Tire cord thread stress analysis result processing method and device and electronic equipment

Abstract

The invention discloses a tire cord stress analysis result processing method and device and electronic equipment. The method comprises the steps that an inflation simulation result of a target tire is obtained, the inflation simulation result is used for reflecting stress information of each cord thread node of a cord thread of the target tire, and the cord thread nodes are minimum calculation units forming the geometrical shape of the cord thread; a stress curve corresponding to the stress information is determined, the stress curve extends in the direction of a cord thread curve, and the cord thread curve is a continuous geometric curve presented on the cross section of the target tire; and combining the cord curve and the stress curve to obtain a target image. According to the tire cord thread stress analysis method and device, the technical problem that the stress distribution and the change trend of each cord thread under the actual stress working condition are difficult to intuitively reflect by the stress analysis result of the tire cord thread in the related technology is solved.

Description

Technical Field

[0001] This application relates to the field of data processing technology, and more specifically, to a method, apparatus, and electronic device for processing the stress analysis results of tire cords. Background Technology

[0002] As a key component of tire reinforcement structure, tire cords directly affect tire load capacity, handling, wear resistance, and safety. Accurately understanding the stress distribution of cords under different operating conditions is crucial for optimizing tire design and improving product performance. However, current technologies primarily depict cord stress by stretching the cords onto a Cartesian coordinate system, making it difficult to intuitively reflect the stress distribution and trends of each cord under actual operating conditions.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This application provides a method, apparatus, and electronic device for processing the stress analysis results of tire cords, so as to at least solve the technical problem that the stress analysis results of tire cords in related technologies are difficult to intuitively reflect the stress distribution and changing trend of each cord under actual stress conditions.

[0005] According to one aspect of the embodiments of this application, a method for processing the stress analysis results of tire cords is provided, comprising: acquiring inflation simulation results of a target tire, wherein the inflation simulation results are used to reflect the stress information of each cord node of the target tire cord, and the cord node is the smallest calculation unit constituting the geometric shape of the cord; determining a stress curve corresponding to the stress information, wherein the stress curve extends along the direction of the cord curve, and the cord curve is a continuous geometric curve of the cord on the cross-section of the target tire; and merging the cord curve and the stress curve to obtain a target image.

[0006] In some embodiments of this application, determining the force curve corresponding to the force information includes: obtaining the force information and coordinate information of each cord node from the inflation simulation results; determining the normal direction between any two adjacent nodes in the cord node based on the coordinate information, wherein the normal direction is used to represent the direction perpendicular to the cord curve at each cord node; and plotting the force information of each cord node on the coordinate system corresponding to the normal direction to obtain the force curve.

[0007] In some embodiments of this application, determining the normal direction between any two adjacent nodes in a curtain node based on coordinate information includes: determining the distance between the coordinate information of a first curtain node and the coordinate information of a second curtain node, wherein the first curtain node and the second curtain node are any two adjacent nodes in the curtain node; determining the first direction component and the second direction component of the unit vector corresponding to the first curtain node and the second curtain node based on the distance, wherein the first direction component and the second direction component are used to determine the direction of the line connecting the first curtain node and the second curtain node; and determining the normal direction based on the first direction component and the second direction component.

[0008] In some embodiments of this application, the method further includes: determining the scale position information corresponding to each cord node, wherein the scale position information is used to reflect the position of the force information relative to the cord curve.

[0009] In some embodiments of this application, the force information of each cord node is plotted on a coordinate system corresponding to the normal direction to obtain a force curve, including: determining the scale length corresponding to the force information of each cord node, wherein the scale length is used to reflect the magnitude of the force on the cord node; determining the target coordinates of the cord node in the normal direction based on the positive and negative values ​​corresponding to the force information and the scale length; and connecting all the target coordinates to obtain the force curve.

[0010] In some embodiments of this application, determining the target coordinates of the cord node in the normal direction based on the positive and negative values ​​of the force information and the scale length includes: acquiring a set of force information corresponding to multiple third cord nodes; when all force values ​​in the force information set are positive, determining the target coordinates in a first direction along the cord curve, wherein the first direction includes the side of the normal direction away from the centerline of the target tire relative to the center of the tire cross-section; when all force values ​​in the force information set are negative, determining the target coordinates in a second direction along the cord curve, wherein the second direction includes the side of the normal direction pointing towards the centerline of the target tire relative to the center of the tire cross-section; when the force values ​​in the force information set include both positive and negative values, fixing the midpoint of the scale on the cord curve and determining the target coordinates based on the midpoint of the scale, wherein the midpoint of the scale is the dividing point between positive and negative forces.

[0011] In some embodiments of this application, before determining the force curve corresponding to the force information, the method further includes: determining the target cord node corresponding to the loop-wrapped section of the cord of the target tire, wherein the loop-wrapped section is a loop-shaped structure formed by the cord of the target tire at the edge of the tire body through a loop-wrapping process; and deleting the target force information corresponding to the target cord node from the force information.

