring a relatively short design cycle of the above-mentioned sealing device, it further ensures that the sealing effect of the above-mentioned sealing device obtained by the method of the present application is better.

[0043] Specifically, the above simulated contact stress is obtained by assigning the above actual load parameters, the above material properties, and the corresponding above friction coefficient to the above analysis model.

[0044] In a specific embodiment, the above friction parameter is obtained by conducting a sliding friction test using a counter plate made of the same material as the seal and the fitting.

[0045] In order to further ensure a relatively short design cycle of the above-mentioned sealing device, according to a specific embodiment of the present application, based on the above analysis model, determining the stress range includes: obtaining boundary conditions, where the boundary conditions are the test conditions corresponding to the historical sealing device starting to leak during the rain test; obtaining the critical contact stress of the above analysis model under the above boundary conditions, and the stress range is the range greater than the critical contact stress. By obtaining the above test conditions when the historical sealing device starts to leak during the rain test, determining the above critical contact stress, and then determining that the above stress range is the range greater than the critical contact stress, it ensures that the above stress range can meet the requirement of not leaking during actual application, and further ensures that the sealing effect of the above-mentioned sealing device determined according to the above stress range is better. In this way, it further avoids the problem of low design efficiency caused by the proofing test of the sealing device, and further ensures a relatively short design cycle and low cost of the above-mentioned sealing device.

[0046] The above boundary conditions are obtained by fixing the vehicle body and the interior trim panel, achieving interference fit between the seal and the vehicle body, the fitting, and the window, and then applying a rain test on the window.

[0047] To further ensure better sealing effect of the above-mentioned sealing device, according to another specific embodiment of the present application, the above-mentioned analysis model is used to simulate the above-mentioned boundary conditions, and the critical contact stress corresponding to the above-mentioned boundary conditions is calculated, including: obtaining the above-mentioned critical contact stress of the above-mentioned analysis model under the above-mentioned boundary conditions; obtaining the first contact stress and the second contact stress, the first contact stress and the second contact stress are preset stress values, the first contact stress is used to characterize the minimum stress value corresponding to the installation of the above-mentioned seal to the above-mentioned fitting, and the second contact stress is used to characterize the minimum stress value corresponding to the above-mentioned seal after using a preset time length, both the first contact stress and the second contact stress are greater than the above-mentioned critical contact stress; determining the ratio of the first contact stress to the above-mentioned critical contact stress as the first safety factor, and the ratio of the second contact stress to the above-mentioned critical contact stress as the second safety factor, the stress range corresponding to the installation of the above-mentioned seal to the above-mentioned fitting is a range greater than the first safety factor, and the stress range corresponding to the above-mentioned seal after using the above-mentioned preset time length is a range greater than the second safety factor. By obtaining the first contact stress and the second contact stress, and both the first contact stress and the second contact stress are greater than the above-mentioned critical contact stress, and then by determining the first safety factor and the second safety factor, and determining the above-mentioned stress range according to the first safety factor and the second safety factor, that is, while the present application meets the standard of no water leakage of the sealing device, considering the change of contact stress in the initial stage of the use of the seal and after using a preset period in the actual working condition, it is ensured that the obtained above-mentioned stress range can meet the sealing effect requirements in the initial stage of the installation of the above-mentioned seal and after using the above-mentioned preset time length, and further ensures better sealing effect of the above-mentioned sealing device determined according to the above-mentioned stress range.

[0048] In a specific embodiment, the first contact stress and the second contact stress are obtained by combining the above method with the actual wind pressure, rain pressure, acceleration and other load conditions of the above-mentioned sealing device.

[0049] Specifically, as Figure 2 shown, the minimum stress value corresponding to the installation of the above-mentioned seal to the above-mentioned fitting is A; after the above-mentioned seal uses the above-mentioned preset time length t and undergoes stress relaxation and is basically stable, the corresponding contact stress value is B; the above-mentioned critical contact pressure is C, and both the first contact stress A and the second contact stress B are greater than the critical contact stress standard C to ensure the qualified sealing performance of the above-mentioned seal.

[0050] According to another specific embodiment of the present application, the above material properties include a first sub-material property and a second sub-material property. The first sub-material property is the equivalent material parameter when the above seal is installed on the above fitting, and the second sub-material property is the equivalent material parameter after the above seal has been used for the above predetermined duration. According to the above actual load parameters, the above material properties, the corresponding above friction coefficient, and the above analysis model, the above simulated contact stress is obtained, including: obtaining a first contact stress according to the above actual load parameters, the above first sub-material property, the corresponding above friction coefficient, and the above analysis model; obtaining a second contact stress according to the above actual load parameters, the above second sub-material property, the corresponding above friction coefficient, and the above analysis model; obtaining a first ratio of the above first contact stress to the above critical contact stress, and a second ratio of the above second contact stress to the above critical contact stress. According to the two situations of the initial stage when the above seal is installed on the above fitting and the later stage when it has been used for the above predetermined duration, the above material properties are determined to be the above first sub-material property and the above second sub-material property, and the above simulated contact pressure is determined according to the two different above material properties, ensuring that the above first contact stress and the above second contact stress are closer to the actual use situation of the above sealing device, and further ensuring the simulation authenticity and accuracy of the above contact stress.

