A method and system for quantitative analysis of the sealing performance of sealing strips

Abstract

This invention relates to the field of sealing performance evaluation technology, and discloses a method and system for quantitative analysis of the sealing performance of sealing strips. The method includes: obtaining the cross-sectional shape of the target sealing strip and constructing a two-dimensional cross-sectional model of the target sealing strip based on the cross-sectional shape; meshing the two-dimensional cross-sectional model to obtain the nodes of the target sealing strip cross-section; obtaining simulation parameters of the target sealing strip and calculating the contact stress, deformation, and distance between adjacent nodes based on the simulation parameters; calculating the sealing degree of the target sealing strip based on the contact stress, deformation, and distance between adjacent nodes, and analyzing the sealing performance of the target sealing strip based on the magnitude of the sealing degree. This invention solves the problems of low efficiency and lack of standardized analysis in existing sealing strip performance analysis methods.

Description

Technical Field

[0001] This invention relates to the field of sealing performance evaluation technology, and in particular to a method and system for quantitative analysis of the sealing performance of sealing strips. Background Technology

[0002] Sealing strips are rubber strips used for sealing products. They are widely used in engineering fields such as rail transportation, automobiles, and construction machinery, where their sealing performance directly affects the normal operation of equipment and the safety of personnel. Furthermore, due to application limitations, sealing strips require corresponding cross-sectional designs for different scenarios to achieve optimal sealing performance. Sealing strips are primarily made from synthetic rubber through extrusion molding; they are highly elastic materials. Currently, sealing strip design relies heavily on the experience of designers and repeated optimization through testing after production, resulting in low design efficiency and a lack of quantitative standards. Therefore, sealing strip design urgently needs a simple method for quantitatively calculating sealing performance to improve design efficiency. Summary of the Invention

[0003] This invention provides a method and system for quantitative analysis of the sealing performance of sealing strips, in order to solve the problems of low efficiency and inability to standardize the analysis of the sealing performance of existing sealing strips.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] In a first aspect, the present invention provides a method for quantitative analysis of the sealing performance of sealing strips, comprising:

[0006] Obtain the cross-sectional shape of the target sealing strip, and construct a two-dimensional cross-sectional model of the target sealing strip based on the cross-sectional shape;

[0007] The nodes of the target sealing strip section are obtained by meshing the two-dimensional cross-sectional model;

[0008] Obtain the simulation parameters of the target sealing strip, and calculate the contact stress, deformation, and distance between adjacent nodes based on the simulation parameters;

[0009] The sealing degree of the target sealing strip is calculated based on contact stress, deformation, and distance between adjacent nodes, and the sealing performance of the target sealing strip is analyzed based on the magnitude of the sealing degree.

[0010] Optionally, the nodes of the target sealing strip cross-section are obtained by meshing the two-dimensional cross-sectional model, including:

[0011] The length, width, and area of ​​the target sealing strip cross-section are determined based on the two-dimensional cross-sectional model, and the two-dimensional cross-sectional model is meshed according to the length, width, and area of ​​the target sealing strip cross-section.

[0012] After meshing the two-dimensional model of the cross section, an integration point is determined in each mesh, and the integration point in each mesh is used as the node of the target sealing strip cross section.

[0013] Optional simulation parameters include: material parameters, assembly method, contact properties, and loading method.

[0014] Optionally, the material parameters are obtained by performing a rubber tensile test on the target sealing strip;

[0015] The assembly method is determined by the installation method and spatial relationship of the target sealing strip;

[0016] Contact properties are obtained through the contact state between the target sealing strips and the contact state between the target sealing strip and the mounting bracket;

[0017] The loading method is obtained by applying pressure to the target sealing strip from its initial state to its fully deformed state.

