CN114647963A

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

Info

Publication number: CN114647963A
Application number: CN202210302076.4A
Authority: CN
Inventors: 徐涛; 朱红茜; 崔志国; 袁琦; 刘玉文
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-06-21

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

Method for designing sealing device, device for designing sealing device, and rail vehicle

Technical Field

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

Background

The sealing rubber strip without the sealant is convenient to maintain and widely applied to structures such as doors and windows of rail vehicles and automobiles. The sealing rubber strip is required to be conveniently subjected to injection molding processing, has certain elasticity, proper hardness and small compression permanent deformation, is not easy to decompose and age, and can keep a good sealing state for a long time. The rubber is an elastic material with remarkable elasticity, and can greatly change the size of the rubber under the action of external force to generate great reversible deformation. This property of rubber makes it one of the primary seal structure materials and can be used as a contact seal for virtually any seal structure. At present, due to the comprehensive effect of a plurality of factors such as the existing materials, manufacturing processes, use environments, cost and the like, the existing sealing rubber strips mostly adopt ethylene propylene diene monomer as a main raw material. The rubber is able to close the gap between the two surfaces being sealed as a result of its interaction at certain physical contact surfaces. At present, test detection methods are mostly adopted for detecting the sealing effect and the leakage condition of the sealing device, physical samples need to be processed by the method, the period is long, the cost is high, the scheme is not favorably modified, and the project schedule is influenced.

Therefore, a design method of a joint strip is needed to solve the problem of low design efficiency of the joint 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 herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

Disclosure of Invention

The present application mainly aims to provide a method for designing a sealing device, a device for designing the same, a computer-readable storage medium, a processor, and a rail vehicle, so as to solve the problem of low efficiency in designing a sealing rubber strip in the prior art.

According to an aspect of an embodiment of the present invention, there is provided a method of designing a sealing apparatus, including: 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.

Optionally, obtaining an analytical model of the sealing device 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.

Optionally, performing finite element analysis on the target geometric model to obtain the analysis model, including: 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.

Optionally, determining a simulated contact stress according to the analysis 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 property, the corresponding friction coefficient and the analysis model.

Optionally, determining a stress range according to the analysis model includes: 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.

Optionally, simulating the boundary condition by using the analysis model, and calculating to obtain a critical contact stress corresponding to the boundary condition, including: 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, 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 period is a range larger than the second safety factor.

Optionally, the obtaining the simulated contact stress according to the actual load parameter, the material property, the corresponding friction coefficient, and the analysis model includes: 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.

According to another aspect of the embodiments of the present invention, there is also provided a design apparatus of a sealing device, the design apparatus of the sealing device including an obtaining unit, a first determining unit, a second determining unit, and a third determining unit, wherein the obtaining unit is configured to obtain an analysis model of the sealing device, and the sealing device includes a sealing member and a fitting member that are 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; the third determining unit is configured to determine that the sealing effect is not qualified 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 qualified, 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.

According to yet another aspect of embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program is for executing any one of the methods.

According to yet another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, where the program executes to perform any one of the methods.

According to a further aspect of the embodiment of the invention, the rail vehicle comprises a vehicle door and a vehicle window, wherein the vehicle door and/or the vehicle window are designed by adopting any one of the methods.

In the embodiment of the invention, in the design method of the sealing device, firstly, an analysis model of a sealing element and an assembly part which are arranged in a contact mode is obtained; then, according to the analysis model, determining simulated contact stress and a stress range, wherein the simulated contact stress is a contact stress value of a contact position of the sealing element and the assembly element obtained through simulation, and the stress range is a stress range which represents that the sealing effect of the sealing element is qualified; 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, 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. Compared with the problem that the design efficiency of the sealing rubber strip is low in the prior art, the design method of the sealing equipment determines the simulated contact stress and the stress range through the analysis model, determines whether the sealing effect of the sealing element is qualified or not by comparing whether the contact stress is in the stress range, and enables the adjusted sealing effect of the sealing element to be qualified or not by adjusting the initial design parameters of the analysis model under the condition that the simulated contact stress is not in the stress range, thereby realizing the purpose that whether the sealing property of the sealing element is qualified or not based on the contact stress simulation analysis, ensuring the sealing property of the sealing element in the sealing equipment obtained by the method to be good, and avoiding the problem that the design cycle of the sealing element is long and the cost is high because the physical detection is required by processing a physical sample in the prior art, the design period is ensured to be shorter, the cost is lower, and the overall design efficiency is ensured to be higher.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 shows a schematic flow diagram of a method of designing a sealing apparatus according to an embodiment of the present application;

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

fig. 3 shows a schematic view of a design arrangement of a sealing device according to an embodiment of the present application;

fig. 4 shows a flow diagram of a design arrangement of a sealing device according to an embodiment of the application.