[0051] Of course, in the actual application process, it is not limited to the above first sub-material property and the above second sub-material property. In order to have a higher simulation accuracy, those skilled in the art can also set multiple sub-material properties.

[0052] In a specific embodiment, the above first sub-material property adopts hyperelastic constitutive parameters, which are obtained by fitting the uniaxial tension, biaxial tension, plane shear, and volume compression test data. The above second sub-material property adopts the above hyperelastic constitutive parameters and viscoelastic constitutive parameters, where the above viscoelastic constitutive parameters are obtained by fitting the stress relaxation test data.

[0053] The embodiment of the present application also provides a design device for a sealing device. It should be noted that the design device for the sealing device in the embodiment of the present application can be used to execute the design method for the sealing device provided in the embodiment of the present application. The following introduces the design device for the sealing device provided in the embodiment of the present application.

[0054] Figure 3 is a schematic diagram of the design device for the sealing device according to the embodiment of the present application. As Figure 3As shown, the device includes an acquisition unit 10, a first determination unit 20, a second determination unit 30, and a third determination unit 40. Among them, the acquisition unit 10 is used to acquire an analysis model of a sealing device, and the sealing device includes a seal and a fitting arranged in contact; the first determination unit 20 is used to determine a simulated contact stress and a stress range according to the analysis model, where the simulated contact stress is the contact stress value at the contact position obtained by simulation, the contact position is the position where the seal contacts the fitting, and the stress range is the stress range indicating that the sealing effect of the seal is qualified; the second determination unit 30 is used to determine that the sealing effect of the seal is qualified and determine that the sealing device is the final sealing device when the simulated contact stress is within the stress range; the third determination unit 40 is used to determine that the sealing effect is unqualified when the simulated contact stress is not within the stress range, and adjust the initial design parameters of the analysis model so that the sealing effect corresponding to the adjusted analysis model is qualified, and the sealing device corresponding to the adjusted analysis model is the final sealing device. The initial design parameters include dimension data, assembly tolerance, and material properties.

[0055] In the design device of the above-mentioned sealing equipment, an analysis model of the seal and the fitting in contact setting is obtained through the above-mentioned acquisition unit; according to the above-mentioned analysis model, the simulation contact stress and the stress range are determined through the above-mentioned first determination unit, wherein the above-mentioned simulation contact stress is the contact stress value at the contact position between the above-mentioned seal and the above-mentioned fitting obtained by simulation, and the above-mentioned stress range is the stress range indicating that the sealing effect of the above-mentioned seal is qualified; through the above-mentioned second determination unit, when the above-mentioned simulation contact stress is within the above-mentioned stress range, it is determined that the sealing effect of the above-mentioned seal is qualified, and the above-mentioned sealing equipment is determined as the final sealing equipment; through the above-mentioned third determination unit, when the above-mentioned simulation contact stress is not within the above-mentioned stress range, it is determined that the above-mentioned sealing effect is unqualified, and the initial design parameters of the above-mentioned analysis model are adjusted so that the sealing effect corresponding to the adjusted above-mentioned analysis model is qualified, and the above-mentioned sealing equipment corresponding to the adjusted above-mentioned analysis model is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerance, and material properties. Compared with the problem of low design efficiency of the sealing strip in the prior art, the design device of the above-mentioned sealing equipment in the present application determines the above-mentioned simulation contact stress and the above-mentioned stress range through the analysis model, and then determines whether the sealing effect of the above-mentioned seal is qualified by comparing whether the above-mentioned contact stress is within the above-mentioned stress range. And when the above-mentioned simulation contact stress is not within the above-mentioned stress range, by adjusting the initial design parameters of the above-mentioned analysis model, the sealing effect of the adjusted above-mentioned seal is qualified, realizing the determination of whether the sealing performance of the seal is qualified based on the simulation analysis of the contact stress, ensuring that the sealing performance of the seal in the above-mentioned sealing equipment obtained by the above-mentioned device is good, avoiding the problem of long design cycle and high cost of the seal caused by the need to conduct physical sample processing for entity detection in the prior art, ensuring that the above-mentioned design cycle is short and the cost is low, and ensuring high overall design efficiency.