[0012] According to another aspect of the embodiments of this application, a processing device for tire cord stress analysis results is also provided, comprising: an acquisition module for acquiring inflation simulation results of a target tire, wherein the inflation simulation results are used to reflect the stress information of each cord node of the target tire cord, and the cord node is the smallest calculation unit constituting the geometric shape of the cord; a determination module for determining the stress curve corresponding to the stress information, wherein the stress curve extends along the direction of the cord curve, and the cord curve is a continuous geometric curve presented by the cord on the cross-section of the target tire; and a merging module for merging the cord curve and the stress curve to obtain a target image.

[0013] According to another aspect of the embodiments of this application, an electronic device is also provided, including: a memory and a processor, wherein the memory is used to store program instructions; the processor is connected to the memory and is used to execute the processing method for implementing the above-described tire cord stress analysis results.

[0014] According to another aspect of the embodiments of this application, a non-volatile storage medium is also provided, the non-volatile storage medium including a stored computer program, wherein the device containing the non-volatile storage medium executes the above-mentioned method for processing the stress analysis results of tire cords by running the computer program.

[0015] According to another aspect of the embodiments of this application, a computer program product is also provided, including computer instructions that, when executed by a processor, implement the above-described method for processing the stress analysis results of tire cords.

[0016] In this embodiment, a combination of data extraction and graphical mapping is used to obtain the stress information of each cord node and determine the corresponding stress curve. The stress curve extends along the natural and continuous geometric path of the cord on the tire cross-section, making the stress information closely related to the physical position of the cord. This achieves the goal of accurately displaying the stress details of the tire cord, thereby significantly improving the analysis efficiency and the intuitiveness of the results. It also solves the technical problem that the stress analysis results of tire cords in related technologies are difficult to intuitively reflect the stress distribution and changing trend of each cord under actual stress conditions. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a hardware structure block diagram of a computer terminal for processing the results of a tire cord stress analysis according to an embodiment of this application.

[0019] Figure 2This is a flowchart of a method for processing the stress analysis results of tire cords according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of a two-dimensional tire finite element model of a method for processing the stress analysis results of tire cords according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the tire carcass cord and its stress, illustrating a method for processing the stress analysis results of tire cords according to an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of a device for processing the stress analysis results of tire cords according to an embodiment of this application. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] To better understand the embodiments of this application, the technical terms involved in the embodiments of this application are explained below:

[0026] Finite Element Analysis (FEA) involves dividing a system into a finite number of small components or units, each of which can be approximated by a set of algebraic equations. An approximate solution for the entire system is then obtained by solving these equations. In this embodiment, FEA is used to simulate the stress conditions of the internal structure of a tire under conditions such as inflation, and is a fundamental technology for obtaining stress information about cord nodes.

[0027] Inflation Simulation: Within the framework of finite element analysis, this simulation increases the internal gas pressure of a tire to a specified value to analyze the stress, deformation, and other mechanical properties of the tire structure under inflated conditions. In this embodiment, the inflation simulation results provide a direct source of stress information for the cord nodes and serve as the starting point for the entire analysis process.

[0028] Carcass Line: Carcass line is a high-strength, high-modulus fiber or metal thread. In tire manufacturing, it is woven into a ply to form the tire's skeleton layer. The material of the carcass line can be steel wire, nylon, polyester, aramid, etc. Its arrangement and density within the tire directly affect the tire's stiffness, strength, and other dynamic performance characteristics. In this embodiment, by performing inflation simulation and stress analysis on the carcass line, and using graphical processing methods to visually display its stress distribution, engineers can gain a deeper understanding of the carcass line's mechanical behavior under different operating conditions, thereby optimizing tire design and improving product performance and safety.

[0029] Carcass Node: The smallest geometric unit in the finite element model of the internal cord layer of a tire. Each node has specific coordinates and force data. In the embodiments of this application, the carcass node is the key point for calculating and analyzing the force of the cord. The accurate extraction of its force information is a prerequisite for realizing the graphical processing method.

[0030] Force Curve: A graphical representation of the changing trend of a specific structure or material under stress, especially for stress distributed along a linear path or curve. In this embodiment, the force curve is drawn along the geometric path of the cord, intuitively reflecting the magnitude, direction, and distribution of the force on the cord, and is a core component for visualizing the analysis results.

[0031] With the continuous development of the tire industry, tire performance simulation and structural optimization technologies have become increasingly mature, and finite element analysis has become an indispensable tool in tire research and development. In the tire finite element model, the cord, as the composite material layer that plays a major reinforcing role, directly affects the tire's strength, stiffness, handling, durability, and safety performance. Especially under high-speed driving, heavy-duty transportation, and extreme working conditions, the stress state of the cord is of decisive significance to the overall tire performance and service life. Therefore, accurately and effectively assessing the stress state of the cord is one of the core technical requirements in tire design, performance verification, and fatigue life prediction.

[0032] In traditional finite element stress analysis of tires, engineers typically rely on stress and strain contour maps of the overall structure, or extract data from specific elements and nodes through post-processing functions, to indirectly determine the stress condition of the cords. However, tire structures are complex, with the cords arranged in a multi-layered, multi-angled composite layout within the rubber matrix. As embedded reinforcements, they exhibit both curved arrangement characteristics and specific stress directions. The default display method of finite element post-processing software often presents the analysis results as a general color map or vector field, failing to intuitively and accurately reflect the stress distribution and variation trend of each cord under actual stress conditions.