Detailed Description

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

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

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 may be "directly connected" to the other element or "connected" to the other element through a third element.

As mentioned in the background of the invention, in order to solve the problem of low design efficiency of the sealing strip in the prior art, in an exemplary embodiment of the present application, a method for designing a sealing device, a device for designing the sealing device, a computer-readable storage medium, a processor, and a rail vehicle are provided.

According to an embodiment of the present application, a method of designing a sealing apparatus is provided.

Fig. 1 is a flow chart of a method of designing a sealing apparatus according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:

step S101, obtaining an analysis model of sealing equipment, wherein the sealing equipment comprises a sealing element and an assembly element which are arranged in a contact manner;

step S102, 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 element, and the stress range is a stress range which represents that the sealing effect of the sealing element is qualified;

step S103, 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 step S104, 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 enable the sealing effect corresponding to the adjusted analysis model to be 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.

In the design method of the sealing equipment, firstly, an analysis model of a sealing element and an assembly part which are arranged in a contact mode is obtained; then, according to the analysis model, determining simulated contact stress and a stress range, wherein the simulated contact stress is a contact stress value of a contact position of the sealing element and the assembly obtained through simulation, and the stress range is a stress range which represents that the sealing effect of the sealing element is qualified; then, under the condition that the simulated contact stress is in the stress range, determining that the sealing effect of the sealing element is qualified, and determining that the sealing equipment is final sealing equipment; and finally, 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. Compared with the problem that the design efficiency of the sealing rubber strip is low in the prior art, the design method of the sealing equipment determines the simulated contact stress and the stress range through the analysis model, determines whether the sealing effect of the sealing element is qualified or not by comparing whether the contact stress is in the stress range, and enables the adjusted sealing effect of the sealing element to be qualified or not by adjusting the initial design parameters of the analysis model under the condition that the simulated contact stress is not in the stress range, thereby realizing the purpose that whether the sealing property of the sealing element is qualified or not based on the contact stress simulation analysis, ensuring the sealing property of the sealing element in the sealing equipment obtained by the method to be good, and avoiding the problem that the design cycle of the sealing element is long and the cost is high due to the fact that the physical detection is carried out by processing a physical sample in the prior art, the design period is short, the cost is low, and the overall design efficiency is high.

In practical applications, the sealing element comprises a sealing strip without a sealing adhesive.

In a specific embodiment, the dimensional data indicates dimensions of the sealing member and dimensions of the fitting in the sealing device, the assembly tolerance indicates a fitting accuracy of the sealing member and the fitting, and is a variation that allows a clearance or interference between the sealing member and the fitting, and the material property indicates a characteristic property (i.e., a property inherent in a material) and a functional property (i.e., a property that converts an action into another form of function by a material when the action is applied to the material under certain conditions and within certain limits) of a material used for the sealing member and the fitting.

According to a specific embodiment of the present application, obtaining an analytical model of a 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. By establishing the target geometric model of the sealing equipment and performing finite element analysis on the target geometric model, the simulation optimization of the design of the sealing equipment is further realized, the problem of low design efficiency of the sealing rubber strip in the prior art is further avoided, and the short design period and the low design cost of the sealing equipment are further ensured.

In a specific embodiment, the finite element analysis of the target geometric model is performed as follows: the geometric model is established in Abaqus (general finite element analysis software) software, and Abaqus comprises a rich unit library capable of simulating any geometric shape and various types of material model libraries capable of simulating the performance of typical engineering materials.

In particular, finite element analysis is a mathematical approximation of a seal that can be modeled using interacting seals and fittings to approximate an infinite unknown true seal with a finite number of unknowns.

