Method and device for simulating a tire belt cord

Abstract

The application discloses a simulation method and device for a tire belt cord. The method comprises the following steps: acquiring unit node coordinates of a plurality of cord units in a tire belt cord two-dimensional grid model; determining center coordinates of the plurality of cord units according to the unit node coordinates of the plurality of cord units respectively, and determining a plurality of target distances between the centers of the plurality of cord units and a symmetry point of the tire belt cord two-dimensional grid model respectively, wherein the center coordinates are used to indicate positions corresponding to the centers of the cord units; sequentially substituting the plurality of target distances into a preset determined fitting function to determine belt angles of the plurality of cord units, wherein the fitting function is used to represent a relationship between the target distances and the belt angles of the cord units; and writing the plurality of cord units with the determined belt angles and material properties corresponding to the plurality of cord units with the determined belt angles into a simulation file, so as to complete the simulation of the tire belt cord.

Description

Technical Field

[0001] This application relates to the field of tire simulation technology, and more specifically, to a simulation method and apparatus for tire belt layer cords. Background Technology

[0002] Tires are a core component of automobiles, playing a vital role in load bearing, braking, and cushioning during vehicle operation. The belt layer cords are an important part of radial tires, playing a crucial role in securing the tire carcass, bearing circumferential tensile forces, and improving tire stability during rolling. The manufacturing stability of the belt layer components has a critical impact on tire performance and safety.

[0003] However, during tire manufacturing, the belt layer expands due to the inflation of the molding drum and vulcanization, causing a gradual change in the belt layer angle that does not match the cutting angle of the cords. This change in belt layer angle caused by the manufacturing process directly affects the tire's markings, thus impacting various aspects of tire performance. Currently, finite element simulations of tires assume a fixed belt layer angle, failing to consider the influence of the manufacturing process on the finished tire's belt layer angle. This leads to discrepancies between the finite element simulation results and the experimental results of the finished tire. Summary of the Invention

[0004] This application provides a simulation method and apparatus for tire belt layer cords, which at least solves the technical problem of low accuracy of simulation results caused by using a default fixed belt layer angle value during the simulation of the belt layer in the tire.

[0005] According to one aspect of the embodiments of this application, a simulation method for tire belt layer cords is provided, comprising: obtaining the unit node coordinates of a plurality of cord units in a two-dimensional mesh model of tire belt layer cords; determining the center coordinates of the plurality of cord units respectively based on the unit node coordinates of the plurality of cord units, and determining a plurality of target distances between the center of the plurality of cord units and a symmetrical point of the two-dimensional mesh model of the belt layer cords, wherein the center coordinates are used to indicate the position corresponding to the center of the cord unit; sequentially substituting the plurality of target distances into a preset fitting function to determine the belt layer angle of the plurality of cord units, wherein the fitting function is used to represent the relationship between the target distances and the belt layer angle of the cord units; and writing the plurality of cord units with determined belt layer angles and the corresponding material properties of the plurality of cord units with determined belt layer angles into a simulation file to complete the simulation of the tire belt layer cords.

[0006] Optionally, the fitting function is determined by: acquiring a tire cross-section belt layer image; identifying the distribution area of ​​the belt layer cords from the belt layer image, defining the transverse centerline and longitudinal centerline of the distribution area as a first transverse axis and a first longitudinal axis, wherein the first transverse axis and the first longitudinal axis are the transverse axis and the longitudinal axis of a first coordinate system of the plane where the distribution area is located; sequentially determining multiple first distances between multiple target cords on the left and right sides of the first longitudinal axis and the first longitudinal axis, and multiple first angles between the target cords and the first transverse axis; and determining the fitting function based on the multiple first distances and the multiple first angles.

[0007] Optionally, determining the fitting function based on the plurality of first distances and the plurality of first included angles includes: determining the complementary angle of each of the plurality of first included angles as a second included angle, and determining the second included angle corresponding to each first distance; using the least squares method to fit the plurality of first distances and the second included angles corresponding to the plurality of first distances to obtain a relationship curve representing the angle of the belt layer cord and the second distance, wherein the second distance is used to represent the distance of the cord to the first vertical axis; and determining the fitting function based on the relationship curve.