[0033] In related technologies, some engineers have attempted to correlate calculation results with cord arrangement by manually selecting units or nodes, establishing local coordinate systems, performing projection transformations, and writing post-processing scripts. However, these methods often require cumbersome data processing and high levels of expertise, making the analysis time-consuming and labor-intensive, and susceptible to operational errors. The results also suffer from insufficient intuitiveness, accuracy, and repeatability. Furthermore, due to the cumbersome data processing flow, it is difficult to quickly apply these methods to various product design iterations and performance optimization processes, limiting their widespread application in engineering practice. This is especially true in application scenarios such as cord strength verification, local stress analysis, and cord path optimization, where traditional analysis methods struggle to meet engineers' dual demands for intuitive result presentation and efficient analysis.

[0034] To address the aforementioned technical problems, this application provides corresponding solutions, which are detailed below.

[0035] The method for processing the stress analysis results of tire cords provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Figure 1 A hardware block diagram of a computer terminal for processing the results of tire cord stress analysis is shown. Figure 1 As shown, the computer terminal 10 may include one or more processors (shown as 102a, 102b, ..., 102n in the figure) (the processor may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 104 for storing data, and a transmission module 106 for communication functions connected via wired and / or wireless networks. In addition, it may also include: a display, a keyboard, a cursor control device, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, and a BUS bus. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, computer terminal 10 may also include... Figure 1The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0036] It should be noted that the aforementioned one or more processors and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be implemented wholly or partially as software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be wholly or partially integrated into any other element in the computer terminal 10. As involved in the embodiments of this application, the data processing circuits serve as processor control (e.g., selection of a variable resistor termination path connected to an interface).

[0037] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the method for processing tire cord stress analysis results in this embodiment. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, thereby realizing the above-mentioned method for processing tire cord stress analysis results. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor, and these remote memories can be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0038] The transmission module 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the computer terminal 10. In one example, the transmission module 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission module 106 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0039] The display may be, for example, a touchscreen liquid crystal display (LCD) that allows the user to interact with the user interface of the computer terminal 10.

[0040] It should be noted here that, in some optional embodiments, the above... Figure 1The computer terminal shown may include hardware elements (including circuitry), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware and software elements. It should be noted that... Figure 1 This is only one instance of a specific particular instance, and is intended to illustrate the types of components that may exist in the aforementioned computer terminal.

[0041] Under the above operating environment, this application provides an embodiment of a method for processing the stress analysis results of tire cords. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0042] Figure 2 This is a flowchart illustrating a method for processing the stress analysis results of tire cords according to an embodiment of this application, as shown below. Figure 2 As shown, the method includes the following steps:

[0043] Step S202: Obtain the inflation simulation results of the target tire. The inflation simulation results are used to reflect the force information of each cord node of the target tire cord. The cord node is the smallest calculation unit that constitutes the geometry of the cord.

[0044] In step S202 above, the inflation simulation result is a simulation dataset obtained by finite element analysis (FEA) or other numerical simulation techniques for the target tire (hereinafter referred to as tire) under inflation conditions. The inflation simulation result includes mechanical performance indicators such as stress, strain, and displacement of the internal structure of the tire under air pressure, such as the stress of the cord layer under different loads.

[0045] It should be noted that in the finite element model, the tire cord layer is discretized into multiple tiny elements. The vertex of each element is called a node. Among them, the cord node represents the smallest computational unit that constitutes the geometry of the cord. Each node has its specific coordinate position and mechanical property data, such as stress, strain or force.

[0046] In some embodiments of this application, the stress information of each cord node of the target tire can be extracted in the following way: Based on the two-dimensional material distribution map of the tire, mesh generation is performed, and sets and surfaces are established; the material constitutive model, section properties, and mesh type of the model are defined; the inflation analysis step is defined; and a two-dimensional inflation simulation of the tire is performed; a program is written to extract the stress of each node of the tire cord during two-dimensional inflation. In some embodiments of this application, since the force value calculated by the finite element method is calculated at the integration point of the element, rather than at the node, the stress at the same node of two elements may be different. Therefore, the average value of the stress at the same node of the two elements can be taken.

[0047] (1) Mesh generation and assembly surface creation.

[0048] Specifically, based on the two-dimensional material distribution map of the tire, the preprocessor of the finite element software can be used to perform mesh generation. Mesh generation discretizes the entire tire model and decomposes it into many small elements, which can better simulate the physical properties of the tire material.

[0049] It should be noted that the choice of mesh density and type (such as quadrilateral or triangular) can take into account the specific structure and material properties of the tire, as well as the availability of computational resources, and is not limited here. Furthermore, during mesh generation, specific regions of the cord layer can be identified, and sets and surfaces can be created for them to facilitate subsequent material property assignment and stress analysis, ensuring accurate modeling of the cord layer in inflation simulations. See [reference needed]. Figure 3 It shows the two-dimensional structure of the tire after grid division.