According to another specific embodiment of the present application, performing finite element analysis on the target geometric model to obtain the analysis model, includes: under the condition that the target geometric model is a three-dimensional model, carrying out hexahedron unit mesh division on the target geometric model to obtain the analysis model; and under the condition that the target geometric model is a two-dimensional model, tetrahedral unit meshing is carried out on the target geometric model to obtain the analysis model.

In a specific embodiment, the three-dimensional model is subjected to meshing by a sweeping method and is simulated by hexahedral units, the two-dimensional model is simulated by tetrahedral units and is emphasized to perform mesh refinement on the contact positions, the meshing is performed by Abaqus software or Hypermesh software, and of course, other software with the same function can be used to complete the meshing.

According to another specific embodiment of the present application, determining a simulated contact stress according to the analysis model comprises: acquiring an actual load parameter, a material attribute and a corresponding friction coefficient, wherein the actual load parameter is a force directly applied to 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 property, the corresponding friction coefficient and the analysis model. In this embodiment, the simulated contact stress is determined according to the obtained actual load parameter, the material property, and the corresponding friction coefficient, so that the simulated contact stress is relatively close to the contact stress between the sealing element and the assembly element in the actual use process of the sealing device, and the simulated contact stress is ensured to be relatively strong in authenticity, and the sealing device obtained by the method of the present application is further ensured to have a relatively good sealing effect while the design cycle of the sealing device is further ensured to be relatively short.

Specifically, the simulated contact stress is obtained by assigning the actual load parameter, the material property, and the corresponding friction coefficient to the analysis model.

In a specific embodiment, the friction parameter is obtained by performing a sliding friction test on the grinding plate, wherein the material of the sealing element is the same as that of the assembly element.

In order to further ensure that the design cycle of the sealing device is short, according to an embodiment of the present application, the determining the stress range according to the analysis model includes: 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. The critical contact stress is determined by obtaining the test conditions when the historical sealing equipment begins to leak water in the rain test, and then the stress range is determined to be larger than the critical contact stress range, so that the requirement that the stress range can meet the practical application process and can not leak water is met, and the sealing effect of the sealing equipment determined according to the stress range is better, the problem that the design efficiency is low due to the fact that the sealing equipment is subjected to sample test is further avoided, and the design period of the sealing equipment is further short and the cost is lower.

The boundary condition is obtained by applying a rain test to the window under the condition that the vehicle body and the interior panel are fixed and the seal is fitted to the vehicle body, the fitting and the window in an interference manner.

In order to further ensure that the sealing effect of the sealing device is better, according to another specific embodiment of the present application, the simulating the boundary condition by using the analysis model, and calculating to obtain the critical contact stress corresponding to the boundary condition includes: obtaining the critical contact stress of the analysis model under the boundary condition; obtaining 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 the first contact stress and the second contact stress are both larger than the critical contact stress; determining a ratio of said first contact stress to said critical contact stress as a first safety factor, a ratio of said second contact stress to said critical contact stress as a second safety factor, said range of stresses corresponding to when said seal is installed on said fitting being a range greater than said first safety factor, said range of stresses corresponding to after said predetermined length of time of use of said seal being a range greater than said second safety factor. By acquiring the first contact stress and the second contact stress, wherein the first contact stress and the second contact stress are both greater than the critical contact stress, determining the first safety factor and the second safety factor, and determining the stress range according to the first safety factor and the second safety factor, namely, the application considers the contact stress change conditions of the sealing element in the initial use stage and after a preset period of use in the actual working condition while meeting the water-tight standard of the sealing equipment, ensures that the obtained stress range can meet the sealing effect requirements of the sealing element in the initial installation stage and after the preset period of use, and further ensures that the sealing effect of the sealing equipment determined according to the stress range is better.

