CN114647963A - Method for designing sealing device, device for designing sealing device, and rail vehicle - Google Patents

Abstract

The application provides a design method of a sealing device, a design device thereof and a rail vehicle, wherein the method comprises the following steps: firstly, acquiring an analysis model of a sealing member and an assembly member which are arranged in a contact mode; then, determining simulation contact stress and a stress range according to the analysis model; then, determining that the sealing effect of the sealing element is qualified and determining that the sealing equipment is final sealing equipment under the condition that the simulated contact stress is within the stress range; and finally, determining that the sealing effect is unqualified under the condition that the simulated contact stress is not in the stress range, and adjusting the initial design parameters of the analysis model to ensure that the corresponding sealing effect of the adjusted analysis model is qualified, wherein the sealing equipment corresponding to the adjusted analysis model is the final sealing equipment. Whether the sealing performance of the sealing element is qualified or not is determined based on contact stress simulation analysis, so that the sealing performance of the sealing element in the obtained sealing equipment is better, the design period is shorter, the cost is lower, and the overall design efficiency is higher.

Description

Design method of sealing equipment, design device thereof, and rail vehicle

technical field

The present application relates to the field of vehicles, and in particular, to a design method of a sealing device, a design device thereof, a computer-readable storage medium, a processor, and a rail vehicle.

Background technique

The sealant strip without sealant is easy to maintain, and is widely used in the doors and windows of rail vehicles and automobiles. The sealing strip requires that it can be easily processed by injection molding, has a certain elasticity, suitable hardness, and small compression permanent deformation, is not easy to decompose and age, and can maintain a good sealing state for a long time. Rubber is an elastic material with remarkable elasticity, which can greatly change its size under the action of external force and undergo great reversible deformation. This property of rubber makes it one of the primary seal construction materials and can be used as a contact seal for virtually any type of seal construction. At present, due to the comprehensive effect of many factors such as existing materials, manufacturing process, use environment, cost, etc., most of the existing sealing strips use EPDM rubber as the main raw material. The reason why the rubber is able to close the gap between the two surfaces being sealed is due to its interaction on a certain actual contact surface. At present, most of the testing methods are used for the detection of its sealing effect and leakage. This method requires the processing of physical samples, which has a long cycle and high cost, which is not conducive to the modification of the scheme and affects the progress of the project.

Therefore, a method for designing a sealing rubber strip is urgently needed to solve the problem of low design efficiency of the sealing rubber strip in the prior art.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the technology described in this article and therefore it may contain certain information that does not form part of the already known in this country to a person of ordinary skill in the art known prior art.

SUMMARY OF THE INVENTION

The main purpose of the present application is to provide a design method of sealing equipment, a design device thereof, a computer-readable storage medium, a processor and a rail vehicle, so as to solve the problem of low design efficiency of sealing rubber strips in the prior art.

According to an aspect of the embodiments of the present invention, a method for designing a sealing device is provided, including: acquiring an analysis model of the sealing device, the sealing device including a contact-disposed seal and an assembly; determining a simulation according to the analysis model Contact stress and stress range, wherein the simulated contact stress is the contact stress value of the contact position obtained by simulation, and the contact position is the position where the seal is in contact with the assembly, and the stress range is the The stress range within which the sealing effect of the seal is qualified; when the simulated contact stress is within the stress range, it is determined that the sealing effect of the seal is qualified, and the sealing device is determined to be the final sealing device; 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 adjusted The sealing device corresponding to the analysis model is the final sealing device, and the initial design parameters include dimensional data, assembly tolerances, and material properties.

Optionally, acquiring an analysis model of the sealing device includes: acquiring the initial design parameters; establishing a target geometric model of the sealing device according to the initial design parameters; performing finite element analysis on the target geometric model to obtain the Describe the analytical model.

Optionally, performing finite element analysis on the target geometric model to obtain the analysis model, comprising: in the case that the target geometric model is a three-dimensional model, performing hexahedral mesh division on the target geometric model to obtain the analysis model; in the case that the target geometric model is a two-dimensional model, the target geometric model is divided into a tetrahedral mesh to obtain the analysis model.

Optionally, determining the simulated contact stress according to the analysis model includes: acquiring actual load parameters, material properties, and corresponding friction coefficients, where the actual load parameters are directly applied to the sealing device during use of the sealing device. the force on the seal, the material property is the parameter of the equivalent material of the seal during the use of the sealing device, the friction coefficient is the friction coefficient of the contact position; according to the actual load parameters, the material properties, the corresponding friction coefficient, and the analysis model to obtain the simulated contact stress.

Optionally, determining the stress range according to the analysis model includes: obtaining boundary conditions, where the boundary conditions are test conditions corresponding to when the historical sealing equipment begins to leak in the rain test; obtaining the analysis under the boundary conditions. The critical contact stress of the model, the stress range is a range greater than the critical contact stress.

Optionally, using the analysis model to simulate the boundary condition, and calculating and obtaining the critical contact stress corresponding to the boundary condition, comprising: obtaining the critical contact stress of the analysis model under the boundary condition; obtaining a first contact stress and second contact stress, the first contact stress and the second contact stress are preset stress values, and the first contact stress is used to represent the corresponding The minimum stress value of , the second contact stress is used to represent the minimum stress value corresponding to the seal after a predetermined period of time, the first contact stress and the second contact stress are both greater than the critical contact stress; determine 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 corresponding stress range is larger than the first safety factor when the accessory is on, and the corresponding stress range after the seal is used for the predetermined period of time is larger than the second safety factor.

Optionally, the material property includes a first sub-material property and a second sub-material property, the first sub-material property is an equivalent material parameter when the seal is installed on the assembly, and the first sub-material property is an equivalent material parameter. The two sub-material properties are the equivalent material parameters of the seal after using the predetermined period of time. According to the actual load parameters, the material properties, the corresponding friction coefficient and the analysis model, the simulated contact is obtained. stress, including: obtaining the first contact stress according to the actual load parameter, the first sub-material property, the corresponding friction coefficient, and the analysis model; according to the actual load parameter, the second sub-material properties, the corresponding friction coefficient, and the analysis model to obtain a second contact stress; obtain a first ratio of the first contact stress to the critical contact stress, and the second contact stress to the critical contact The second ratio of stress.