[0050] (2) Define material properties and inflation simulation settings.

[0051] Specifically, different materials in the tire model are assigned corresponding constitutive models and property parameters, such as elastic modulus, Poisson's ratio, and density. For the cord layer, its high strength and rigidity characteristics should be specified to reflect the actual material properties. Then, the cross-sectional properties and mesh type required for the inflation simulation analysis are defined, and suitable inflation loading modes and boundary conditions are selected, such as setting inflation pressure and axial constraints.

[0052] By defining the inflation analysis step, the simulation is started to simulate the mechanical responses such as stress and strain during the tire inflation process. This step is a prerequisite for obtaining the true stress state of the cord nodes and can ensure the accuracy and effectiveness of the simulation results.

[0053] (3) Extraction and processing of nodal force information.

[0054] Specifically, after the inflation simulation is completed, the stress information of each cord node is extracted from the simulation results using a self-developed post-processing program or the software's built-in script function.

[0055] Since force values ​​in finite element analysis are calculated at the integration points of elements, and the same node may be shared by multiple elements, it is necessary to obtain the force data of adjacent elements sharing the same node at that node separately. Then, the average of these data is calculated to accurately reflect the actual force situation at that node throughout the inflation process. To avoid bias in the node force information caused by abnormal forces in local elements, element data with forces significantly deviating from the normal range can be excluded. Only force values ​​within a reasonable range are averaged to ensure that the extracted force information reflects both the interaction between elements and avoids calculation errors, providing a reliable data foundation for subsequent graphical processing.

[0056] By implementing the above three steps sequentially, the stress information of each node of the target tire cord can be accurately and effectively extracted from the inflation simulation results. This solves the problem of inconsistency in obtaining node stress information in traditional methods and provides cord stress data that is closer to actual working conditions.

[0057] Step S204: Determine the force curve corresponding to the force information, wherein the force curve extends along the direction of the cord curve, and the cord curve is a continuous geometric curve of the cord on the cross-section of the target tire.

[0058] In step S204 above, the stress curve is a graphical representation of the stress information of the cord node along the geometric path of the cord. It intuitively reflects the magnitude, direction and distribution of the force on the cord on the tire cross section, enabling engineers to clearly identify and understand the stress state of the cord.

[0059] The cord curve is the actual geometric path of the cords on the tire's cross-section. Due to the special layout of the tire's cord layers, the cords are not straight lines but exist in curved form, and their direction and curvature may vary with the tire design. In the embodiments of this application, the cord curve is the basis for drawing the stress curve, ensuring a one-to-one correspondence between stress information and the physical location of the cords.

[0060] The geometric relationship and layout between the stress curve and the cord curve is such that the stress curve extends along the direction of the cord curve. That is, for the stress condition of each cord, the stress curve can be drawn along the actual path of the cord (i.e., the cord curve). Each point on the stress curve corresponds to a node on the cord, and its position on the stress curve matches the actual position of that node. Furthermore, the direction of the stress curve follows the natural curvature of the cord curve, ensuring accurate spatial positioning of the stress information. For example, if the tire cord presents a complex S-shaped curve in cross-section, then the stress curve will also extend along this S-shaped direction. Each stress point accurately falls on the corresponding S-shaped path, and its position and direction reflect the actual stress condition of the cord at that point.

[0061] In some embodiments of this application, a force curve can be drawn along the direction of the cord curve based on the extracted force information of the cord nodes. Specifically, the coordinates and force values ​​of each group of cord nodes (such as two adjacent nodes) can be analyzed to identify the geometric relationship between the nodes, calculate the direction of the line connecting the nodes as the extension direction of the force curve, and then draw a force information diagram on the cord curve at an appropriate scale according to the magnitude and direction of the force value.

[0062] To avoid the mismatch between force information and cord position in traditional methods, the force curve corresponding to the force information can be determined as follows: obtain the force information and coordinate information of each cord node from the inflation simulation results; determine the normal direction between any two adjacent nodes in the cord node based on the coordinate information, where the normal direction is used to represent the direction perpendicular to the cord curve at each cord node; plot the force information of each cord node on the coordinate system corresponding to the normal direction to obtain the force curve.

[0063] Specifically, the force information includes the magnitude and direction of the force values ​​(such as tension, compression, shear, etc.) at each cord node in the inflation simulation, and the coordinate information includes the position information of each cord node in the tire cross-section coordinate system, including x and y coordinates, which are used to determine the accurate location of the force information in space.

[0064] The normal direction refers to the direction perpendicular to the cord curve at each cord node. Determining the normal direction is a crucial step in drawing the stress curve, ensuring that stress information is accurately mapped onto the cord path and maintaining the relative parallelism between the stress curve and the cord curve. In some embodiments of this application, at each cord node, the line connecting the node to its adjacent nodes can be calculated to determine the tangent direction, and then the normal direction perpendicular to the tangent direction can be calculated.