[0056] In the actual application process, the above-mentioned seal includes a sealing strip without sealant.

[0057] In a specific embodiment, the above-mentioned dimensional data represents the dimensions of the above-mentioned seal and the above-mentioned fitting in the above-mentioned sealing equipment, the above-mentioned assembly tolerance represents the fitting accuracy between the above-mentioned seal and the above-mentioned fitting, which is the allowable variation of the clearance or interference between the seal and the fitting, and the above-mentioned material properties represent the characteristic properties (i.e., the inherent properties of the material itself) and functional properties (i.e., the properties of converting a certain action into another form of function through the material when a certain action is applied to the material under certain conditions and within a certain limit) of the materials used for the above-mentioned seal and the above-mentioned fitting.

[0058] According to a specific embodiment of the present application, the above-mentioned acquisition unit includes a first acquisition module, a building module, and an analysis module. Among them, the above-mentioned first acquisition module is used to acquire the above-mentioned initial design parameters; the above-mentioned building module is used to build the target geometric model of the above-mentioned sealing device according to the above-mentioned initial design parameters; the above-mentioned analysis module is used to perform finite element analysis on the above-mentioned target geometric model to obtain the above-mentioned analysis model. By building the target geometric model of the above-mentioned sealing device and performing finite element analysis on the above-mentioned target geometric model, the simulation optimization of the design of the sealing device is further realized, the problem of low design efficiency of the sealing strip in the prior art is further avoided, and the design cycle of the above-mentioned sealing device is further ensured to be short and the design cost is low.

[0059] In a specific embodiment, the specific process of performing finite element analysis on the above-mentioned target geometric model is as follows: The above-mentioned geometric model is built in Abaqus (general finite element analysis software). Abaqus includes a rich unit library that can simulate any geometric shape and has various types of material model libraries, and can simulate the performance of typical engineering materials.

[0060] Specifically, finite element analysis uses a mathematical approximation method to simulate the sealed device. By using the above-mentioned interacting seals and the above-mentioned fittings, a finite number of unknowns can be used to approximate the truly infinite unknowns of the above-mentioned sealing device.

[0061] According to another specific embodiment of the present application, the above-mentioned analysis module includes a first sub-division module and a second sub-division module. Among them, the above-mentioned first sub-division module is used to perform hexahedral element mesh division on the above-mentioned target geometric model to obtain the above-mentioned analysis model when the above-mentioned target geometric model is a three-dimensional model; the above-mentioned second sub-division module is used to perform tetrahedral element mesh division on the above-mentioned target geometric model to obtain the above-mentioned analysis model when the above-mentioned target geometric model is a two-dimensional model.

[0062] In a specific embodiment, the above-mentioned three-dimensional model is meshed using the sweeping method and simulated using hexahedral elements. The above-mentioned two-dimensional model is simulated using tetrahedral elements, and the mesh of the above-mentioned contact position is refined. The above-mentioned mesh division is performed using Abaqus software or Hypermesh software. Of course, other software with the same function can also be used to complete the above-mentioned mesh division.

[0063] According to another specific embodiment of the present application, the above first determination unit includes a second acquisition module and a processing module. Among them, the second acquisition module is used to acquire actual load parameters, material properties, and corresponding friction coefficients. The actual load parameter is the force directly applied to the above seal during the use of the above sealing device. The material property is the parameter of the equivalent material of the above seal during the use of the above sealing device. The friction coefficient is the friction coefficient at the above contact position. The processing module is used to obtain the above simulation contact stress according to the above actual load parameter, the above material property, the corresponding above friction coefficient, and the above analysis model. In this embodiment, the above simulation contact stress is determined according to the acquired above actual load parameter, material property, and corresponding friction coefficient, so that the above simulation contact stress is relatively close to the contact stress between the above seal and the above fitting during the actual use of the above sealing device, ensuring that the above simulation contact stress has strong authenticity. While further ensuring a relatively short design cycle of the above sealing device, it further ensures that the sealing effect of the above sealing device obtained by the above device of the present application is better.

[0064] Specifically, the above simulation contact stress is obtained by assigning the above actual load parameter, the above material property, and the corresponding above friction coefficient to the above analysis model.

[0065] In a specific embodiment, the above friction parameter is obtained by performing a sliding friction test using a counterface plate with the same material as the above seal and the above fitting.