According to another aspect of the embodiments of the present invention, there is also provided a design device for sealing equipment, the design device for sealing equipment includes an acquisition unit, a first determination unit, a second determination unit, and a third determination unit, wherein the The obtaining unit is used for obtaining an analysis model of the sealing device, and the sealing device includes a sealing member and an assembly part arranged in contact; the first determining unit is used for determining a simulated contact stress and a stress range according to the analysis model, wherein, The simulated contact stress is the contact stress value of the contact position obtained by simulation, the contact position is the position where the seal is in contact with the assembly, and the stress range is the stress characterizing the qualified sealing effect of the seal range; the second determining unit is configured to determine that the sealing effect of the sealing element is qualified under the condition that the simulated contact stress is within the stress range, and determine that the sealing device is the final sealing device; the first The third determination unit 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 adjusted analysis model corresponds to The sealing effect 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.

According to yet another aspect of the embodiments of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium includes a stored program, wherein the program is used to execute any one of the methods.

According to yet another aspect of the embodiments of the present invention, a processor is also provided, and the processor is configured to run a program, wherein any one of the methods is executed when the program is run.

According to yet another aspect of the embodiments of the present invention, a rail vehicle is also provided, the rail vehicle includes a vehicle door and a vehicle window, and the vehicle door and/or the vehicle window are designed by adopting any of the methods described above. .

In the embodiment of the present invention, in the design method of the sealing device, first, the analysis model of the sealing member and the assembly member arranged in contact is obtained; then, according to the analysis model, the simulated contact stress and the stress range are determined, wherein all the The simulated contact stress is the contact stress value obtained by simulation at the contact position between the seal and the assembly, and the stress range is the stress range that characterizes the sealing effect of the seal; after that, in the simulated contact stress In the case of being within the stress range, it is determined that the sealing effect of the seal is qualified, and the sealing device is determined to be the final sealing device; finally, 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 dimensional data, assembly tolerances, and material properties. Compared with the problem that the design efficiency of the sealing strip in the prior art is low, the design method of the sealing device of the present application determines the simulated contact stress and the stress range through an analysis model, and then compares the contact Whether the stress is within the stress range, it is determined whether the sealing effect of the seal is qualified, and if the simulated contact stress is not within the stress range, the initial design parameters of the analysis model are adjusted so that The adjusted sealing effect of the sealing element is qualified, and it is realized whether the sealing performance of the sealing element is qualified based on the simulation analysis of contact stress, and the sealing performance of the sealing element in the sealing device obtained by the method is guaranteed to be good, This avoids the need to process physical samples for physical detection in the prior art, resulting in a long design cycle and high cost of the seal, ensuring that the design cycle is short and the cost is low, and that the overall design efficiency is high.

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application. In the attached image:

1 shows a schematic flowchart of a method for designing a sealing device according to an embodiment of the present application;

FIG. 2 shows a schematic diagram of a contact pressure relationship according to an embodiment of the present application;

3 shows a schematic diagram of a design device of a sealing device according to an embodiment of the present application;

FIG. 4 shows a flowchart of a design apparatus of a sealing apparatus according to an embodiment of the present application.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In order to make those skilled in the art better understand the solutions 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 The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances for the embodiments of the application described herein. Furthermore, 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 is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element can be "directly connected" to the other element or "connected" to the other element through a third element.

As mentioned in the background art, the design efficiency of the sealing tape in the prior art is low. In order to solve the above problem, a typical embodiment of the present application provides a design method of sealing equipment, Design apparatus, computer-readable storage medium, processor, and rail vehicle thereof.

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

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

Step S101, acquiring an analysis model of a sealing device, where the sealing device includes a contact-disposed seal and an assembly;

Step S102, according to the above-mentioned analysis model, determine the simulated contact stress and the stress range, wherein, the above-mentioned simulated contact stress is the contact stress value of the contact position obtained by simulation, the above-mentioned contact position is the position where the above-mentioned seal is in contact with the above-mentioned assembly, and the above-mentioned stress The range is the stress range that characterizes the qualified sealing effect of the above-mentioned seals;

Step S103, when the simulated contact stress is within the stress range, it is determined that the sealing effect of the sealing element is qualified, and the sealing device is determined to be the final sealing device;

Step S104, in the case that the above-mentioned simulated contact stress is not within the above-mentioned stress range, determine that the above-mentioned sealing effect is unqualified, and adjust the initial design parameters of the above-mentioned analysis model, so that the sealing effect corresponding to the above-mentioned adjusted analysis model is qualified, and after adjustment The above-mentioned sealing equipment corresponding to the above-mentioned analysis model is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerances and material properties.

In the design method of the above-mentioned sealing equipment, first, the analytical model of the sealing member and the assembly part that are in contact with the set is obtained; then, according to the above-mentioned analytical model, the simulated contact stress and the stress range are determined, wherein the above-mentioned simulated contact stress is the above-mentioned seal obtained by simulation. The contact stress value of the contact position between the part and the above-mentioned assembly part, the above-mentioned stress range is the stress range indicating that the sealing effect of the above-mentioned seal is qualified; after that, when the above-mentioned simulated contact stress is within the above-mentioned stress range, determine the sealing of the above-mentioned seal. The effect is qualified, and it is determined that the above-mentioned sealing device is 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 not qualified, and the initial design parameters of the above-mentioned analysis model are adjusted so that the adjusted The sealing effect corresponding to the above-mentioned analysis model is qualified, the above-mentioned sealing equipment corresponding to the above-mentioned adjusted analysis model is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerances and material properties. Compared with the problem that the design efficiency of the sealing rubber strip in the prior art is low, 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 by analyzing the model, and then compares whether the above-mentioned contact stress is located in the above-mentioned contact stress. Within the stress range, it is determined whether the sealing effect of the above-mentioned seal is qualified, and in the case that 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, so that the adjusted sealing effect of the above-mentioned seal is achieved. Qualified, it is possible to determine whether the sealing performance of the sealing element is qualified based on the simulation analysis of contact stress, which ensures the sealing performance of the sealing element in the above sealing device obtained by the above method is good, and avoids the need to process physical samples in the prior art. The physical inspection leads to the problem of long design cycle and high cost of the seal, which ensures that the above-mentioned design cycle is short and the cost is low, and the overall design efficiency is high.

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

In a specific embodiment, the above-mentioned dimensional data represents the size of the above-mentioned seal and the size of the above-mentioned assembly in the above-mentioned sealing device, and the above-mentioned assembly tolerance indicates the matching accuracy of the above-mentioned seal and the above-mentioned assembly. The amount of variation in the clearance or interference of the fittings, the above-mentioned material properties represent the characteristic properties of the materials used in the above-mentioned seals and the above-mentioned fittings (that is, the inherent properties of the material itself) and functional properties (that is, under certain conditions and within certain limits. When a certain effect is exerted, the material converts this effect into another form of function).