[0018] Optionally, the contact stress, deformation, and distance between adjacent nodes are calculated based on simulation parameters, including:

[0019] A node parameter calculation model for the target sealing strip is constructed based on simulation parameters. The contact stress, deformation, and distance between adjacent nodes are calculated using this model. The calculation model satisfies the following relationship:

[0020]

[0021] In the formula, l i Let x be the length of the i-th node. i+1 Let x be the x-coordinate of the (i+1)th node before deformation. i Let y be the x-coordinate of the i-th node before deformation. i+1 Let y be the ordinate of the (i+1)th node before deformation. i Let P be the ordinate of the i-th node before deformation. i Let F be the contact stress at the i-th node. i Let Δx be the normal force at the i-th node. i Let x be the deformation of the i-th node. i ′ Let y be the x-coordinate of the i-th node after deformation. i ′ Let Δd be the ordinate of the i-th node after deformation. i Let be the rigid body displacement of the i-th node.

[0022] Optionally, the sealing performance of the target sealing strip can be calculated based on contact stress, deformation, and distance between adjacent nodes, including:

[0023] A sealing performance calculation model for the target sealing strip is constructed based on contact stress, deformation, and distance between adjacent nodes. The sealing performance of the target sealing strip is then calculated using this model, which satisfies the following relationship:

[0024]

[0025] In the formula, Q represents the sealing degree, d represents the number of contact points of the sealing strip, and P... i Let Δx be the contact stress at the i-th node. i Let l be the deformation of the i-th node. i Let be the length of the i-th node.

[0026] Optionally, the sealing performance of the target sealing strip can be analyzed based on the degree of sealing, including:

[0027] Based on the actual application scenario of the target sealing strip, a qualified threshold for sealing performance is determined, and the sealing performance is compared with the qualified threshold for sealing performance. When the sealing performance is less than the qualified threshold for sealing performance, the sealing performance of the target sealing strip does not meet the requirements of the application scenario. When the sealing performance is greater than or equal to the qualified threshold for sealing performance, the sealing performance of the target sealing strip meets the requirements of the application scenario.

[0028] When the sealing performance of the target sealing strip meets the requirements of the application scenario, the greater the difference between the sealing degree and the qualified sealing degree threshold, the higher the sealing performance of the target sealing strip.

[0029] Secondly, embodiments of this application provide a system for quantitative analysis of the sealing performance of sealing strips, including a processor and a memory;

[0030] Memory, used to store computer programs;

[0031] When a processor executes a program stored in memory, it implements any of the steps of the method described in the first aspect.

[0032] Beneficial effects:

[0033] This invention provides a method for quantitatively analyzing the sealing performance of sealing strips. It constructs a two-dimensional cross-sectional model of the target sealing strip by obtaining its cross-sectional shape; then, it meshes the two-dimensional model to obtain the nodes of the target sealing strip cross-section; finally, it calculates the contact stress, deformation, and distance between adjacent nodes based on the simulation parameters of the target sealing strip; and then, it calculates the sealing degree of the target sealing strip based on the contact stress, deformation, and distance between adjacent nodes. Finally, it analyzes the sealing performance of the target sealing strip based on the magnitude of the sealing degree. This method can obtain quantitative indicators of sealing performance during the sealing strip design stage, facilitating designers to optimize and adjust the structure of the sealing strip, saving time on repeated design and trial production, and improving the design efficiency of sealing strips. This invention uses a two-dimensional model for simulation, which has low requirements for computer performance, high calculation speed, and low hardware barriers for engineering applications. Furthermore, it directly quantifies the sealing performance of the sealing strip based on the magnitude of the sealing degree, providing a quantitative analysis standard and further improving the efficiency of sealing strip performance analysis. Attached Figure Description

[0034] Figure 1 This is a flowchart of a method for quantitatively analyzing the sealing performance of a sealing strip according to a preferred embodiment of the present invention. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0037] Please see Figure 1 This application provides a method for quantitative analysis of the sealing performance of sealing strips, including:

[0038] Obtain the cross-sectional shape of the target sealing strip, and construct a two-dimensional cross-sectional model of the target sealing strip based on the cross-sectional shape;

[0039] The nodes of the target sealing strip section are obtained by meshing the two-dimensional cross-sectional model;

[0040] Obtain the simulation parameters of the target sealing strip, and calculate the contact stress, deformation, and distance between adjacent nodes based on the simulation parameters;

[0041] The sealing degree of the target sealing strip is calculated based on contact stress, deformation, and distance between adjacent nodes, and the sealing performance of the target sealing strip is analyzed based on the magnitude of the sealing degree.