[0066] In order to further ensure a relatively short design cycle of the above sealing device, according to a specific embodiment of the present application, the above first determination unit further includes a third acquisition module and a fourth acquisition module. Among them, the third acquisition module is used to acquire boundary conditions. The boundary conditions are the test conditions corresponding to when the historical sealing device starts to leak water during the rain test. The fourth acquisition module is used to acquire the critical contact stress of the above analysis model under the above boundary conditions. The stress range is the range greater than the above critical contact stress. By acquiring the above test conditions when the historical sealing device starts to leak water during the rain test, the above critical contact stress is determined, and then the stress range greater than the above critical contact stress is determined, ensuring that the above stress range can meet the requirement of no water leakage during the actual application process, and further ensuring that the sealing effect of the above sealing device determined according to the above stress range is better. In this way, the problem of low design efficiency caused by the proofing test of the sealing device is further avoided, and the design cycle of the above sealing device is further ensured to be relatively short and the cost is relatively low.

[0067] The above boundary conditions are obtained by fixing the vehicle body and the interior trim panel, achieving interference fit between the above seal and the vehicle body, the above fitting, and the window, and then applying a rain test on the window.

[0068] To further ensure better sealing effect of the above-mentioned sealing device, according to another specific embodiment of the present application, the above-mentioned fourth acquisition module includes a first acquisition sub-module, a second acquisition sub-module and a determination sub-module. Among them, the above-mentioned first acquisition sub-module is used to acquire the above-mentioned critical contact stress of the above-mentioned analysis model under the above-mentioned boundary conditions; the above-mentioned second acquisition sub-module is used to acquire a first contact stress and a second contact stress, and the above-mentioned first contact stress and the above-mentioned second contact stress are preset stress values. The above-mentioned first contact stress is used to characterize the minimum stress value corresponding to when the above-mentioned seal is installed on the above-mentioned fitting, and the above-mentioned second contact stress is used to characterize the minimum stress value corresponding to after the above-mentioned seal has been used for a preset duration. Both the above-mentioned first contact stress and the above-mentioned second contact stress are greater than the above-mentioned critical contact stress; the above-mentioned determination sub-module is used to determine that the ratio of the above-mentioned first contact stress to the above-mentioned critical contact stress is the first safety factor, and the ratio of the above-mentioned second contact stress to the above-mentioned critical contact stress is the second safety factor. The above-mentioned stress range corresponding to when the above-mentioned seal is installed on the above-mentioned fitting is a range greater than the above-mentioned first safety factor, and the above-mentioned stress range corresponding to after the above-mentioned seal has been used for the above-mentioned preset duration is a range greater than the above-mentioned second safety factor. By acquiring the above-mentioned first contact stress and the above-mentioned second contact stress, and at the same time both the above-mentioned first contact stress and the above-mentioned second contact stress are greater than the above-mentioned critical contact stress, and then by determining the above-mentioned first safety factor and the above-mentioned second safety factor, and determining the above-mentioned stress range according to the above-mentioned first safety factor and the above-mentioned second safety system, that is, while the present application meets the standard of the sealing device not leaking water, it considers the change of contact stress in the initial stage of using the seal and after using a preset period in the actual working condition, ensuring that the obtained above-mentioned stress range can meet the sealing effect requirements in the initial stage of installing the above-mentioned seal and after using the above-mentioned preset duration, and further ensuring better sealing effect of the above-mentioned sealing device determined according to the above-mentioned stress range.

[0069] In a specific embodiment, the above-mentioned first contact stress and the above-mentioned second contact stress are obtained by combining the above-mentioned device with the actual wind pressure, rain pressure, acceleration and other load conditions of the above-mentioned sealing device.

[0070] Specifically, as Figure 2 shown, the minimum stress value corresponding to when the above-mentioned seal is installed on the above-mentioned fitting is A; after the above-mentioned seal has been used for the above-mentioned preset duration t and stress relaxation occurs and is basically stable, the corresponding contact stress value is B; the above-mentioned critical contact pressure is C. Only when both the above-mentioned first contact stress A and the above-mentioned second contact stress B are greater than the critical contact stress standard C can the sealing performance of the above-mentioned seal be qualified.

[0071] According to another specific embodiment of the present application, the above material properties include a first sub-material property and a second sub-material property. The first sub-material property is the equivalent material parameter when the above seal is installed on the above fitting, and the second sub-material property is the equivalent material parameter after the above seal has been used for the above predetermined duration. The above processing module includes a first processing sub-module, a second processing sub-module, and a third acquisition sub-module. Among them, the first processing sub-module is used to obtain a first contact stress according to the above actual load parameter, the above first sub-material property, the corresponding above friction coefficient, and the above analysis model; the second processing sub-module is used to obtain a second contact stress according to the above actual load parameter, the above second sub-material property, the corresponding above friction coefficient, and the above analysis model; the third acquisition sub-module is used to obtain a first ratio of the above first contact stress to the above critical contact stress, and a second ratio of the above second contact stress to the above critical contact stress. According to the two situations of the initial stage when the above seal is installed on the above fitting and the later stage when it has been used for the above predetermined duration, the above material properties are determined to be the above first sub-material property and the above second sub-material property, and the above simulated contact pressure is determined according to the two different above material properties, ensuring that the above first contact stress and the above second contact stress are closer to the actual use situation of the above sealing device, and further ensuring the simulation authenticity and accuracy of the above contact stress.