[0008] Optionally, the target cord is determined by the following method: determining the fourth cord on the left side of the first vertical axis as the first target cord on the left, and determining multiple target cords on the left side by skipping three cords from the first cord on the left until the left boundary of the distribution area; determining the fourth cord on the right side of the first vertical axis as the first target cord on the right, and determining multiple target cords on the right side by skipping three cords from the first cord on the right until the right boundary of the distribution area; and determining the target cord on the left and the target cord on the right as the target cord.

[0009] Optionally, determining the center coordinates of the plurality of cord units based on the unit node coordinates of the plurality of cord units includes: determining the axis of symmetry of the two-dimensional mesh model of the tire belt layer cord as the second horizontal axis, and determining the symmetry point of the two-dimensional mesh model of the tire belt layer cord as the origin, so as to establish a second coordinate system on the plane where the two-dimensional mesh model of the tire belt layer cord is located; determining the coordinates of the plurality of cord unit nodes in the second coordinate system, and determining the center coordinates of the plurality of cord units based on the coordinates of the plurality of cord unit nodes.

[0010] Optionally, determining the target distances between the centers of the plurality of cord units and the symmetrical points of the two-dimensional mesh model of the belt layer cord includes: determining the square of the difference between the abscissa of the center of the cord unit and the abscissa of the symmetrical point as a first value; determining the square of the difference between the abscissa of the center of the cord unit and the abscissa of the symmetrical point as a second value; and determining the square root of the sum of the squares of the first value and the second value as the target distance.

[0011] Optionally, determining the center coordinates of the plurality of cord unit nodes based on their coordinates includes: determining the average of the abscissas of the cord units as the abscissa of the center coordinates; and determining the average of the ordinates of the cord units as the ordinate of the center coordinates.

[0012] According to another aspect of the embodiments of this application, a simulation system for tire belt layer cords is also provided, applied to a simulation method for tire belt layer cords, comprising: an image acquisition device and a computer device, wherein the image acquisition device is connected to the computer device; the image acquisition device is used to acquire tire cross-sectional belt layer images; the computer device is used to receive the tire cross-sectional belt layer images and identify the distribution area of ​​the belt layer cords from the belt layer images to determine a fitting function; and to execute the above-described simulation method for tire belt layer cords.

[0013] According to another aspect of the embodiments of this application, a simulation device for tire belt layer cords is also provided, comprising: an acquisition module, configured to acquire the unit node coordinates of a plurality of cord units in a two-dimensional mesh model of tire belt layer cords; a first determination module, configured to determine the center coordinates of the plurality of cord units respectively based on the unit node coordinates of the plurality of cord units, and to determine a plurality of target distances between the center of the plurality of cord units and a symmetrical point of the two-dimensional mesh model of the belt layer cords; a second determination module, configured to sequentially substitute the plurality of target distances into a preset and determined fitting function to determine the belt layer angle of the plurality of cord units, wherein the fitting function is used to represent the relationship between the target distances and the belt layer angle of the cord units; and a simulation module, configured to write the plurality of cord units with determined belt layer angles and the corresponding material properties of the plurality of cord units with determined belt layer angles into a simulation file to complete the simulation of the tire belt layer cords.

[0014] According to another aspect of the embodiments of this application, an electronic device is also provided, including: a memory and a processor, the processor being configured to run a program stored in the memory, wherein the program, when running, executes the above-described simulation method for tire belt layer cords.

[0015] 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 program, wherein, when the program is executed, the device where the non-volatile storage medium is located is controlled to perform the above-described simulation method for tire belt layer cords.