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

Specifically, as shown in fig. 2, the minimum stress value when the sealing member is mounted on the assembly is a; after the sealing element is used for the preset time t, stress relaxation occurs and the sealing element is basically stable, and then a contact stress value B corresponds to; the critical contact pressure is C, and the first contact stress a and the second contact stress B are both greater than the critical contact stress standard C, so that the sealing performance of the sealing element 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, the first sub-material property is a material parameter equivalent to the seal when the seal is installed on the assembly, the second sub-material property is a material parameter equivalent to the seal after the seal is used for the predetermined period of time, and the simulated contact stress is obtained according to the actual load parameter, the material properties, the corresponding friction coefficient, and the analysis model, including: 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 property, 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. Determining said material properties as said first sub-material property and said second sub-material property, based on both an initial stage of installation of said seal onto said assembly and a later stage of use of said predetermined length of time, and determining said simulated contact pressure based on two different said material properties, ensures that said first contact stress and said second contact stress more closely approximate actual use of said sealing device, further ensuring simulated authenticity and accuracy of said contact stress.

Of course, in the practical application process, the method is not limited to the above-mentioned first sub-material property and the above-mentioned second sub-material property, and a person skilled in the art may set various sub-material properties for higher simulation accuracy and qualitative performance.

In a specific embodiment, the first sub-material property is obtained by fitting uniaxial stretching, biaxial stretching, plane shearing and volume compression test data, and the second sub-material property is obtained by fitting the super-elastic constitutive parameter and the viscous elastic constitutive parameter, wherein the viscous elastic constitutive parameter is obtained by fitting stress relaxation test data.

The embodiment of the present application further provides a device for designing a sealing apparatus, and it should be noted that the device for designing a sealing apparatus according to the embodiment of the present application may be used to execute the method for designing a sealing apparatus according to the embodiment of the present application. The following describes a design device of a sealing apparatus provided in an embodiment of the present application.

Fig. 3 is a schematic view of a design apparatus of a sealing device according to an embodiment of the present application. As shown in fig. 3, the apparatus includes an obtaining unit 10, a first determining unit 20, a second determining unit 30, and a third determining unit 40, wherein the obtaining unit 10 is configured to obtain an analysis model of a sealing device, the sealing device includes a sealing member and a fitting member, which are arranged in contact with each other; the first determining unit 20 is configured to determine a simulated contact stress and a stress range according to the analysis model, where 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 member contacts the assembly, and the stress range is a stress range that is acceptable for representing a sealing effect of the sealing member; the second determining unit 30 is configured to determine that the sealing effect of the sealing member is acceptable and determine that the sealing device is a final sealing device when the simulated contact stress is within the stress range; the third determining unit 40 is 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, wherein the sealing equipment corresponding to the adjusted analysis model is final sealing equipment, and the initial design parameters include dimensional data, assembly tolerance, and material performance.

In the design device of the sealing equipment, the acquisition unit acquires an analysis model of the sealing element and the assembly part which are arranged in contact with each other; determining, by the first determining unit, a 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 of the sealing element and the assembly obtained through simulation, and the stress range is a stress range which indicates that a sealing effect of the sealing element is acceptable; determining, by the second determining unit, that the sealing effect of the sealing member is acceptable and that the sealing device is a final sealing device, when the simulated contact stress is within the stress range; and determining that the sealing effect is unqualified by the third determining unit under the condition that the simulated contact stress is not in the stress range, and adjusting initial design parameters of the analysis model to enable the sealing effect corresponding to the adjusted analysis model to be 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. Compared with the problem that the design efficiency of the sealing rubber strip is low in the prior art, the design device of the sealing equipment determines the simulated contact stress and the stress range through the analysis model, determines whether the sealing effect of the sealing element is qualified or not by comparing whether the contact stress is in the stress range, and enables the adjusted sealing effect of the sealing element to be qualified or not by adjusting the initial design parameters of the analysis model under the condition that the simulated contact stress is not in the stress range, thereby realizing the purpose that whether the sealing property of the sealing element is qualified or not based on the contact stress simulation analysis, ensuring the sealing property of the sealing element in the sealing equipment obtained by the device to be good, and avoiding the problem that the design cycle of the sealing element is long and the cost is high due to the fact that the physical detection is carried out by processing a physical sample in the prior art, the design period is short, the cost is low, and the overall design efficiency is high.