[0072] Of course, in the actual application process, it is not limited to the above first sub-material property and the above second sub-material property. In order to have a higher simulation accuracy, those skilled in the art can also set multiple sub-material properties.

[0073] In a specific embodiment, the above first sub-material property adopts hyperelastic constitutive parameters, which are obtained by fitting through uniaxial tension, biaxial tension, plane shear, and volume compression test data. The above second sub-material property adopts the above hyperelastic constitutive parameters and viscoelastic constitutive parameters, where the above viscoelastic constitutive parameters are obtained by fitting through stress relaxation test data.

[0074] The design device of the above sealing device includes a processor and a memory. The above acquisition unit, the above first determination unit, the above second determination unit, and the above third determination unit are all stored in the memory as program units, and the processor executes the above program units stored in the memory to implement corresponding functions.

[0075] The processor contains a kernel, and the kernel retrieves the corresponding program units from the memory. One or more kernels can be set, and by adjusting the kernel parameters, the problem of low design efficiency of the existing sealing strip can be solved.

[0076] The memory may include non - permanent memory in the form of computer - readable media, such as random access memory (RAM) and / or non - volatile memory, such as read - only memory (ROM) or flash RAM. The memory includes at least one memory chip.

[0077] An embodiment of the present invention provides a computer - readable storage medium, on which a program is stored. When the program is executed by a processor, it implements the design method of the above - mentioned sealing device.

[0078] An embodiment of the present invention provides a processor for running a program. When the program runs, it executes the design method of the above - mentioned sealing device.

[0079] An embodiment of the present invention provides a device, which includes a processor, a memory, and a program stored on the memory and executable on the processor. When the processor executes the program, it implements at least the following steps:

[0080] Step S101: Obtain an analysis model of the sealing device, where the sealing device includes a seal and a fitting arranged in contact.

[0081] Step S102: According to the above - mentioned analysis model, determine the simulated contact stress and the stress range. The simulated contact stress is the contact stress value at the contact position obtained by simulation. The contact position is the position where the seal contacts the fitting, and the stress range is the stress range indicating that the sealing effect of the seal is qualified.

[0082] Step S103: When the simulated contact stress is within the above - mentioned stress range, determine that the sealing effect of the seal is qualified and determine that the sealing device is the final sealing device.

[0083] Step S104: When the simulated contact stress is not within the above - mentioned stress range, determine that the sealing effect is unqualified, and adjust the initial design parameters of the above - mentioned analysis model so that the sealing effect corresponding to the adjusted analysis model is qualified. The sealing device corresponding to the adjusted analysis model is the final sealing device. The initial design parameters include dimension data, assembly tolerance, and material properties.

[0084] The device in this article can be a server, a PC, a PAD, a mobile phone, etc.

[0085] This application also provides a computer program product. When executed on a data - processing device, it is adapted to execute a program initialized with at least the following method steps:

[0086] Step S101: Obtain an analysis model of the sealing device, where the sealing device includes a seal and a fitting arranged in contact.

[0087] Step S102: Determine the simulated contact stress and the stress range according to the above analysis model, where the simulated contact stress is the contact stress value at the contact position obtained by simulation, the contact position is the position where the seal contacts the fitting, and the stress range is the stress range indicating that the sealing effect of the seal is qualified.

[0088] Step S103: When the simulated contact stress is within the stress range, determine that the sealing effect of the seal is qualified and determine that the sealing device is the final sealing device.

[0089] Step S104: When the simulated contact stress is not within the stress range, determine that the sealing effect is unqualified, and adjust the initial design parameters of the analysis model so that the sealing effect corresponding to the adjusted analysis model is qualified, and the sealing device corresponding to the adjusted analysis model is the final sealing device. The initial design parameters include dimension data, assembly tolerances, and material properties.

[0090] According to another typical embodiment of the present application, a rail vehicle is further provided. The rail vehicle includes a door and a window, and the door and / or the window are designed by using any one of the above methods.