[0065] After obtaining the normal direction, the force information of each cord node can be plotted on the coordinate system corresponding to the normal direction to obtain the force curve. Specifically, based on the obtained normal direction, an independent local coordinate system is constructed for each node. The force information is plotted in this local coordinate system in the form of arrows or scale lines, where the length and direction of the arrows represent the magnitude and direction of the force. For example, if the force is positive, indicating tension, the force curve will be plotted above the cord; if the force is negative, indicating compression, the force curve will be plotted below the cord, thus ensuring intuitive visualization of the force curve.

[0066] It should be noted that each point on the stress curve directly corresponds to a node on the cord curve. As the cord curve extends, the stress curve is drawn along this path accordingly. Although the stress curve itself is a projection of the local coordinate system onto the normal direction, its overall trend is consistent with the cord curve, forming an approximately parallel effect.

[0067] Through the above process, the stress curve not only accurately reflects the stress state of each node, but also perfectly combines the stress information with the geometric position of the cord. Engineers can intuitively see how the stress changes as the cord curve extends. This method of drawing stress curves "extending along the direction of the cord curve" provides a more intuitive and accurate visual reference for tire design and performance analysis.

[0068] To make the force curve plotting more accurate, the normal direction between any two adjacent nodes in the cord node can be determined as follows: determine the distance between the coordinates of the first cord node and the second cord node, where the first cord node and the second cord node are any two adjacent nodes in the cord node; determine the first direction component and the second direction component of the unit vector corresponding to the first cord node and the second cord node based on the distance, where the first direction component and the second direction component are used to determine the direction of the line connecting the first cord node and the second cord node; determine the normal direction based on the first direction component and the second direction component.

[0069] Specifically, after obtaining the force and coordinate information of each cord node, the normal direction between two adjacent nodes can be determined based on the coordinate information. For example, the normal direction between two adjacent nodes a and b can be calculated as follows:

[0070]

[0071] dx=(x1-x2) / l

[0072] dy=(y1-y2) / l

[0073] n x =-dy

[0074] n y =dx

[0075] Where node a has coordinates (x1, y1), node b has coordinates (x2, y2), l is the distance between the two nodes, dx is the first direction component, dy is the second direction component, and n... x n is parallel to the normal direction. y It is perpendicular to the normal direction.

[0076] In some embodiments of this application, the scale position information corresponding to each cord node can also be determined, wherein the scale position information is used to reflect the position of the force information relative to the cord curve.

[0077] Scale position information refers to the specific location information used to position the force scale in the normal direction. It combines the magnitude and direction of the force to determine whether the force scale is drawn above, below, or directly on the cord curve. For example, the force information (e.g., tension or compression) of each cord node can be checked. If the force is positive, indicating tension, the scale will be drawn upwards along the normal direction; if the force is negative, indicating compression, the scale will be drawn downwards along the normal direction.

[0078] To ensure that the visualization of the stress curve matches the actual stress situation, the stress curve can be determined as follows: determine the scale length corresponding to the stress information of each cord node, where the scale length is used to reflect the magnitude of the stress on the cord node; determine the target coordinates of the cord node in the normal direction based on the positive and negative values ​​of the stress information and the scale length; connect all the target coordinates to obtain the stress curve.

[0079] Specifically, a scaling factor k can be set to convert the force magnitude into a readable scale length in the graph. That is, the relationship between the scale length L and the force magnitude F is: L=k|F|. Considering that the force may be tension (positive value) or compression (negative value), it is necessary to determine the offset direction of the scale in the normal direction based on the positive or negative value of the force information. For example, if the force is positive, it indicates tension, and the target coordinate is located at the original node coordinate offset upward along the normal direction; if the force is negative, it indicates compression, and the target coordinate is located at the original node coordinate offset downward along the normal direction. The specific offset amount is determined by the scale length in step one.

[0080] In some embodiments of this application, the target coordinates of the cord node can be determined by the following steps: obtaining a set of force information corresponding to multiple third cord nodes; when the force values ​​in the set of force information are all positive, determining the target coordinates along a first direction of the cord curve, wherein the first direction includes the side of the normal direction relative to the center of the tire cross-section away from the centerline of the target tire; when the force values ​​in the set of force information are all negative, determining the target coordinates along a second direction of the cord curve, wherein the second direction includes the side of the normal direction relative to the center of the tire cross-section pointing towards the centerline of the target tire; when the force values ​​in the set of force information include both positive and negative values, fixing the midpoint of the scale on the cord curve, and determining the target coordinates based on the midpoint of the scale, wherein the midpoint of the scale is the dividing point between positive and negative forces.

[0081] Specifically, the third cord node can be a selected portion of continuous cord nodes from all cord nodes, or it can be all cord nodes, depending on the drawing requirements.

[0082] (1) When all force values ​​in the force information set are positive, it indicates that the cord is under tension. At this time, the target coordinates are calculated along the first direction, that is, along the normal direction away from the center of the tire cross section. For example, the corresponding scale length can be calculated according to the force magnitude of each node, and then the position of the target coordinates can be calculated according to the scale length and the unit normal vector.

[0083] (2) When all force values ​​in the force information set are negative, it indicates that the cord is under pressure. In this case, the target coordinates are calculated along the second direction, that is, along the normal direction pointing to the center of the tire cross-section.