[0016] In this embodiment, the method involves obtaining the node coordinates of multiple cord units in a two-dimensional mesh model of tire belt layer cords; determining the center coordinates of the multiple cord units based on their node coordinates, and determining multiple target distances between the centers of the multiple cord units and symmetrical points of the two-dimensional mesh model of the belt layer cords, where the center coordinates indicate the position corresponding to the center of the cord unit; substituting the multiple target distances sequentially into a preset fitting function to determine the belt layer angles of the multiple cord units, where the fitting function represents the relationship between the target distances and the belt layer angles of the cord units; and then determining the multiple belt layer angles. The material properties corresponding to the cord units with defined angles and the multiple cord units with defined belt layer angles are written into the simulation file to complete the simulation of the tire belt layer cords. By determining multiple target distances between the centers of multiple cord units and the symmetrical points of the two-dimensional mesh model of the belt layer cords, and substituting these target distances into a pre-determined fitting function, the belt layer angle of each cord unit is obtained. This achieves the goal of accurately determining the belt layer angle of each cord unit, thereby improving the accuracy of the simulation results. This also solves the technical problem of low accuracy in simulation results caused by using a default fixed belt layer angle value during the simulation of the belt layer in the tire. 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 (or mobile device) for a simulation method of tire belt layer cord according to an embodiment of this application.

[0019] Figure 2 This is a flowchart illustrating a simulation method for tire belt layer cords according to this application;

[0020] Figure 3 This is an optional tire cross-section schematic diagram according to an embodiment of this application;

[0021] Figure 4 This is an optional front view of a tire cross-section according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of an optional tire cross-section cut according to an embodiment of this application;

[0023] Figure 6 This is a frontal view of an optional tire cross-section after dissection, according to an embodiment of this application.

[0024] Figure 7 This is an optional tire cross-section belt layer image according to an embodiment of this application;

[0025] Figure 8 This is an identification image of an optional bundled layer cord according to an embodiment of this application;

[0026] Figure 9 This is a schematic diagram comparing the relationship curve between the actual angle and the second distance of an optional belt layer cord according to an embodiment of this application and the relationship curve between the design angle and the second distance of the belt layer cord;

[0027] Figure 10 This is a schematic diagram of an optional two-dimensional mesh model of tire belt layer cord according to an embodiment of this application;

[0028] Figure 11 This is a schematic diagram of a simulation system structure for an optional tire belt layer cord according to an embodiment of this application;

[0029] Figure 12 This is a schematic diagram of an optional image acquisition device according to an embodiment of this application;

[0030] Figure 13 This is a schematic diagram of a simulation device structure for an optional tire belt layer cord according to an embodiment of this application;

[0031] The above figures include the following reference numerals:

[0032] 1. Base; 2. Base plate; 3. Optical camera; 4. Support column; 5. Light-transmitting plate; 6. Baffle; 7. Supporting side wall; 8. Lighting element; 9. Cross-section of the dissected tire. Detailed Implementation

[0033] 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 skilled in the art without creative effort should fall within the scope of protection of the present application.

[0034] 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.

[0035] According to an embodiment of this application, an embodiment of a simulation method for tire belt layer cord is also provided. 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.

[0036] The method embodiments 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 (or mobile device) for implementing a simulation method for tire belt layer cords is shown. Figure 1 As shown, the computer terminal 10 (or mobile device 10) may include one or more processors 102 (shown as 102a, 102b, ..., 102n in the figure) 102 (processor 102 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. In addition, it may also include: a display, 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, a power supply, and / or a camera. 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 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0037] It should be noted that the aforementioned one or more processors 102 and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be integrated, in whole or in part, into any other element within the computer terminal 10 (or mobile device). As involved in the embodiments of this application, the data processing circuits serve as a processor control mechanism (e.g., selection of a variable resistor termination path connected to an interface).

[0038] The memory 104 can be used to store software programs and modules for application software, such as the program instructions / data storage device corresponding to the simulation method of tire belt layer cord in this embodiment. The processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, thereby realizing the above-mentioned simulation method of tire belt layer cord. 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 102, 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.

[0039] 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.

[0040] The display can be, for example, a touchscreen liquid crystal display (LCD) that allows the user to interact with the user interface of the computer terminal 10 (or mobile device).