According to a specific embodiment of the present application, obtaining an analysis model of a sealing device includes: obtaining the above-mentioned initial design parameters; establishing a target geometric model of the above-mentioned sealing device according to the above-mentioned initial design parameters; performing finite element analysis on the above-mentioned target geometric model, The above analysis model is obtained. By establishing the target geometric model of the above-mentioned sealing equipment, and performing finite element analysis on the above-mentioned target geometric model, the simulation optimization of the design of the sealing equipment is further realized, and the low design efficiency of the sealing rubber strip in the prior art is further avoided. The problem further ensures that the design cycle of the above-mentioned sealing device is short and the design cost is low.

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 established in Abaqus (general finite element analysis software) software, Abaqus includes a rich and can simulate arbitrary geometric shapes. Element library, and has a library of various types of material models to simulate the behavior of typical engineering materials.

Specifically, finite element analysis is to use mathematical approximation to simulate the sealed equipment. Using the interaction of the above-mentioned seals and the above-mentioned assembly parts, a finite number of unknowns can be used to approximate the real above-mentioned sealed equipment with infinite unknowns.

According to another specific embodiment of the present application, performing finite element analysis on the above-mentioned target geometric model to obtain the above-mentioned analysis model includes: in the case that the above-mentioned target geometric model is a three-dimensional model, performing a hexahedral element mesh on the above-mentioned target geometric model Division to obtain the above analysis model; in the case that the above target geometric model is a two-dimensional model, the above target geometric model is divided into tetrahedral element meshes to obtain the above analysis model.

In a specific embodiment, the above-mentioned three-dimensional model is meshed by a sweeping method, and hexahedral elements are used for simulation, and the above-mentioned two-dimensional model is simulated by using tetrahedral elements, and mesh refinement is focused on the above-mentioned contact positions, Abaqus software or Hypermesh software is used for the above mesh division. Of course, other software with the same function can also be used to complete the above mesh division.

According to another specific embodiment of the present application, determining the simulated contact stress according to the above analysis model includes: acquiring actual load parameters, material properties and corresponding friction coefficients, where the above actual load parameters are during the use of the above sealing device, The force directly applied to the above-mentioned seal, the above-mentioned material properties are the parameters of the equivalent material of the above-mentioned seal during the use of the above-mentioned sealing equipment, and the above-mentioned friction coefficient is the friction coefficient of the above-mentioned contact position; according to the above-mentioned actual load parameters, the above-mentioned The material properties, the corresponding friction coefficients described above, and the analysis model described above are used to obtain the simulated contact stress described above. In this embodiment, the simulated contact stress is determined according to the obtained actual load parameters, material properties, and the corresponding friction coefficient, so that the simulated contact stress is relatively close to the difference between the seal and the assembly during the actual use of the sealing device. The contact stress between the two ensures that the authenticity of the above-mentioned simulated contact stress is strong, and while further ensuring that the design period of the above-mentioned sealing device is short, it further ensures that the above-mentioned sealing device obtained by the above-mentioned method of the present application has a better sealing effect. it is good.

Specifically, the above-mentioned simulated contact stress is obtained by assigning the above-mentioned actual load parameters, the above-mentioned material properties, and the above-mentioned corresponding friction coefficients to the above-mentioned analysis model.

In a specific embodiment, the above-mentioned friction parameters are obtained by performing a sliding friction test on a grinding plate with the same material as the above-mentioned seal and the above-mentioned fitting.

In order to further ensure that the design period of the above-mentioned sealing equipment is short, according to a specific embodiment of the present application, according to the above-mentioned analysis model, determining the stress range includes: obtaining boundary conditions, and the above-mentioned boundary conditions are that the historical sealing equipment starts in the rain test Corresponding test conditions for water leakage; obtain the critical contact stress of the above analysis model under the above boundary conditions, and the above stress range is a range greater than the above critical contact stress. The above-mentioned critical contact stress is determined by obtaining the above-mentioned test conditions when the historical sealing equipment begins to leak in the rain test, and then the above-mentioned stress range is determined to be greater than the above-mentioned critical contact stress range, which ensures that the above-mentioned stress range can meet the practical application process. The demand for water leakage ensures that the sealing effect of the above-mentioned sealing equipment determined according to the above-mentioned stress range is good, which further avoids the problem of low design efficiency caused by the proofing test of the sealing equipment, and further ensures that the above-mentioned sealing equipment has a short design cycle and lower cost.

The above boundary conditions are obtained by applying a rain test on the car window under the condition that the car body and the interior panel are fixed, and the above seal is assembled with the car body, the above fittings and the car window through interference.

In order to further ensure that the sealing effect of the above-mentioned sealing device is better, 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 boundary conditions The above-mentioned critical contact stress of the above-mentioned analysis model is obtained; the first contact stress and the second contact stress are obtained, the above-mentioned first contact stress and the above-mentioned second contact stress are preset stress values, and the above-mentioned first contact stress is used to characterize the above-mentioned seal. The minimum stress value corresponding to the installation on the above-mentioned assembly, the above-mentioned second contact stress is used to represent the corresponding minimum stress value after the above-mentioned seal is used for a predetermined period of time, the above-mentioned first contact stress and the above-mentioned second contact stress are both greater than the above-mentioned critical contact stress Stress; determine 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, when the seal is installed on the assembly The corresponding stress range is greater than the range of the first safety factor, and the corresponding stress range after the seal is used for the predetermined period of time is greater than the second safety factor. By obtaining the above-mentioned first contact stress and the above-mentioned second contact stress, while the above-mentioned first contact stress and the above-mentioned second contact stress are both 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 according to The above-mentioned first safety factor and the above-mentioned second safety system determine the above-mentioned stress range, that is, the present application, while meeting the water-tightness standard of the sealing equipment, considers the contact stress changes in the initial use of the seal and after a predetermined period of time in actual working conditions. It is ensured that the obtained stress range can meet the requirements of the sealing effect at the initial stage of the installation of the seal and after the predetermined period of time, and further ensures that the sealing effect of the sealing device determined according to the stress range is better.