[0084] (3) When the force information concentration contains both positive and negative values: This indicates that the cord is under tension in some parts and under pressure in others. In this case, it is necessary to first determine the midpoint of the scale, such as placing it on the cord curve, and then determine the positions of the two ends of the scale according to the sign of the force value. If the force value is positive, the target coordinate calculation is still performed according to the first direction; if the force value is negative, it is performed according to the second direction. Ensure that the position of the midpoint of the scale on the cord curve remains unchanged to maintain the continuity and clarity of the force curve.

[0085] Finally, using all target coordinates, a continuous stress curve is generated through smoothing or curve fitting. This curve is not only visually approximately parallel to the cord curve, but also visually demonstrates the stress distribution along the entire cord through the length and direction of the scale.

[0086] In some embodiments of this application, before determining the force curve corresponding to the force information, the following steps may be performed: determining the target cord node corresponding to the loop-wrapped section of the cord of the target tire, wherein the loop-wrapped section is a loop-shaped structure formed by the cord of the target tire at the edge of the tire body through a loop-wrapping process; and deleting the target force information corresponding to the target cord node from the force information.

[0087] The bezel wrap-around section is a common structural feature in tire manufacturing. Located at the edge of the tire carcass, it forms a ring-shaped structure through a wrap-around process. Its purpose is to increase the strength and stability of the tire edge. In stress analysis, the stress situation in this area is often very complex and difficult to interpret accurately, so special treatment is required.

[0088] Specifically, based on the tire structure design drawings or finite element analysis model, the position of the bezel inversion section in the tire model is determined in advance. Once the bezel inversion section is identified, it is necessary to further determine all cord nodes located within this area, i.e., target cord nodes. For example, by querying the coordinate information of the nodes in the finite element model and comparing it with the preset coordinate range of the bezel inversion section, all cord nodes whose coordinates fall within this range can be found. For all nodes that have been identified as target cord nodes, their force information is removed one by one from the force information set.

[0089] Through the above steps, the stress data of the bezel wrapping section was effectively processed, ensuring that the plotting of the stress curve was more focused on the stress analysis of key areas for tire performance optimization, improving the efficiency of stress information interpretation, and reducing potential interference with design decisions.

[0090] Step S206: Merge the cord curve and the stress curve to obtain the target image.

[0091] In step S206 above, the target image is a comprehensive graphic generated by merging the cord curve and the stress curve. It combines the geometric and mechanical information of the tire structure in a visual way, providing engineers with intuitive cord stress analysis results.

[0092] For example, image processing or graphics drawing software can be used to first load the cord curve diagram representing the geometry of the tire cords, and then load the pre-calculated and drawn stress curve diagram, ensuring that the coordinate systems of the two diagrams are consistent to facilitate subsequent merging operations. Using the alignment function in the image processing software, the stress curve diagram can be precisely superimposed on the cord curve diagram, ensuring that each point on the stress curve perfectly matches the corresponding node on the cord curve in coordinates. Furthermore, by adjusting image transparency or using other image fusion techniques, the two images can be merged into a single target image displaying complete information.

[0093] Through steps S202 to S206 above, a combination of data extraction and graphical mapping is used to obtain the stress information of each cord node and determine the corresponding stress curve. The stress curve extends along the natural and continuous geometric path of the cord on the tire cross-section, making the stress information closely related to the physical position of the cord. This achieves the goal of accurately displaying the stress details of the tire cord, thereby significantly improving the analysis efficiency and the intuitiveness of the results. It also solves the technical problem that the stress analysis results of tire cords in related technologies are difficult to intuitively reflect the stress distribution and changing trend of each cord under actual stress conditions.

[0094] Figure 4 This is a schematic diagram of tire carcass cords and their stress distribution, illustrating a method for processing tire cord stress analysis results according to an embodiment of this application. Figure 4 As shown, the black carcass lines represent the actual geometric layout of the cords in the tire carcass, accurately reflecting the direction and distribution of the cords inside the tire, and are a core component of tire structural design. The gray force curves are drawn directly above or below the black carcass lines, representing the magnitude and direction of the force at each cord node. Different scales indicate the radial cord force (RBFOR(N)) in different areas of the tire carcass, visually reflecting the magnitude of the force and allowing engineers to quickly identify areas with high or low force.

[0095] In some specific embodiments of this application, the stress on the cord can be graphically represented through the following steps:

[0096] Step 1: Based on the two-dimensional material distribution map of the tire, perform mesh generation and establish sets and surfaces.

[0097] Step 2: Define the material constitutive model, cross-sectional properties, mesh type, and inflation pressure of the model, define the inflation analysis step, and perform a two-dimensional inflation simulation of the tire.

[0098] Step 3: Write a program to extract the force on each node of the tire cord during two-dimensional inflation.

[0099] Step 4: Extract the coordinates of each node on the tire cord.

[0100] Step 5: Calculate the normal direction between two adjacent nodes and draw a scaled coordinate on each node.