In a specific embodiment, the dimensional data represents the dimensions of the sealing element and the fitting element in the sealing device, the assembly tolerance represents the precision of the fit of the sealing element to the fitting element, and is a variation that allows clearance or interference between the sealing element and the fitting element, and the material property represents a characteristic property (i.e., a property inherent to the material) and a functional property (i.e., a property that converts an action into another form of function by the material when the action is applied to the material under certain conditions and within certain limits) of the materials used for the sealing element and the fitting element.

According to a specific embodiment of the present application, the obtaining unit includes a first obtaining module, an establishing module, and an analyzing module, wherein the first obtaining module is configured to obtain the initial design parameter; the establishing module is used for establishing a target geometric model of the sealing equipment according to the initial design parameters; the analysis module is used for carrying out finite element analysis on the target geometric model to obtain the analysis model. By establishing the target geometric model of the sealing equipment and performing finite element analysis on the target geometric model, the simulation optimization of the design of the sealing equipment is further realized, the problem of low design efficiency of the sealing rubber strip in the prior art is further avoided, and the short design period and the low design cost of the sealing equipment are further ensured.

In a specific embodiment, the finite element analysis of the target geometric model is performed as follows: the geometric model is established in Abaqus (Universal finite element analysis software) software, and the Abaqus comprises a rich unit library capable of simulating any geometric shape and various types of material model libraries capable of simulating the performance of typical engineering materials.

According to another specific embodiment of the present application, the analysis module includes a first dividing sub-module and a second dividing sub-module, where the first dividing sub-module is configured to perform hexahedral cell meshing on the target geometric model to obtain the analysis model when the target geometric model is a three-dimensional model; and the second division submodule is used for carrying out tetrahedral unit mesh division on the target geometric model under the condition that the target geometric model is a two-dimensional model to obtain the analysis model.

According to another specific embodiment of the present application, the first determining unit includes a second obtaining module and a processing module, wherein the second obtaining module is configured to obtain an actual load parameter, a material property and a corresponding friction coefficient, the actual load parameter is a force directly exerted on the sealing element during the use of the sealing device, the material property is a parameter of an equivalent material of the sealing element during the use of the sealing device, and the friction coefficient is a friction coefficient of the contact position; the processing module is used for obtaining the simulated contact stress according to the actual load parameter, the material property, the corresponding friction coefficient and the analysis model. In this embodiment, the simulated contact stress is determined according to the obtained actual load parameter, the obtained material property, and the obtained corresponding friction coefficient, so that the simulated contact stress is relatively close to the contact stress between the sealing element and the assembly element in the actual use process of the sealing device, the simulated contact stress is guaranteed to be relatively strong in authenticity, and the sealing device obtained by the device of the present application is further guaranteed to have a relatively good sealing effect while the sealing device is further guaranteed to have a relatively short design cycle.

In order to further ensure that the design period of the sealing device is short, according to a specific embodiment of the present application, the first determining unit further includes a third obtaining module and a fourth obtaining module, where the third obtaining module is configured to obtain a boundary condition, and the boundary condition is a test condition corresponding to a historical sealing device beginning to leak water in a rain test; the fourth obtaining module is configured to obtain a critical contact stress of the analysis model under the boundary condition, where the stress range is a range greater than the critical contact stress. The critical contact stress is determined by obtaining the test conditions when the historical sealing equipment begins to leak water in the rain test, and then the stress range is determined to be larger than the critical contact stress range, so that the requirement that the stress range can meet the practical application process and can not leak water is met, and the sealing effect of the sealing equipment determined according to the stress range is better, the problem that the design efficiency is low due to the fact that the sealing equipment is subjected to sample test is further avoided, and the design period of the sealing equipment is further short and the cost is lower.

In order to further ensure that the sealing effect of the sealing device is better, according to another specific embodiment of the present application, the fourth obtaining module includes a first obtaining submodule, a second obtaining submodule, and a determining submodule, where the first obtaining submodule is configured to obtain the critical contact stress of the analysis model under the boundary condition; the second obtaining submodule is used for obtaining a first contact stress and a second contact stress, 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, and the first contact stress and the second contact stress are both greater than the critical contact stress; the determining submodule is configured to determine a ratio of the first contact stress to the critical contact stress as a first safety factor, a ratio of the second contact stress to the critical contact stress as a second safety factor, the range of stresses corresponding to when the seal is installed on the fitting being a range greater than the first safety factor, and the range of stresses corresponding to after the seal has been in use for the predetermined period of time being a range greater than the second safety factor. The first contact stress and the second contact stress are obtained, meanwhile, the first contact stress and the second contact stress are larger than the critical contact stress, the first safety coefficient and the second safety coefficient are determined, and the stress range is determined according to the first safety coefficient and the second safety coefficient.