In a specific embodiment, the above-mentioned first contact stress and the above-mentioned second contact stress are obtained by the above-mentioned method in combination with actual load conditions such as wind pressure, rain pressure, and acceleration of the above-mentioned sealing device.

Specifically, as shown in FIG. 2 , when the above-mentioned seal is installed on the above-mentioned assembly, the corresponding minimum stress value is A; after the above-mentioned seal is used for the above-mentioned predetermined time period t, after stress relaxation occurs and is basically stable, the corresponding contact stress value B The above-mentioned critical contact pressure is C, and the above-mentioned first contact stress A and the above-mentioned second contact stress B are all greater than the critical contact stress standard C, so as to ensure that the sealing performance of the above-mentioned seal is qualified.

According to another specific embodiment of the present application, the material properties include a first sub-material property and a second sub-material property, and the first sub-material property is an equivalent material parameter when the seal is installed on the assembly, The second sub-material property is an equivalent material parameter of the seal after the predetermined time period is used, and the simulated contact stress is obtained according to the actual load parameter, the material property, the corresponding friction coefficient and the analysis model, including: The above-mentioned actual load parameters, the above-mentioned first sub-material properties, the above-mentioned corresponding friction coefficients, and the above-mentioned analysis model, the first contact stress is obtained; according to the above-mentioned actual load parameters, the above-mentioned second sub-material properties, the corresponding above-mentioned friction coefficient and the above-mentioned analysis model , obtain the second contact stress; obtain the first ratio of the first contact stress to the critical contact stress, and the second ratio of the second contact stress to the critical contact stress. According to the two conditions of the initial stage when the above-mentioned seal is installed on the above-mentioned fitting and the latter stage of using the above-mentioned predetermined period of time, the above-mentioned material properties are determined to be the above-mentioned first sub-material properties and the above-mentioned second sub-material properties, and according to the two different above-mentioned materials The attribute determines the simulation contact pressure, which ensures that the first contact stress and the second contact stress are closer to the actual use of the sealing device, and further ensures the simulation authenticity and accuracy of the contact stress.

Of course, in the actual application process, it is not limited to the above-mentioned first sub-material properties and the above-mentioned second sub-material properties. In order to have higher simulation accuracy and higher quality, those skilled in the art can also set various sub-material properties.

In a specific embodiment, the properties of the above-mentioned first sub-material are obtained by using hyperelastic constitutive parameters, which are obtained by fitting the test data of uniaxial tension, biaxial tension, plane shear and volume compression, and the above-mentioned second sub-material is obtained by fitting. The properties use the above hyperelastic constitutive parameters and viscoelastic constitutive parameters, wherein the above viscoelastic constitutive parameters are obtained by fitting the stress relaxation test data.

The embodiment of the present application also provides a design device for sealing equipment. It should be noted that the design device for sealing equipment in the embodiment of the present application can be used to execute the design method for sealing equipment provided in the embodiment of the present application. The following describes the design device of the sealing device provided by the embodiment of the present application.

FIG. 3 is a schematic diagram of a design device of a sealing device according to an embodiment of the present application. As shown in FIG. 3 , the apparatus includes an acquisition unit 10 , a first determination unit 20 , a second determination unit 30 and a third determination unit 40 , wherein the acquisition unit 10 is used to acquire an analysis model of a sealing device, and the sealing device includes The sealing member and the assembly part provided in contact; the above-mentioned first determination unit 20 is used to determine the simulated contact stress and the stress range according to the above-mentioned analysis model, wherein, the above-mentioned simulated contact stress is the contact stress value of the contact position obtained by simulation, and the above-mentioned contact position is the position where the seal is in contact with the fitting, and the stress range is a stress range characterizing that the sealing effect of the seal is qualified; the second determining unit 30 is configured to, when the simulated contact stress is within the stress range, Determine that the sealing effect of the above-mentioned sealing element is qualified, and determine that the above-mentioned sealing device is the final sealing device; Adjust the initial design parameters of the above-mentioned analysis model, so that the sealing effect corresponding to the above-mentioned adjusted analysis model is qualified, and the above-mentioned sealing equipment corresponding to the above-mentioned adjusted analysis model is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerances and materials. performance.

In the above-mentioned design device for sealing equipment, the above-mentioned acquisition unit is used to acquire the analytical model of the sealing member and the assembling member provided in contact; the above-mentioned first determination unit determines the simulated contact stress and the stress range according to the above-mentioned analysis model, wherein the above-mentioned simulated contact stress In order to obtain the contact stress value of the contact position between the above-mentioned seal and the above-mentioned assembly part by simulation, the above-mentioned stress range is a stress range that characterizes the qualified sealing effect of the above-mentioned seal; through the above-mentioned second determination unit, the above-mentioned simulated contact stress is located in the above-mentioned stress range. In the case of the above-mentioned sealing element, it is determined that the sealing effect of the above-mentioned seal is qualified, and the above-mentioned sealing device is determined to be the final sealing device; when the above-mentioned simulated contact stress is not within the above-mentioned stress range, the above-mentioned sealing effect is determined to be unqualified by the above-mentioned third determining unit. , and adjust the initial design parameters of the above-mentioned analysis model, so that the sealing effect corresponding to the above-mentioned analysis model after adjustment is qualified, and the above-mentioned sealing equipment corresponding to the above-mentioned analysis model after adjustment is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerances and material properties. Compared with the problem that the design efficiency of the sealing rubber strip in the prior art is low, the design device of the above-mentioned sealing equipment of the present application determines the above-mentioned simulated contact stress and the above-mentioned stress range through an analysis model, and then compares whether the above-mentioned contact stress is located in the above-mentioned contact stress. Within the stress range, it is determined whether the sealing effect of the above-mentioned seal is qualified, and in the case that 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, so that the adjusted sealing effect of the above-mentioned seal is achieved. Qualified, it is possible to determine whether the sealing performance of the sealing element is qualified based on the simulation analysis of contact stress, which ensures that the sealing performance of the sealing element in the above-mentioned sealing device obtained by the above-mentioned device is good, and avoids the need to process physical samples in the prior art. The physical inspection leads to the problem of long design cycle and high cost of the seal, which ensures that the above-mentioned design cycle is short and the cost is low, and the overall design efficiency is high.