[0101] Step 6: Plot the force of each node on the coordinates of the normal direction, with the force curve and the cord curve being approximately parallel.

[0102] Step 7: Determine if the force on the cord is greater than zero. If it is greater than zero, draw it above the cord; if it is less than zero, draw it below the cord.

[0103] Step 8: Correctly handle the inverted section of the tire cord. Since the stress on the inverted section is chaotic, it is not within the scope of analysis. Therefore, the program needs to identify the inverted section and delete this part.

[0104] Step 9: Output the cord curve and cord stress curve to the image.

[0105] Through the above steps, the calculated stress information can be directly presented graphically on the geometric curve of the cord, realistically reflecting the stress state of the cord. Compared with traditional methods based on element or node data extraction, this application can more realistically reflect the spatial location and direction of the force, greatly simplifying the analysis process and improving the interpretability of the stress results and the efficiency of engineering applications. It should be noted that this application is not only applicable to the post-processing of tire finite element analysis results, but can also be applied to various engineering calculation scenarios related to cord stress, such as balance profile calculation and tire carcass stress analysis.

[0106] The graphical method for depicting cord stress proposed in this application directly plots the stress on the cord's curve. Compared to traditional methods, this method has the following advantages: First, because the cord is a curve, it is difficult to reflect both the position and the magnitude of the force in a Cartesian coordinate system. However, this application can accurately reflect the magnitude of the force at the precise location. Second, this application can be applied to both the result processing of finite element analysis and the calculation of tire carcass equilibrium profiles, directly calculating the stress distribution of the tire carcass in the early stages. Furthermore, this application can achieve platform-based and automated processing, directly outputting the cord stress diagram to the user, eliminating complex operations.

[0107] Traditional post-processing of stress typically relies on element or node information in a Cartesian coordinate system, displaying results as color maps, vector fields, or scalar diagrams. However, tire cords often exist as curves or complex spatial paths in the tire structure, making it difficult to accurately represent the spatial position and stress conditions of the cords using a purely global coordinate-based display method. This application's embodiment can directly plot the stress results on the cord curves, preserving the true geometric shape of the cords while accurately expressing the magnitude, direction, and distribution of the stress at their geometrical position. In this way, the stress information corresponds one-to-one with the geometric path of the cords, avoiding the distortion caused by coordinate projection or post-processing errors in traditional methods, and improving the intuitiveness and accuracy of the results.

[0108] Furthermore, this application is not only applicable to the post-processing of finite element analysis results, such as the visualization of cord stress, force, or reaction force in structural simulation, but can also be widely applied to pre-processing and simplified calculation scenarios such as tire balance profile calculation and initial tire carcass stress assessment. In the analysis stage, such as balance profile calculation, this method can directly calculate and output the stress distribution of the tire carcass cords, allowing designers to obtain the cord stress trend early on. This provides a strong reference for tire carcass design, avoids design deviations and subsequent development risks, and improves R&D efficiency.

[0109] This application also possesses excellent procedural and modular characteristics, allowing integration with various engineering simulation software or analysis platforms to achieve platform-based and automated force visualization processing. Users do not need to master complex post-processing script writing or data filtering skills; the system can automatically identify the cord layout, extract corresponding force data, generate visualization results, and output graphs or reports, greatly reducing manual operation steps and improving the convenience and universality of engineering applications. Through platform integration, it can achieve automatic analysis and visualization output of large-scale tire design schemes, providing effective support for intelligent design and batch performance evaluation.

[0110] It should be noted that the embodiments of this application can also be combined with balanced profile tire carcass design, drawing the tire carcass stress curve during the design stage to achieve scientific tire design. Furthermore, based on the obtained cord breaking force, the breaking force can be divided by the actual cord stress to obtain the safety multiple curve of the tire cord at the actual location. This application can be extended to rubber units, such as outputting the strain values ​​of a series of units on the tire sidewall, plotting the strain values ​​directly on the units, and providing intuitive result analysis.

[0111] Figure 5 This is a structural diagram of a device for processing the stress analysis results of tire cords according to an embodiment of this application, as shown below. Figure 5 As shown, the device includes:

[0112] The acquisition module 502 is used to acquire the inflation simulation results of the target tire. The inflation simulation results are used to reflect the force information of each cord node of the target tire cord. The cord node is the smallest calculation unit that constitutes the geometry of the cord.

[0113] The determination module 504 is used to determine the force curve corresponding to the force information, wherein the force curve extends along the direction of the cord curve, and the cord curve is a continuous geometric curve of the cord on the cross section of the target tire.

[0114] The merging module 506 is used to merge the cord curve and the stress curve to obtain the target image.

[0115] It should be noted that, Figure 5The device shown is used to process the stress analysis results of the tire cords. Figure 2 The method for processing the stress analysis results of the tire cords shown is therefore... Figure 2 The explanations and instructions regarding the processing methods for tire cord stress analysis results also apply to... Figure 5 The device for processing the stress analysis results of the tire cords shown is not described in detail here.

[0116] This application also provides an electronic device, which includes a memory and a processor. The memory is used to store program instructions, and the processor is connected to the memory to execute the steps of the processing method for implementing the tire cord stress analysis results in various embodiments of this application.