[0091] For the above rail vehicle, which includes a door and a window, and the door and / or the window are designed by using any one of the above methods. Compared with the problem of low design efficiency of the sealing strip in the prior art, in the above rail vehicle of the present application, the simulated contact stress and the stress range are determined through the analysis model, and then whether the contact stress is within the stress range is compared to determine whether the sealing effect of the seal is qualified. And when the simulated contact stress is not within the stress range, by adjusting the initial design parameters of the analysis model, the sealing effect of the adjusted seal is qualified, realizing the determination of whether the sealing performance of the seal is qualified based on the simulation analysis of the contact stress, ensuring that the seal in the sealing device obtained by the above method has good sealing performance, avoiding the problem of long design cycle and high cost of the seal caused by the need to conduct physical sample processing for entity detection in the prior art, ensuring a shorter design cycle and lower cost, and ensuring a higher overall design efficiency.

[0092] The design process of the sealing device according to a specific embodiment of the present application is as follows:

[0093] As Figure 4 shown, conduct a rain test.

[0094] Determine the test conditions corresponding to the start of water leakage of the historical sealing device in the rain test as the above boundary conditions.

[0095] Obtain the critical contact stress of the above analysis model under the above boundary conditions;

[0096] Determine the stress range that is greater than the above critical contact stress;

[0097] Meanwhile, obtain the actual load parameters, material properties, and the corresponding friction coefficient, and assign them to the above analysis model to obtain the above simulation contact stress;

[0098] Obtain the above first contact stress and the above second contact stress, and determine the above first safety factor and the above second safety factor; when the above seal is installed on the above fitting, the above stress range is greater than the above first safety factor, and when the above seal is used for the above predetermined duration, the above stress range is greater than the above second safety factor;

[0099] Compare whether the above simulation contact stress is within the above stress range. When the above simulation contact stress is within the above stress range, determine that the sealing effect of the above seal is qualified, and determine that the above sealing device is the final sealing device. When the above simulation contact stress is not within the above stress range, determine that the sealing effect is unqualified, and adjust the initial design parameters of the above analysis model so that the sealing effect corresponding to the adjusted above analysis model is qualified, and the above sealing device corresponding to the adjusted above analysis model is the final sealing device.

[0100] In the above embodiments of the present invention, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0101] In the several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the above unit division can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0102] The units described above as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0103] In addition, in each embodiment of the present invention, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0104] If the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above method in each embodiment of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk, or an optical disc that can store program codes.

[0105] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0106] 1) In the design method of the above-mentioned sealing device of the present application, first, an analysis model of the sealing member and the fitting in contact setting is obtained; then, according to the above analysis model, the simulated contact stress and the stress range are determined, wherein the simulated contact stress is the contact stress value at the contact position between the above-mentioned sealing member and the above-mentioned fitting obtained by simulation, and the stress range is the stress range indicating that the sealing effect of the above-mentioned sealing member is qualified; after that, when the above-mentioned simulated contact stress is within the above-mentioned stress range, it is determined that the sealing effect of the above-mentioned sealing member is qualified, and the above-mentioned sealing device is determined as the final sealing device; finally, when the above-mentioned simulated contact stress is not within the above-mentioned stress range, it is determined that the above-mentioned sealing effect is unqualified, and the initial design parameters of the above-mentioned analysis model are adjusted so that the sealing effect corresponding to the adjusted above-mentioned analysis model is qualified, and the above-mentioned sealing device corresponding to the adjusted above-mentioned analysis model is the final sealing device, and the above-mentioned initial design parameters include dimensional data, assembly tolerances, and material properties. Compared with the problem of low design efficiency of the sealing strip in the prior art, the design method of the above-mentioned sealing device of the present application determines the above-mentioned simulated contact stress and the above-mentioned stress range through the analysis model, and then determines whether the sealing effect of the above-mentioned sealing member is qualified by comparing whether the above-mentioned contact stress is within the above-mentioned stress range. And when the above-mentioned simulated contact stress is not within the above-mentioned stress range, by adjusting the initial design parameters of the above-mentioned analysis model, the sealing effect of the adjusted above-mentioned sealing member is qualified, realizing the determination of whether the sealing performance of the sealing member is qualified based on the simulation analysis of the contact stress, ensuring that the sealing performance of the sealing member in the above-mentioned sealing device obtained by the above method is better, avoiding the problem of long design cycle and high cost of the sealing member caused by the need to conduct physical sample processing for entity detection in the prior art, ensuring that the above design cycle is shorter and the cost is lower, and ensuring that the overall design efficiency is higher.