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

In a specific embodiment, the above-mentioned dimensional data represents the size of the above-mentioned seal and the size of the above-mentioned assembly in the above-mentioned sealing device, and the above-mentioned assembly tolerance indicates the matching accuracy of the above-mentioned seal and the above-mentioned assembly. The amount of variation in the clearance or interference of the fittings, the above-mentioned material properties represent the characteristic properties of the materials used in the above-mentioned seals and the above-mentioned fittings (that is, the inherent properties of the material itself) and functional properties (that is, under certain conditions and within certain limits. When a certain effect is exerted, the material converts this effect into another form of function).

According to a specific embodiment of the present application, the acquisition unit includes a first acquisition module, an establishment module, and an analysis module, wherein the first acquisition module is used to acquire the initial design parameters; the establishment module is used to obtain the initial design parameters according to the initial design parameters , to establish the target geometric model of the above-mentioned sealing device; 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 establishing the target geometric model of the above-mentioned sealing equipment, and performing finite element analysis on the above-mentioned target geometric model, the simulation optimization of the design of the sealing equipment is further realized, and the low design efficiency of the sealing rubber strip in the prior art is further avoided. The problem further ensures that the design cycle of the above-mentioned sealing device is short and the design cost is low.

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 established in Abaqus (general finite element analysis software) software, Abaqus includes a rich and can simulate arbitrary geometric shapes. Element library, and has a library of various types of material models to simulate the behavior of typical engineering materials.

Specifically, finite element analysis is to use mathematical approximation to simulate the sealed equipment. Using the interaction of the above-mentioned seals and the above-mentioned assembly parts, a finite number of unknowns can be used to approximate the real above-mentioned sealed equipment with infinite unknowns.

According to another specific embodiment of the present application, the above-mentioned analysis module includes a first division sub-module and a second division sub-module, wherein the above-mentioned first division sub-module is used for analyzing the target geometric model in a three-dimensional model. The above-mentioned target geometric model is meshed with hexahedral elements to obtain the above-mentioned analysis model; the above-mentioned second division sub-module is used to perform tetrahedral element mesh division on the above-mentioned target geometric model when the above-mentioned target geometric model is a two-dimensional model, The above analysis model is obtained.

In a specific embodiment, the above-mentioned three-dimensional model is meshed by a sweeping method, and hexahedral elements are used for simulation, and the above-mentioned two-dimensional model is simulated by using tetrahedral elements, and mesh refinement is focused on the above-mentioned contact positions, Abaqus software or Hypermesh software is used for the above mesh division. Of course, other software with the same function can also be used to complete the above mesh division.

According to another specific embodiment of the present application, the first determination unit includes a second acquisition module and a processing module, wherein the second acquisition module is used to acquire actual load parameters, material properties and corresponding friction coefficients. The actual load The parameter is the force directly exerted on the above-mentioned seal during the use of the above-mentioned sealing device, the above-mentioned material property is the parameter of the equivalent material of the above-mentioned seal during the use of the above-mentioned sealing device, and the above-mentioned friction coefficient is the above-mentioned contact position. The above-mentioned processing module is configured to obtain the above-mentioned simulated contact stress according to the above-mentioned actual load parameters, the above-mentioned material properties, the above-mentioned corresponding friction coefficient and the above-mentioned analysis model. In this embodiment, the simulated contact stress is determined according to the obtained actual load parameters, material properties, and the corresponding friction coefficient, so that the simulated contact stress is relatively close to the difference between the seal and the assembly during the actual use of the sealing device. The contact stress between the two ensures that the authenticity of the above-mentioned simulated contact stress is strong, and while further ensuring that the design cycle of the above-mentioned sealing equipment is short, it further ensures that the sealing effect of the above-mentioned sealing equipment obtained through the above-mentioned device of the present application is relatively high. it is good.

Specifically, the above-mentioned simulated contact stress is obtained by assigning the above-mentioned actual load parameters, the above-mentioned material properties, and the above-mentioned corresponding friction coefficients to the above-mentioned analysis model.

In a specific embodiment, the above-mentioned friction parameters are obtained by performing a sliding friction test on a grinding plate with the same material as the above-mentioned seal and the above-mentioned fitting.

In order to further ensure that the design period of the above-mentioned sealing device is short, according to a specific embodiment of the present application, the above-mentioned first determination unit further includes a third acquisition module and a fourth acquisition module, wherein the above-mentioned third acquisition module is used to acquire the boundary Conditions, the above boundary conditions are the test conditions corresponding to when the historical sealing equipment begins to leak in the rain test; the above fourth acquisition module is used to obtain the critical contact stress of the above analysis model under the above boundary conditions, and the above stress range is greater than the above critical contact stress range of stress. The above-mentioned critical contact stress is determined by obtaining the above-mentioned test conditions when the historical sealing equipment begins to leak in the rain test, and then the above-mentioned stress range is determined to be greater than the above-mentioned critical contact stress range, which ensures that the above-mentioned stress range can meet the practical application process. The demand for water leakage ensures that the sealing effect of the above-mentioned sealing equipment determined according to the above-mentioned stress range is good, which further avoids the problem of low design efficiency caused by the proofing test of the sealing equipment, and further ensures that the above-mentioned sealing equipment has a short design cycle and lower cost.

The above boundary conditions are obtained by applying a rain test on the car window under the condition that the car body and the interior panel are fixed, and the above seal is assembled with the car body, the above fittings and the car window through interference.

In order 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, wherein the above-mentioned first acquisition sub-module The acquisition sub-module is used to acquire the critical contact stress of the analysis model under the above-mentioned boundary conditions; the second acquisition sub-module is used to acquire the first contact stress and the second contact stress, and the first contact stress and the second contact stress are: The preset stress value, the first contact stress is used to represent the minimum stress value corresponding to the seal when the seal is installed on the assembly, and the second contact stress is used to represent the minimum stress value corresponding to the seal after being used for a predetermined period of time , the above-mentioned first contact stress and the above-mentioned second contact stress are both greater than the above-mentioned critical contact stress; the above-mentioned determination sub-module is used to determine the ratio of the above-mentioned first contact stress to the above-mentioned critical contact stress as the first safety factor, and the above-mentioned second contact stress and The ratio of the critical contact stress is the second safety factor, the corresponding stress range when the seal is installed on the assembly is greater than the range of the first safety factor, and the corresponding stress after the seal is used for the predetermined period of time. The stress range is a range larger than the above-mentioned second safety factor. By obtaining the above-mentioned first contact stress and the above-mentioned second contact stress, while the above-mentioned first contact stress and the above-mentioned second contact stress are both 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 according to The above-mentioned first safety factor and the above-mentioned second safety system determine the above-mentioned stress range, that is, the present application, while meeting the water-tightness standard of the sealing equipment, considers the contact stress changes in the initial use of the seal and after a predetermined period of time in actual working conditions. It is ensured that the obtained stress range can meet the requirements of the sealing effect at the initial stage of the installation of the seal and after the predetermined period of time, and further ensures that the sealing effect of the sealing device determined according to the stress range is better.