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

According to another specific embodiment of the present application, the material properties include a first sub-material property and a second sub-material property, the first sub-material property is a material parameter equivalent to the sealing member when the sealing member is mounted to the mounting member, the second sub-material property is a material parameter equivalent to the sealing member after the sealing member is used for the predetermined time period, the processing module includes a first processing sub-module, a second processing sub-module and a third obtaining sub-module, wherein the first processing sub-module is configured to obtain a first contact stress according to the actual load parameter, the first sub-material property, the corresponding friction coefficient and the analysis model; the second processing submodule is used for obtaining a second contact stress according to the actual load parameter, the second sub-material attribute, the corresponding friction coefficient and the analysis model; the third obtaining submodule is configured to 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. Determining said material properties as said first sub-material property and said second sub-material property, based on both an initial stage of installation of said seal onto said assembly and a later stage of use of said predetermined length of time, and determining said simulated contact pressure based on two different said material properties, ensures that said first contact stress and said second contact stress more closely approximate actual use of said sealing device, further ensuring simulated authenticity and accuracy of said contact stress.

The design device of the sealing device comprises a processor and a memory, wherein the acquisition unit, the first determination unit, the second determination unit, the third determination unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The inner core can be set to be one or more than one, and the problem that the design efficiency of the sealing rubber strip in the prior art is low is solved by adjusting the inner core parameters.

The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.

An embodiment of the present invention provides a computer-readable storage medium on which a program is stored, the program implementing the above-described method of designing a sealing apparatus when executed by a processor.

The embodiment of the invention provides a processor, which is used for running a program, wherein the program executes the design method of the sealing equipment when running.

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:

and step S104, determining that the sealing effect is unqualified under the condition that the simulated contact stress is not in the stress range, and adjusting initial design parameters of the analysis model to enable the sealing effect corresponding to the adjusted analysis model to be 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.

The device herein may be a server, a PC, a PAD, a mobile phone, etc.

The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:

According to another exemplary embodiment of the present application, there is also provided a rail vehicle comprising a door and a window, the door and/or the window being designed using any of the above-described methods.

The rail vehicle comprises a vehicle door and a vehicle window, wherein the vehicle door and/or the vehicle window are designed by adopting any one of the methods. Compared with the problem that the design efficiency of the sealing rubber strip is low in the prior art, the rail vehicle determines the simulated contact stress and the stress range through the analysis model, determines whether the sealing effect of the sealing element is qualified by comparing whether the contact stress is in the stress range, and enables the adjusted sealing effect of the sealing element to be qualified by adjusting the initial design parameters of the analysis model under the condition that the simulated contact stress is not in the stress range, so that the determination of whether the sealing property of the sealing element is qualified based on the contact stress simulation analysis is realized, the sealing property of the sealing element in the sealing equipment obtained by the method is ensured to be good, and the problem that the design cycle of the sealing element is long and the cost is high due to the fact that the physical detection is carried out by processing a physical sample in the prior art is solved, the design period is short, 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 specifically as follows:

as shown in fig. 4, a rain test was performed;

determining the corresponding test condition of the historical sealing equipment when the historical sealing equipment starts to leak water in a rain test as the boundary condition;

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

determining the stress range to be greater than the critical contact stress range;

meanwhile, acquiring actual load parameters, material attributes and corresponding friction coefficients, and assigning the actual load parameters, the material attributes and the corresponding friction coefficients to the analysis model to obtain the simulated contact stress;

acquiring the first contact stress and the second contact stress, and determining the first safety factor and the second safety factor; said range of stress corresponding to when said seal is installed on said fitting is a range greater than said first safety factor and said range of stress corresponding to after said seal has been in use for said predetermined period of time is a range greater than said second safety factor;

and comparing whether the simulated contact stress is in the stress range, determining that the sealing effect of the sealing element is qualified and the sealing device is a final sealing device when the simulated contact stress is in the stress range, determining that the sealing effect is unqualified when the simulated contact stress is not in the stress range, and adjusting initial design parameters of the analysis model to enable the sealing effect corresponding to the adjusted analysis model to be qualified and the sealing device corresponding to the adjusted analysis model to be the final sealing device.