[0042] In the above embodiments, a two-dimensional cross-sectional model of the target sealing strip is constructed by obtaining the cross-sectional shape of the target sealing strip; the two-dimensional cross-sectional model is then meshed to obtain the nodes of the target sealing strip cross-section; the contact stress, deformation, and distance between adjacent nodes are calculated based on the simulation parameters of the target sealing strip; the sealing degree of the target sealing strip can then be calculated based on the contact stress, deformation, and distance between adjacent nodes, and finally the sealing performance of the target sealing strip is analyzed based on the magnitude of the sealing degree. This method can obtain quantitative indicators of sealing performance during the design stage of the sealing strip, which facilitates the optimization and adjustment of the sealing strip structure by sealing strip designers, saves time in repeated design and trial production of sealing strips, and improves the design efficiency of sealing strips. This invention uses a two-dimensional model for simulation, which has low requirements for computer performance, fast calculation speed, low hardware threshold for engineering applications, and directly quantifies the sealing performance of the sealing strip through the magnitude of the sealing degree, providing a quantitative analysis standard and further improving the analysis efficiency of the sealing performance of the sealing strip.

[0043] Optionally, the nodes of the target sealing strip cross-section are obtained by meshing the two-dimensional cross-sectional model, including:

[0044] The length, width, and area of ​​the target sealing strip cross-section are determined based on the two-dimensional cross-sectional model, and the two-dimensional cross-sectional model is meshed according to the length, width, and area of ​​the target sealing strip cross-section.

[0045] After meshing the two-dimensional model of the cross section, an integration point is determined in each mesh, and the integration point in each mesh is used as the node of the target sealing strip cross section.

[0046] In this embodiment, mesh generation is a necessary step in CAE simulation analysis. This step discretizes the complete adhesive strip cross-section model into individual integration points, preparing for subsequent numerical calculations in the CAE software.

[0047] Optional simulation parameters include: material parameters, assembly method, contact properties, and loading method.

[0048] Optionally, the material parameters are obtained by performing a rubber tensile test on the target sealing strip;

[0049] The assembly method is determined by the installation method and spatial relationship of the target sealing strip;

[0050] Contact properties are obtained through the contact state between the target sealing strips and the contact state between the target sealing strip and the mounting bracket;

[0051] The loading method is obtained by applying pressure to the target sealing strip from its initial state to its fully deformed state.

[0052] In this embodiment, material parameters refer to the constitutive model parameters of the rubber, which can be obtained from existing literature or through rubber tensile tests. This step is crucial for simulation accuracy. By inputting the parameters of the actual sealing strip during operation and its own property parameters, the deformation of the sealing strip during operation can be reproduced as realistically as possible. The constitutive model parameters of the rubber can define the "hardness" and "toughness" of the rubber. The assembly method can define the installation method and spatial relationship of the sealing strip. The contact properties can define the contact state between sealing strips and between the sealing strip and the mounting support. The loading method can define the process of the sealing strip from its initial state to complete deformation; this method uses a positional displacement loading method.