[0117] This application also provides a non-volatile storage medium, which includes a stored computer program, wherein the device containing the non-volatile storage medium executes the steps of the tire cord stress analysis result processing method in various embodiments of this application by running the computer program.

[0118] This application also provides a computer program product, including computer instructions, which, when executed by a processor, implement the steps of the processing method for the tire cord stress analysis results in various embodiments of this application.

[0119] This application also provides a computer program that, when executed by a processor, implements the steps of the method for processing the stress analysis results of tire cords in various embodiments of this application.

[0120] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0121] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0122] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0123] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0124] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0125] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0126] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for processing the stress analysis results of tire cords, characterized in that, include: Obtain the inflation simulation results of the target tire, wherein the inflation simulation results are used to reflect the force information of each cord node of the target tire cord, and the cord node is the smallest calculation unit that constitutes the geometry of the cord; Determine the force curve corresponding to the force information, wherein the force curve extends along the direction of the cord curve, and the cord curve is a continuous geometric curve of the cord on the cross-section of the target tire; The target image is obtained by merging the cord curve and the stress curve.

2. The method according to claim 1, characterized in that, Determining the force curve corresponding to the force information includes: The force and coordinate information of each cord node are obtained from the inflation simulation results; The normal direction between any two adjacent nodes in the cord node is determined based on the coordinate information, wherein the normal direction is used to represent the direction perpendicular to the cord curve at each cord node; The stress information of each cord node is plotted on the coordinate system corresponding to the normal direction to obtain the stress curve.

3. The method according to claim 2, characterized in that, Determining the normal direction between any two adjacent nodes in the cord node based on the coordinate information includes: Determine the distance between the coordinate information of the first curtain node and the coordinate information of the second curtain node, wherein the first curtain node and the second curtain node are any two adjacent nodes among the curtain nodes; Based on the distance, a first direction component and a second direction component of the unit vector corresponding to the first cord node and the second cord node are determined, wherein the first direction component and the second direction component are used to determine the direction of the line connecting the first cord node and the second cord node; The normal direction is determined based on the first direction component and the second direction component.

4. The method according to claim 2, characterized in that, The method further includes: Determine the scale position information corresponding to each of the cord nodes, wherein the scale position information is used to reflect the position of the force information relative to the cord curve.

5. The method according to claim 4, characterized in that, The stress information of each cord node is plotted on the coordinate system corresponding to the normal direction to obtain the stress curve, including: Determine the scale length corresponding to the force information of each cord node, wherein the scale length is used to reflect the magnitude of the force on the cord node; In the normal direction, the target coordinates of the cord node are determined based on the positive and negative values ​​corresponding to the force information and the scale length; Connect all the target coordinates to obtain the force curve.

6. The method according to claim 5, characterized in that, Determining the target coordinates of the cord node in the normal direction based on the positive and negative values ​​of the force information and the scale length includes: Obtain the force information set corresponding to multiple third cord nodes; When all force values ​​in the force information set are positive, the target coordinates are determined in a first direction along the cord curve, wherein the first direction includes the side of the normal direction away from the centerline of the target tire relative to the center of the tire cross section. When all the force values ​​in the force information set are negative, the target coordinates are determined in a second direction along the cord curve, wherein the second direction includes the side of the normal direction relative to the center line of the tire cross section pointing to the center line of the target tire; When the force values ​​in the force information set include both positive and negative values, the midpoint of the scale is fixed on the curve of the cord, and the target coordinates are determined based on the midpoint of the scale, wherein the midpoint of the scale is the dividing point between positive and negative forces.

7. The method according to claim 1, characterized in that, Before determining the force curve corresponding to the force information, the method further includes: Determine the target cord node corresponding to the looped section of the cord of the target tire, wherein the looped section is a loop-shaped structure formed by the cord of the target tire at the edge of the tire body through a looping process; The target force information corresponding to the target cord node is deleted from the force information.

8. A device for processing the stress analysis results of tire cords, characterized in that, include: The acquisition module is used to acquire the inflation simulation results of the target tire, wherein the inflation simulation results are used to reflect the force information of each cord node of the target tire cord, and the cord node is the smallest calculation unit that constitutes the geometry of the cord; The determination module is used to determine the force curve corresponding to the force information, wherein the force curve extends along the direction of the cord curve, and the cord curve is a continuous geometric curve of the cord on the cross section of the target tire. The merging module is used to merge the cord curve and the stress curve to obtain the target image.

9. An electronic device, characterized in that, include: A memory and a processor, wherein the memory is used to store program instructions; the processor is connected to the memory and is used to execute a processing method for implementing the stress analysis results of tire cords according to any one of claims 1 to 7.

10. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored computer program, wherein the device containing the non-volatile storage medium executes the method for processing the tire cord stress analysis results as described in any one of claims 1 to 7 by running the computer program.

11. A computer program product comprising computer instructions, characterized in that, When the computer instructions are executed by the processor, they implement the method for processing the stress analysis results of tire cords as described in any one of claims 1 to 7.

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