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

In the embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

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

1) in the design method of the sealing device, firstly, an analysis model of a sealing element and an assembly part which are arranged in a contact mode is obtained; then, according to the analysis model, determining simulated contact stress and a stress range, wherein the simulated contact stress is a contact stress value of a contact position of the sealing element and the assembly obtained through simulation, and the stress range is a stress range which represents that the sealing effect of the sealing element is qualified; then, under the condition that the simulated contact stress is within the stress range, determining that the sealing effect of the sealing element is qualified, and determining that the sealing equipment is final sealing equipment; and finally, 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. Compared with the problem that the design efficiency of the sealing rubber strip is low in the prior art, the design method of the sealing equipment determines the simulated contact stress and the stress range through the analysis model, determines whether the sealing effect of the sealing element is qualified or not by comparing whether the contact stress is in the stress range, and enables the adjusted sealing effect of the sealing element to be qualified or not by adjusting the initial design parameters of the analysis model under the condition that the simulated contact stress is not in the stress range, thereby realizing the purpose that whether the sealing property of the sealing element is qualified or not based on the contact stress simulation analysis, ensuring the sealing property of the sealing element in the sealing equipment obtained by the method to be good, and avoiding the problem that the design cycle of the sealing element is long and the cost is high due to the fact that the physical detection is carried out by processing a physical sample in the prior art, the design period is short, the cost is low, and the overall design efficiency is high.

2) In the sealing device designing apparatus of the present application, the obtaining unit obtains an analysis model of the sealing member and the fitting member which are disposed in contact; determining, by the first determining unit, a 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 of the sealing element and the assembly obtained through simulation, and the stress range is a stress range which indicates that a sealing effect of the sealing element is acceptable; determining, by the second determining unit, that the sealing effect of the sealing member is acceptable and that the sealing device is a final sealing device, when the simulated contact stress is within the stress range; and determining that the sealing effect is unqualified by the third determining unit under the condition that the simulated contact stress is not in the stress range, and adjusting initial design parameters of the analysis model to enable the sealing effect corresponding to the adjusted analysis model to be 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. Compared with the problem that the design efficiency of the sealing rubber strip is low in the prior art, the design device of the sealing equipment determines the simulated contact stress and the stress range through the analysis model, determines whether the sealing effect of the sealing element is qualified or not by comparing whether the contact stress is in the stress range, and enables the adjusted sealing effect of the sealing element to be qualified or not by adjusting the initial design parameters of the analysis model under the condition that the simulated contact stress is not in the stress range, thereby realizing the purpose that whether the sealing property of the sealing element is qualified or not based on the contact stress simulation analysis, ensuring the sealing property of the sealing element in the sealing equipment obtained by the device to be good, and avoiding the problem that the design cycle of the sealing element is long and the cost is high due to the fact that the physical detection is carried out by processing a physical sample in the prior art, the design period is short, the cost is low, and the overall design efficiency is high.

3) The rail vehicle comprises a vehicle door and a vehicle window, wherein the vehicle door and/or the vehicle window are designed by adopting any one of the methods. Compared with the problem that the design efficiency of the sealing rubber strip is low in the prior art, the rail vehicle determines the simulated contact stress and the stress range through the analysis model, determines whether the sealing effect of the sealing element is qualified by comparing whether the contact stress is in the stress range, and enables the adjusted sealing effect of the sealing element to be qualified by adjusting the initial design parameters of the analysis model under the condition that the simulated contact stress is not in the stress range, so that the determination of whether the sealing property of the sealing element is qualified based on the contact stress simulation analysis is realized, the sealing property of the sealing element in the sealing equipment obtained by the method is ensured to be good, and the problem that the design cycle of the sealing element is long and the cost is high due to the fact that the physical detection is carried out by processing a physical sample in the prior art is solved, the design period is short, the cost is low, and the overall design efficiency is high.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

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:

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.