[0041] According to an embodiment of this application, an embodiment of an integrated braking control system fault information output method is provided. 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 of a simulation method for tire belt layer cords according to an embodiment of this application, such as... Figure 2 As shown, the method includes the following steps:

[0043] Step S202: Obtain the coordinates of the unit nodes of multiple cord elements in the two-dimensional mesh model of the tire belt layer cord;

[0044] Step S204: Determine the center coordinates of multiple cord units based on the unit node coordinates of multiple cord units, and determine multiple target distances between the center of multiple cord units and the symmetrical points of the two-dimensional mesh model of the belt layer cord. The center coordinates are used to indicate the position corresponding to the center of the cord unit.

[0045] Step S206: Substitute multiple target distances into a preset fitting function to determine the belt layer angle of multiple cord units. The fitting function is used to represent the relationship between the target distance and the belt layer angle of the cord unit.

[0046] Step S208: Write the material properties corresponding to the multiple cord units with determined belt layer angles and the multiple cord units with determined belt layer angles into the simulation file to complete the simulation of the tire belt layer cord.

[0047] Through the above steps, multiple target distances between the centers of multiple cord units and the symmetrical points of the two-dimensional mesh model of the belt layer cord can be determined. These target distances are then substituted into a pre-determined fitting function to obtain the belt layer angle of each cord unit. This achieves the goal of accurately determining the belt layer angle of each cord unit, thereby improving the accuracy of the simulation results. Furthermore, it solves the technical problem of low simulation accuracy caused by using a default fixed belt layer angle value during the simulation of the belt layer in the tire.

[0048] It's important to note that the tire belt layer cord is an integral part of the tire's internal structure. It is typically composed of multiple steel wires wound together to enhance the tire's structural strength and stability. The belt layer cord's function is to bear vehicle loads and resist tire deformation, allowing the tire to maintain its shape and stability. The belt layer cord is usually located between the tire tread and sidewall, connected to the tire carcass, and together they form the tire's skeleton. The cord material is often high-strength steel wire, possessing high tensile strength and tensile strength. The design and arrangement of the tire belt layer cord can significantly impact tire performance and lifespan.

[0049] Steps S202 to S208 are described in detail below through examples.

[0050] In some embodiments of this application, the fitting function is determined as follows: acquiring a tire cross-section belt layer image; identifying the distribution area of ​​the belt layer cords from the belt layer image, and determining the transverse centerline and longitudinal centerline of the distribution area as a first transverse axis and a first longitudinal axis, wherein the first transverse axis and the first longitudinal axis are the transverse axis and the longitudinal axis of a first coordinate system of the plane where the distribution area is located; sequentially determining a plurality of first distances between a plurality of target cords on the left and right sides of the first longitudinal axis and the first longitudinal axis, and a plurality of first angles between the target cords and the first transverse axis; and determining the fitting function based on the plurality of first distances and the plurality of first angles.

[0051] In practical applications, it is necessary to cut a section of the tire from the finished tire, such as... Figure 3 As shown. The cut tire cross-section should be flat, with no obvious damage to the cords, and the cord direction should be clear and the boundaries distinct, such as... Figure 4 As shown, this ensures that the angle of the belt layer cord is not affected during the section cutting process.

[0052] Before using an optical camera to photograph the tire cross-section belt layer to obtain an image, the cross-section needs to be dissected and polished using knives, pliers, and electric equipment to fully expose the belt layer cords. Figure 5 and Figure 6 As shown. Tire cross-section analysis is a common method used in the tire industry for studying and analyzing tire structure, and this method will not elaborate on this process.

[0053] Images of the tire cross-section belt layers obtained through an optical camera device, such as... Figure 7 As shown, the belt layer cords are metallic white, arranged in a specific angular order, while the rubber compound is black, creating a striking color contrast with the cords. Image recognition methods can be used to identify and process the tire cross-section belt layer image, obtaining an identified image of the belt layer cord distribution area, such as... Figure 8 As shown. Based on the boundaries of the distribution area of ​​the belt layer cord in the identified image, centerlines are determined in the horizontal and vertical directions, respectively, which are the first horizontal axis and the first vertical axis.