[0107] 2) In the design device of the above-mentioned sealing equipment of the present application, an analysis model of the sealing member and the fitting in contact setting is obtained through the above-mentioned acquisition unit; according to the above-mentioned analysis model, the simulation contact stress and the stress range are determined through the above-mentioned first determination unit, wherein the above-mentioned simulation contact stress is the contact stress value at the contact position between the above-mentioned sealing member and the above-mentioned fitting obtained by simulation, and the above-mentioned stress range is the stress range indicating that the sealing effect of the above-mentioned sealing member is qualified; through the above-mentioned second determination unit, when the above-mentioned simulation contact stress is within the above-mentioned stress range, it is determined that the sealing effect of the above-mentioned sealing member is qualified, and it is determined that the above-mentioned sealing equipment is the final sealing equipment; through the above-mentioned third determination unit, when the above-mentioned simulation contact stress is not within the above-mentioned stress range, it is determined that the above-mentioned sealing effect is unqualified, and the initial design parameters of the above-mentioned analysis model are adjusted so that the sealing effect corresponding to the adjusted above-mentioned analysis model is qualified, and the above-mentioned sealing equipment corresponding to the adjusted above-mentioned analysis model is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerance and material properties. Compared with the problem of low design efficiency of the sealing strip in the prior art, the design device of the above-mentioned sealing equipment of the present application determines the above-mentioned simulation contact stress and the above-mentioned stress range through the analysis model, and then determines whether the sealing effect of the above-mentioned sealing member is qualified by comparing whether the above-mentioned contact stress is within the above-mentioned stress range. And when the above-mentioned simulation contact stress is not within the above-mentioned stress range, by adjusting the initial design parameters of the above-mentioned analysis model, the sealing effect of the adjusted above-mentioned sealing member is qualified, realizing the determination of whether the sealing performance of the sealing member is qualified based on the simulation analysis of the contact stress, ensuring that the sealing performance of the sealing member in the above-mentioned sealing equipment obtained by the above-mentioned device is better, avoiding the problem of long design cycle and high cost of the sealing member caused by the need to conduct physical sample processing for entity detection in the prior art, ensuring that the above-mentioned design cycle is shorter and the cost is lower, and ensuring higher overall design efficiency.

[0108] 3) The above-mentioned rail vehicle of the present application includes a door and a window, and the above-mentioned door and / or the above-mentioned window is designed by using any one of the above-mentioned methods. Compared with the problem of low design efficiency of the sealing strip in the prior art, for the above-mentioned rail vehicle of the present application, the above-mentioned simulation contact stress and the above-mentioned stress range are determined through the analysis model, and then whether the above-mentioned contact stress is within the above-mentioned stress range is compared to determine whether the sealing effect of the above-mentioned seal is qualified. And when the above-mentioned simulation contact stress is not within the above-mentioned stress range, by adjusting the initial design parameters of the above-mentioned analysis model, the sealing effect of the adjusted above-mentioned seal is qualified, realizing the determination of whether the sealing performance of the seal is qualified based on the simulation analysis of the contact stress, ensuring that the seal in the above-mentioned sealing device obtained by the above-mentioned method has a good sealing performance, avoiding the problem in the prior art that physical samples need to be processed for physical detection, resulting in a long design cycle and high cost of the seal, ensuring that the above-mentioned design cycle is shorter and the cost is lower, and ensuring a higher overall design efficiency.

[0109] The foregoing is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A design method for a sealing device, characterized in that, it includes: Obtain an analysis model of the sealing device, where the sealing device includes a seal and a fitting arranged in contact; According to the analysis model, determine the simulated contact stress and the stress range. Among them, the simulated contact stress is the contact stress value at the contact position obtained by simulation, the contact position is the position where the seal contacts the fitting, and the stress range is the stress range indicating that the sealing effect of the seal is qualified; When the simulated contact stress is within the stress range, determine that the sealing effect of the seal is qualified and determine that the sealing device is the final sealing device; When the simulated contact stress is not within the stress range, determine that the sealing effect is unqualified, and adjust the initial design parameters of the analysis model so that the sealing effect corresponding to the adjusted analysis model is qualified. The sealing device corresponding to the adjusted analysis model is the final sealing device. The initial design parameters include dimensional data, assembly tolerances, and material properties. Obtaining an analysis model of the sealing device includes: Obtain the initial design parameters; According to the initial design parameters, establish the target geometric model of the sealing device; Perform finite element analysis on the target geometric model to obtain the analysis model. Performing finite element analysis on the target geometric model to obtain the analysis model includes: When the target geometric model is a three-dimensional model, perform hexahedral element mesh division on the target geometric model to obtain the analysis model; When the target geometric model is a two-dimensional model, perform tetrahedral element mesh division on the target geometric model to obtain the analysis model. According to the analysis model, determining the simulated contact stress includes: Obtain the actual load parameters, material properties, and the corresponding friction coefficient. The actual load parameters are the forces directly applied to the seal during the use of the sealing device. The material properties are the parameters of the equivalent material of the seal during the use of the sealing device. The friction coefficient is the friction coefficient at the contact position; According to the actual load parameters, the material properties, the corresponding friction coefficient, and the analysis model, obtain the simulated contact stress. According to the analysis model, determining the stress range includes: Obtain the boundary conditions, where the boundary conditions are the test conditions corresponding to the start of water leakage of the historical sealing device during the rain test; Obtain the critical contact stress of the analysis model under the boundary conditions. The stress range is the range greater than the critical contact stress.