In a specific embodiment, the above-mentioned first contact stress and the above-mentioned second contact stress are obtained by the above-mentioned device in combination with actual load conditions such as wind pressure, rain pressure, and acceleration of the above-mentioned sealing equipment.

Specifically, as shown in FIG. 2 , when the above-mentioned seal is installed on the above-mentioned assembly, the corresponding minimum stress value is A; after the above-mentioned seal is used for the above-mentioned predetermined time period t, after stress relaxation occurs and is basically stable, the corresponding contact stress value B The above-mentioned critical contact pressure is C, and the above-mentioned first contact stress A and the above-mentioned second contact stress B are all greater than the critical contact stress standard C, so as to ensure that the sealing performance of the above-mentioned seal is qualified.

According to another specific embodiment of the present application, the material properties include a first sub-material property and a second sub-material property, and the first sub-material property is an equivalent material parameter when the seal is installed on the assembly, The above-mentioned second sub-material property is an equivalent material parameter of the above-mentioned seal after using the above-mentioned predetermined time period, the above-mentioned processing module includes a first processing sub-module, a second processing sub-module and a third obtaining sub-module, wherein the above-mentioned first processing sub-module. The module is used to obtain the first contact stress according to the above-mentioned actual load parameters, the above-mentioned first sub-material properties, the above-mentioned corresponding friction coefficients and the above-mentioned analysis model; the above-mentioned second processing sub-module is used to obtain the first contact stress according to the above-mentioned actual load parameters, the above-mentioned second sub-modules. The material properties, the corresponding friction coefficient and the analysis model, to obtain the second contact stress; the third acquisition sub-module is used to obtain the first ratio of the first contact stress and the critical contact stress, and the second contact stress and The second ratio of the above-mentioned critical contact stress. According to the two conditions of the initial stage when the above-mentioned seal is installed on the above-mentioned fitting and the latter stage of using the above-mentioned predetermined period of time, the above-mentioned material properties are determined to be the above-mentioned first sub-material properties and the above-mentioned second sub-material properties, and according to the two different above-mentioned materials The attribute determines the simulation contact pressure, which ensures that the first contact stress and the second contact stress are closer to the actual use of the sealing device, and further ensures the simulation authenticity and accuracy of the contact stress.

Of course, in the actual application process, it is not limited to the above-mentioned first sub-material properties and the above-mentioned second sub-material properties. In order to have higher simulation accuracy and higher quality, those skilled in the art can also set various sub-material properties.

In a specific embodiment, the properties of the above-mentioned first sub-material are obtained by using hyperelastic constitutive parameters, which are obtained by fitting the test data of uniaxial tension, biaxial tension, plane shear and volume compression, and the above-mentioned second sub-material is obtained by fitting. The properties use the above hyperelastic constitutive parameters and viscoelastic constitutive parameters, wherein the above viscoelastic constitutive parameters are obtained by fitting the stress relaxation test data.

The design device of the above-mentioned sealing equipment includes a processor and a memory, and the above-mentioned acquisition unit, the above-mentioned first determination unit, the above-mentioned second determination unit, and the above-mentioned third determination unit are all stored as program units in the memory, and executed by the processor and stored in the memory. The above program unit in the above program unit to realize the corresponding function.

The processor includes a kernel, and the kernel calls the corresponding program unit from the memory. One or more cores can be set, and the problem of low design efficiency of the sealing rubber strip in the prior art can be solved by adjusting the parameters of the core.

Memory may include non-persistent memory in computer readable media, random access memory (RAM) and/or non-volatile memory, such as read only memory (ROM) or flash memory (flash RAM), the memory including at least one memory chip.

An embodiment of the present invention provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the above-mentioned method for designing a sealing device is implemented.

An embodiment of the present invention provides a processor, and the processor is used for running a program, wherein the method for designing the sealing device is executed when the program is running.

An embodiment of the present invention provides a device. The device includes a processor, a memory, and a program stored in the memory and running on the processor. The processor implements at least the following steps when executing the program:

Step S101, acquiring an analysis model of a sealing device, where the sealing device includes a contact-disposed seal and an assembly;

Step S102, according to the above-mentioned analysis model, determine the simulated contact stress and the stress range, wherein, the above-mentioned simulated contact stress is the contact stress value of the contact position obtained by simulation, the above-mentioned contact position is the position where the above-mentioned seal is in contact with the above-mentioned assembly, and the above-mentioned stress The range is the stress range that characterizes the qualified sealing effect of the above-mentioned seals;

Step S103, when the simulated contact stress is within the stress range, it is determined that the sealing effect of the sealing element is qualified, and the sealing device is determined to be the final sealing device;

Step S104, in the case that the above-mentioned simulated contact stress is not within the above-mentioned stress range, determine that the above-mentioned sealing effect is unqualified, and adjust the initial design parameters of the above-mentioned analysis model, so that the sealing effect corresponding to the above-mentioned adjusted analysis model is qualified, and after adjustment The above-mentioned sealing equipment corresponding to the above-mentioned analysis model is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerances and material properties.

The devices in this article can be servers, PCs, PADs, mobile phones, and so on.

The present application also provides a computer program product that, when executed on a data processing device, is adapted to execute a program initialized with at least the following method steps:

Step S101, acquiring an analysis model of a sealing device, where the sealing device includes a contact-disposed seal and an assembly;

Step S102, according to the above-mentioned analysis model, determine the simulated contact stress and the stress range, wherein, the above-mentioned simulated contact stress is the contact stress value of the contact position obtained by simulation, the above-mentioned contact position is the position where the above-mentioned seal is in contact with the above-mentioned assembly, and the above-mentioned stress The range is the stress range that characterizes the qualified sealing effect of the above-mentioned seals;

Step S103, when the simulated contact stress is within the stress range, it is determined that the sealing effect of the sealing element is qualified, and the sealing device is determined to be the final sealing device;

Step S104, in the case that the above-mentioned simulated contact stress is not within the above-mentioned stress range, determine that the above-mentioned sealing effect is unqualified, and adjust the initial design parameters of the above-mentioned analysis model, so that the sealing effect corresponding to the above-mentioned adjusted analysis model is qualified, and after adjustment The above-mentioned sealing equipment corresponding to the above-mentioned analysis model is the final sealing equipment, and the above-mentioned initial design parameters include dimensional data, assembly tolerances and material properties.