[0053] Optionally, the contact stress, deformation, and distance between adjacent nodes are calculated based on simulation parameters, including:

[0054] A node parameter calculation model for the target sealing strip is constructed based on simulation parameters. The contact stress, deformation, and distance between adjacent nodes are calculated using this model. The calculation model satisfies the following relationship:

[0055]

[0056] In the formula, l i Let x be the length of the i-th node. i+1 Let x be the x-coordinate of the (i+1)th node before deformation. i Let y be the x-coordinate of the i-th node before deformation. i+1 Let y be the ordinate of the (i+1)th node before deformation. i Let P be the ordinate of the i-th node before deformation. i Let F be the contact stress at the i-th node. i Let Δx be the normal force at the i-th node. i Let x be the deformation of the i-th node. i ′Let y be the x-coordinate of the i-th node after deformation. i ′ Let Δd be the ordinate of the i-th node after deformation. i Let be the rigid body displacement of the i-th node.

[0057] In this embodiment, the distance between adjacent nodes can be obtained through the node length. The length of the adjacent node can be obtained through the node length, and the distance between adjacent nodes can be calculated through the length of the adjacent node. When calculating the distance between adjacent nodes, the distance between the center points of the nodes is mainly calculated. That is, when calculating the distance between adjacent nodes using the length of the adjacent nodes, the center point positions of the two adjacent nodes are obtained first, and the distance between adjacent nodes can be calculated through the center point positions and the node length.

[0058] Optionally, the sealing performance of the target sealing strip can be calculated based on contact stress, deformation, and distance between adjacent nodes, including:

[0059] A sealing performance calculation model for the target sealing strip is constructed based on contact stress, deformation, and distance between adjacent nodes. The sealing performance of the target sealing strip is then calculated using this model, which satisfies the following relationship:

[0060]

[0061] In the formula, Q represents the sealing degree, d represents the number of contact points of the sealing strip, and P... i Let Δx be the contact stress at the i-th node. i Let l be the deformation of the i-th node. i Let be the length of the i-th node.

[0062] In this embodiment, the contact stress, deformation, and distance between adjacent nodes at each node of the sealing strip's cross-section are obtained. During mesh generation, the contact edge mesh can be set to a specific value, which can then be directly substituted into the formula during calculation, simplifying the process. The formula in this method requires the above three parameters. The reasons for selecting these parameters from the numerous parameters in the calculation results are as follows: The magnitude of the contact stress at a certain point on the sealing strip determines the sealing effect in that area; the greater the contact stress, the tighter the strip is pressed, and the better the sealing effect. With the same contact stress, the longer the contact length on the cross-section, the better the sealing effect. Contact stress, contact length, and sealing effect are positively correlated. Deformation does not directly affect the sealing effect, but excessive deformation will generate large stress, affecting the service life of the sealing strip. Therefore, this method considers deformation to be negatively correlated with the sealing effect.

[0063] Optionally, the sealing performance of the target sealing strip can be analyzed based on the degree of sealing, including:

[0064] Based on the actual application scenario of the target sealing strip, a qualified threshold for sealing performance is determined, and the sealing performance is compared with the qualified threshold for sealing performance. When the sealing performance is less than the qualified threshold for sealing performance, the sealing performance of the target sealing strip does not meet the requirements of the application scenario. When the sealing performance is greater than or equal to the qualified threshold for sealing performance, the sealing performance of the target sealing strip meets the requirements of the application scenario.

[0065] When the sealing performance of the target sealing strip meets the requirements of the application scenario, the greater the difference between the sealing degree and the qualified sealing degree threshold, the higher the sealing performance of the target sealing strip.

[0066] This application also provides a system for quantitatively analyzing the sealing performance of sealing strips, including a processor and a memory;

[0067] Memory, used to store computer programs;

[0068] When a processor executes a program stored in memory, it implements any of the steps described in the method for quantitative analysis of the sealing performance of sealing strips.

[0069] The above-mentioned sealing strip sealing performance quantitative analysis system can realize all embodiments of the above-mentioned sealing strip sealing performance quantitative analysis method and achieve the same beneficial effects, which will not be elaborated here.