2. The method according to claim 1, characterized in that, simulating the boundary conditions using the analysis model and calculating the critical contact stress corresponding to the boundary conditions includes: Obtain the critical contact stress of the analysis model under the boundary conditions. Obtain a first contact stress and a second contact stress, where the first contact stress and the second contact stress are preset stress values. The first contact stress is used to characterize the minimum stress value corresponding to when the seal is installed on the fitting, and the second contact stress is used to characterize the minimum stress value corresponding to when the seal has been used for a preset duration. Both the first contact stress and the second contact stress are greater than the critical contact stress; Determine that the ratio of the first contact stress to the critical contact stress is the first safety factor, and the ratio of the second contact stress to the critical contact stress is the second safety factor. The stress range corresponding to when the seal is installed on the fitting is a range greater than the first safety factor, and the stress range corresponding to when the seal has been used for the preset duration is a range greater than the second safety factor.

3. The method according to claim 2, characterized in that, The material properties include a first sub-material property and a second sub-material property. The first sub-material property is the equivalent material parameter when the seal is installed on the fitting, and the second sub-material property is the equivalent material parameter when the seal has been used for the preset duration. According to the actual load parameters, the material properties, the corresponding friction coefficient, and the analysis model, obtain the simulated contact stress, including: According to the actual load parameters, the first sub-material property, the corresponding friction coefficient, and the analysis model, obtain the first contact stress; According to the actual load parameters, the second sub-material property, the corresponding friction coefficient, and the analysis model, obtain the second contact stress; Obtain a first ratio of the first contact stress to the critical contact stress, and a second ratio of the second contact stress to the critical contact stress.

4. A design device for a sealing device, characterized in that, comprises: An acquisition unit for acquiring an analysis model of the sealing device, where the sealing device includes a seal and a fitting in contact; A first determination unit for determining a simulated contact stress and a stress range according to the analysis model, where the simulated contact stress is the contact stress value at the contact position obtained by simulation, the contact position is the position where the seal contacts the fitting, and the stress range is the stress range characterizing that the sealing effect of the seal is qualified; A second determination unit for determining that the sealing effect of the seal is qualified and determining that the sealing device is the final sealing device when the simulated contact stress is within the stress range; A third determination unit for determining that the sealing effect is unqualified and adjusting the initial design parameters of the analysis model when the simulated contact stress is not within the stress range, so that the sealing effect corresponding to the adjusted analysis model is qualified, and the sealing device corresponding to the adjusted analysis model is the final sealing device. The initial design parameters include dimensional data, assembly tolerances, and material properties. The acquisition unit includes: A first acquisition module for acquiring the initial design parameters; A building module, configured to build a target geometric model of the sealing device according to the initial design parameters; An analysis module, configured to perform finite element analysis on the target geometric model to obtain the analysis model, The analysis module includes: A first sub-module for dividing a hexahedral element mesh of the target geometric model to obtain the analysis model when the target geometric model is a three-dimensional model; A second sub-module for dividing a tetrahedral element mesh of the target geometric model to obtain the analysis model when the target geometric model is a two-dimensional model, The first determination unit includes: A second acquisition module, configured to acquire actual load parameters, material properties, and corresponding friction coefficients. The actual load parameters are the forces directly applied to the seal during the use of the sealing device. The material properties are the parameters of the equivalent material of the seal during the use of the sealing device. The friction coefficient is the friction coefficient at the contact position; A processing module, configured to obtain the simulated contact stress according to the actual load parameters, the material properties, the corresponding friction coefficients, and the analysis model, The first determination unit further includes: A third acquisition module, configured to acquire boundary conditions, where the boundary conditions are the test conditions corresponding to the start of water leakage of the historical sealing device during the rain test; A fourth acquisition module, configured to acquire the critical contact stress of the analysis model under the boundary conditions, and the stress range is greater than the range of the critical contact stress.

5. A computer-readable storage medium, Characterized in that The computer-readable storage medium includes a stored program, wherein the program executes the method according to any one of claims 1 to 3.

6. A processor, Characterized in that The processor is configured to run a program, wherein the program executes the method according to any one of claims 1 to 3 when running.

7. A rail vehicle, Characterized in that It includes: Doors and windows, where the doors and / or the windows are designed by using the method according to any one of claims 1 to 3.

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