According to another typical embodiment of the present application, a rail vehicle is further provided, wherein the rail vehicle includes a vehicle door and a vehicle window, and the vehicle door and/or the vehicle window are designed and obtained using any of the above methods.

The aforementioned rail vehicle includes a vehicle door and a vehicle window, and the aforementioned vehicle door and/or the aforementioned vehicle window are designed and obtained by adopting any one of the aforementioned methods. Compared with the problem that the design efficiency of the sealing strip in the prior art is low, the above-mentioned rail vehicle of the present application determines the above-mentioned simulated contact stress and the above-mentioned stress range through an analysis model, and then compares whether the above-mentioned contact stress is within the above-mentioned stress range. , determine whether the sealing effect of the above-mentioned seal is qualified, and in the case that 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, so that the adjusted sealing effect of the above-mentioned seal is qualified, to achieve In order to determine whether the sealing performance of the sealing element is qualified based on the simulation analysis of contact stress, the sealing performance of the sealing element in the above-mentioned sealing device obtained by the above method is guaranteed to be good, and the need for physical detection by processing physical samples in the prior art is avoided. This leads to the problem of long design cycle and high cost of the seal, which ensures that the above-mentioned design cycle is short and the cost is low, and the overall design efficiency is high.

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

As shown in Figure 4, carry out the rain test;

Determine the corresponding test conditions when the historical sealing equipment begins to leak in the rain test as the above boundary conditions;

Obtain the critical contact stress of the above analytical model under the above boundary conditions;

Determine the stress range to be greater than the range of the above critical contact stress;

At the same time, the actual load parameters, material properties and corresponding friction coefficients are obtained, and assigned to the above analysis model to obtain the above simulated contact stress;

Obtain the first contact stress and the second contact stress, and determine the first safety factor and the second safety factor; when the seal is installed on the assembly, the corresponding stress range is greater than the first safety factor. range, the corresponding stress range after the seal is used for the predetermined period of time is greater than the range of the second safety factor;

Compare whether the above-mentioned simulated contact stress is within the above-mentioned stress range, and 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 seal is qualified, and the above-mentioned sealing device is determined to be the final sealing device. If it 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 above-mentioned adjusted analysis model is qualified, and the above-mentioned sealing effect corresponding to the above-mentioned adjusted analysis model is qualified. The equipment is the final sealing equipment.

In the above-mentioned embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content may be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the above-mentioned units may be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of units or modules, and may be in electrical or other forms.

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the above-mentioned integrated units are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially 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, and the computer software product is stored in a storage medium , which includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above-mentioned methods of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes .

From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

1), in the design method of the above-mentioned sealing equipment of the present application, first, obtain the analytical model of the sealing member and the assembly part that contact is provided; Then, according to the above-mentioned analytical model, determine the simulated contact stress and the stress range, wherein, the above-mentioned simulated contact stress In order to obtain the contact stress value of the contact position between the above-mentioned seal and the above-mentioned assembly, the above-mentioned stress range is a stress range that characterizes the qualified sealing effect of the above-mentioned seal; 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 seal is qualified, and the above-mentioned sealing device is determined to be the final sealing device; finally, in the case where the above-mentioned simulated contact stress is not within the above-mentioned stress range, it is determined that the above-mentioned sealing effect is not qualified, and the initial value of the above-mentioned analysis model is adjusted. Design parameters so that the sealing effect corresponding to the adjusted analysis model is qualified, the sealing equipment corresponding to the adjusted analysis model is the final sealing equipment, and the initial design parameters include dimensional data, assembly tolerances and material properties. Compared with the problem that the design efficiency of the sealing rubber strip in the prior art is low, 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 by analyzing the model, and then compares whether the above-mentioned contact stress is located in the above-mentioned contact stress. Within the stress range, it is determined whether the sealing effect of the above-mentioned seal is qualified, and in the case that 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, so that the adjusted sealing effect of the above-mentioned seal is achieved. Qualified, it is possible to determine whether the sealing performance of the sealing element is qualified based on the simulation analysis of contact stress, which ensures the sealing performance of the sealing element in the above sealing device obtained by the above method is good, and avoids the need to process physical samples in the prior art. The physical inspection leads to the problem of long design cycle and high cost of the seal, which ensures that the above-mentioned design cycle is short and the cost is low, and the overall design efficiency is high.

2), in the design device of the above-mentioned sealing equipment of the present application, the analytical model of the sealing member and the assembly part that is in contact is obtained by the above-mentioned acquisition unit; The simulation contact stress and the stress range are determined by the above-mentioned first determination unit according to the above-mentioned analytical model, Wherein, the above-mentioned simulated contact stress is the contact stress value obtained by simulation at the contact position between the above-mentioned seal and the above-mentioned assembly, and the above-mentioned stress range is a stress range indicating that the sealing effect of the above-mentioned seal is qualified; When the 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 to be the final sealing device; when the above-mentioned simulated contact stress is not within the above-mentioned stress range by the above-mentioned third determination unit, Determine that the above-mentioned sealing effect is unqualified, and adjust the initial design parameters of the above-mentioned analysis model, so that the sealing effect corresponding to the above-mentioned adjusted analysis model is qualified, and the above-mentioned sealing equipment corresponding to the above-mentioned adjusted analysis model is the final sealing equipment, and the above-mentioned initial design parameters Includes dimensional data, assembly tolerances, and material properties. Compared with the problem that the design efficiency of the sealing rubber strip in the prior art is relatively low, the design device of the above-mentioned sealing equipment of the present application determines the above-mentioned simulated contact stress and the above-mentioned stress range by analyzing the model, and then compares whether the above-mentioned contact stress is located in the above-mentioned contact stress. Within the stress range, it is determined whether the sealing effect of the above-mentioned seal is qualified, and in the case that 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, so that the adjusted sealing effect of the above-mentioned seal is made. Qualified, it is possible to determine whether the sealing performance of the sealing element is qualified based on the simulation analysis of contact stress, which ensures that the sealing performance of the sealing element in the above-mentioned sealing device obtained by the above-mentioned device is good, and avoids the need to process physical samples in the prior art. The physical inspection leads to the problem of long design cycle and high cost of the seal, which ensures that the above-mentioned design cycle is short and the cost is low, and the overall design efficiency is high.