[0070] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A method for quantitatively analyzing the sealing performance of sealing strips, characterized in that, include: Obtain the cross-sectional shape of the target sealing strip, and construct a two-dimensional cross-sectional model of the target sealing strip based on the cross-sectional shape; The nodes of the target sealing strip cross-section are obtained by meshing the two-dimensional model of the cross-section; Obtain the simulation parameters of the target sealing strip, and calculate the contact stress, deformation, and distance between adjacent nodes based on the simulation parameters; The sealing degree of the target sealing strip is calculated based on the contact stress, the deformation amount, and the distance between adjacent nodes, and the sealing performance of the target sealing strip is analyzed based on the magnitude of the sealing degree. The calculation of the sealing degree of the target sealing strip based on the contact stress, the deformation, and the distance between adjacent nodes includes: Based on the contact stress, the deformation, and the distance between adjacent nodes, a sealing performance calculation model for the target sealing strip is constructed. The sealing performance of the target sealing strip is then calculated using this model, which satisfies the following relationship: ； In the formula, For sealing, This refers to the number of nodes in the contact area of ​​the sealing strip. Let be the contact stress at the i-th node. Let i be the deformation of the i-th node. Let be the length of the i-th node.

2. The method for quantitative analysis of the sealing performance of sealing strips according to claim 1, characterized in that, The process of meshing the two-dimensional model of the cross-section to obtain the nodes of the target sealing strip cross-section includes: The length, width, and area of ​​the target sealing strip cross-section are determined based on the cross-sectional two-dimensional model, and the cross-sectional two-dimensional model is meshed according to the length, width, and area of ​​the target sealing strip cross-section. After meshing the two-dimensional model of the cross section, an integration point is determined in each mesh, and the integration point in each mesh is used as the node of the target sealing strip cross section.

3. The method for quantitative analysis of the sealing performance of sealing strips according to claim 1, characterized in that, The simulation parameters include: material parameters, assembly method, contact properties, and loading method.

4. The method for quantitative analysis of the sealing performance of the sealing strip according to claim 3, characterized in that, The material parameters were obtained by conducting a rubber tensile test on the target sealing strip; The assembly method is determined by the installation method and spatial relationship of the target sealing strip; The contact properties are obtained through the contact state between the target sealing strip and the contact state between the target sealing strip and the mounting bracket; The loading method is achieved by applying pressure to the target sealing strip from its initial state to its fully deformed state.

5. The method for quantitative analysis of the sealing performance of sealing strips according to claim 1, characterized in that, The calculation of contact stress, deformation, and distance between adjacent nodes based on the simulation parameters includes: Based on the simulation parameters, a node parameter calculation model for the target sealing strip is constructed. The contact stress, deformation, and distance between adjacent nodes are calculated using this model. The calculation model satisfies the following relationship: ； In the formula, Let be the length of the i-th node. Let x be the x-coordinate of the (i+1)th node before deformation. Let x be the x-coordinate of the i-th node before deformation. Let be the ordinate of the (i+1)th node before deformation. Let be the ordinate of the i-th node before deformation. Let be the contact stress at the i-th node. For the positive pressure at the i-th node, Let i be the deformation of the i-th node. Let x be the x-coordinate of the i-th node after deformation. Let be the ordinate of the i-th node after deformation. .

6. The method for quantitative analysis of the sealing performance of sealing strips according to claim 1, characterized in that, The analysis of the sealing performance of the target sealing strip based on the degree of sealing includes: Based on the actual application scenario of the target sealing strip, a qualified sealing threshold is determined, and the sealing performance is compared with the qualified sealing threshold. When the sealing performance is less than the qualified sealing threshold, the sealing performance of the target sealing strip does not meet the application scenario requirements. When the sealing performance is greater than or equal to the qualified sealing threshold, the sealing performance of the target sealing strip meets the application scenario requirements. When the sealing performance of the target sealing strip meets the requirements of the application scenario, the greater the difference between the sealing degree and the sealing degree qualification threshold, the higher the sealing performance of the target sealing strip.

7. A system for quantitatively analyzing the sealing performance of sealing strips, characterized in that, Including processor and memory; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the steps of the method described in any one of claims 1-6.

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