3) The above-mentioned rail vehicle of the present application includes a vehicle door and a vehicle window, and the vehicle door and/or the vehicle window are designed and obtained by adopting any of the above-mentioned methods. Compared with the problem that the design efficiency of the sealing strip in the prior art is low, the above-mentioned rail vehicle of the present application determines the above-mentioned simulated contact stress and the above-mentioned stress range through an analysis model, and then compares whether the above-mentioned contact stress is within the above-mentioned stress range. , determine whether the sealing effect of the above-mentioned seal is qualified, and in the case that 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, so that the adjusted sealing effect of the above-mentioned seal is qualified, to achieve In order to determine whether the sealing performance of the sealing element is qualified based on the simulation analysis of contact stress, the sealing performance of the sealing element in the above-mentioned sealing device obtained by the above method is guaranteed to be good, and the need for physical detection by processing physical samples in the prior art is avoided. This leads to the problem of long design cycle and high cost of the seal, which ensures that the above-mentioned design cycle is short and the cost is low, and the overall design efficiency is high.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (11)

1. A method of designing a seal apparatus, comprising:

obtaining an analytical model of a sealing apparatus, the sealing apparatus comprising a seal and an assembly disposed in contact;

determining simulated contact stress and a stress range according to the analysis model, wherein the simulated contact stress is a contact stress value of a contact position obtained by simulation, the contact position is a position where the sealing element is in contact with the assembly element, and the stress range is a stress range which is qualified for representing the sealing effect of the sealing element;

determining that the sealing effect of the sealing element is qualified and determining that the sealing equipment is final sealing equipment under the condition that the simulated contact stress is within the stress range;

and under the condition that the simulated contact stress is not in the stress range, determining that the sealing effect is unqualified, and adjusting initial design parameters of the analysis model to ensure that the sealing effect corresponding to the adjusted analysis model is qualified, wherein the sealing equipment corresponding to the adjusted analysis model is final sealing equipment, and the initial design parameters comprise size data, assembly tolerance and material performance.

2. The method of claim 1, wherein obtaining an analytical model of the sealing apparatus comprises:

acquiring the initial design parameters;

establishing a target geometric model of the sealing equipment according to the initial design parameters;

and carrying out finite element analysis on the target geometric model to obtain the analysis model.

3. The method of claim 2, wherein performing a finite element analysis on the target geometric model to obtain the analytical model comprises:

under the condition that the target geometric model is a three-dimensional model, carrying out hexahedral unit meshing on the target geometric model to obtain the analysis model;

and under the condition that the target geometric model is a two-dimensional model, carrying out tetrahedral unit meshing on the target geometric model to obtain the analysis model.

4. The method of claim 1, wherein determining a simulated contact stress from the analytical model comprises:

acquiring an actual load parameter, a material attribute and a corresponding friction coefficient, wherein the actual load parameter is a force directly exerted on the sealing element in the use process of the sealing device, the material attribute is a parameter of an equivalent material of the sealing element in the use process of the sealing device, and the friction coefficient is a friction coefficient of the contact position;

and obtaining the simulated contact stress according to the actual load parameter, the material attribute, the corresponding friction coefficient and the analysis model.

5. The method of claim 4, wherein determining a stress range from the analytical model comprises:

acquiring boundary conditions, wherein the boundary conditions are corresponding test conditions when the historical sealing equipment starts to leak water in a rain test;

and acquiring the critical contact stress of the analysis model under the boundary condition, wherein the stress range is a range larger than the critical contact stress.

6. The method of claim 5, wherein simulating the boundary condition using the analytical model and calculating a critical contact stress corresponding to the boundary condition comprises:

obtaining the critical contact stress of the analysis model under the boundary condition;

acquiring a first contact stress and a second contact stress, wherein the first contact stress and the second contact stress are preset stress values, the first contact stress is used for representing a corresponding minimum stress value when the sealing element is installed on the assembly part, the second contact stress is used for representing a corresponding minimum stress value after the sealing element is used for a preset time period, and both the first contact stress and the second contact stress are greater than the critical contact stress;

determining that the ratio of the first contact stress to the critical contact stress is a first safety factor, determining that the ratio of the second contact stress to the critical contact stress is a second safety factor, wherein the stress range corresponding to the sealing element when the sealing element is installed on the assembly part is a range larger than the first safety factor, and the stress range corresponding to the sealing element after the sealing element is used for the preset time is a range larger than the second safety factor.

7. The method of claim 6, wherein the material properties comprise a first sub-material property that is an equivalent material parameter when the seal is installed on the fitting and a second sub-material property that is an equivalent material parameter after the seal has been in use for the predetermined length of time,

obtaining the simulated contact stress according to the actual load parameter, the material property, the corresponding friction coefficient and the analysis model, wherein the steps of:

obtaining a first contact stress according to the actual load parameter, the first sub-material attribute, the corresponding friction coefficient and the analysis model;

obtaining a second contact stress according to the actual load parameter, the second sub-material attribute, the corresponding friction coefficient and the analysis model;

and acquiring 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.

8. A seal design apparatus, comprising:

an acquisition unit for acquiring an analytical model of a sealing apparatus comprising a seal and a fitting arranged in contact;

the first determining unit is used for determining simulated contact stress and a stress range according to the analysis model, wherein the simulated contact stress is a contact stress value of a contact position obtained through simulation, the contact position is a position where the sealing element is in contact with the assembly part, and the stress range is a stress range which represents that the sealing effect of the sealing element is qualified;

the second determining unit is used for determining that the sealing effect of the sealing element is qualified and determining that the sealing equipment is final sealing equipment under the condition that the simulated contact stress is within the stress range;

and a third determining unit, configured to determine that the sealing effect is not acceptable when the simulated contact stress is not within the stress range, and adjust initial design parameters of the analysis model so that the sealing effect corresponding to the adjusted analysis model is acceptable, where the sealing device corresponding to the adjusted analysis model is a final sealing device, and the initial design parameters include size data, assembly tolerance, and material performance.

9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 7.

10. A processor, characterized in that the processor is configured to run a program, wherein the program when running performs the method of any of claims 1 to 7.

11. A rail vehicle, comprising:

a vehicle door and a vehicle window, the vehicle door and/or the vehicle window being designed using the method of any one of claims 1 to 7.

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