[0054] In one alternative approach, the target cord is determined by: determining the fourth cord on the left side of the first vertical axis as the first target cord on the left, and determining multiple target cords on the left side by skipping three cords from the first cord on the left until the left boundary of the distribution area; determining the fourth cord on the right side of the first vertical axis as the first target cord on the right, and determining multiple target cords on the right side by skipping three cords from the first cord on the right until the right boundary of the distribution area; and determining the target cords on the left and the target cords on the right as the target cords.

[0055] by Figure 8 Taking the identification image of the bundled layer cord as an example, a first coordinate system is established in the identification image. Along the first horizontal axis from the first vertical axis, the distance and angle of every three bundled layer cords to the center line are recorded. For example: to the left, the distance of the first cord to the first vertical axis is recorded as L1, and the angle of the first cord to the first horizontal axis is β1; to the left, the distance of the second cord to the first vertical axis is recorded as L2, and the angle of the second cord to the first horizontal axis is β2; to the right, the distance of the first cord to the first vertical axis is recorded as L3, and the angle of the first cord to the first horizontal axis is β3; to the right, the distance of the second cord to the first vertical axis is recorded as L4, and the angle of the second cord to the first horizontal axis is β4… and so on, until the boundaries of the distribution area are recorded.

[0056] In one optional approach, the specific steps for determining the fitting function based on the plurality of first distances and the plurality of first included angles are as follows: determining the complementary angle of each of the plurality of first included angles as a second included angle, and determining the second included angle corresponding to each first distance; using the least squares method to fit the plurality of first distances and the second included angles corresponding to the plurality of first distances to obtain a relationship curve representing the angle of the belt layer cord and the second distance, wherein the second distance is used to represent the distance of the cord to the first vertical axis; and determining the fitting function based on the relationship curve.

[0057] It should be noted that the second included angle is the angle of the belt layer cord.

[0058] There are several ways to select the target cord. In one possible method, the target cord can be all the cords in the cord distribution area.

[0059] It should also be noted that the angle of the belt layer cords is a fixed value at the beginning of the tire structure design. However, due to the effects of molding and vulcanization during the tire manufacturing process, the design angle of the belt layer cords changes.

[0060] Figure 9 A schematic diagram comparing the relationship curve between the actual angle of the belt layer cord and the second distance with the relationship curve between the design angle of the belt layer cord and the second distance is shown.

[0061] The fitting function is shown in the following equation:

[0062]

[0063] In the formula, y represents the angle of the tire belt layer cord, x represents the distance of the belt layer cord from the first longitudinal axis, and a i These are the constant coefficients in polynomial fitting, and i represents the order of the polynomial.

[0064] It should be noted that the degree of a varies with the polynomial order.i They are different.

[0065] Optionally, the finite element simulation of the tire belt layer cord can use the Rebar model (a modeling method) to establish a symmetric two-dimensional mesh model of the belt layer cord (tire belt layer cord two-dimensional mesh model) in ABAQUS (a general-purpose finite element analysis software for simulating and analyzing complex engineering problems).

[0066] An optional method for determining the center coordinates of the multiple cord units based on the unit node coordinates is as follows: The axis of symmetry of the two-dimensional mesh model of the tire belt layer cord is determined as the second horizontal axis, and the point of symmetry of the two-dimensional mesh model of the tire belt layer cord is determined as the origin, to establish a second coordinate system on the plane where the two-dimensional mesh model of the tire belt layer cord is located; the coordinates of the multiple cord unit nodes are determined in the second coordinate system, and the center coordinates of the multiple cord units are determined based on the coordinates of the multiple cord unit nodes.

[0067] Figure 10 A schematic diagram of a two-dimensional mesh model of tire belt layer cords is shown, as follows. Figure 10 As shown, the model software interface displays a cord unit with unit number E1, whose unit nodes are N0 and N1, and whose coordinates in the second coordinate system are N0(a, 0) and N1(x1, y1), respectively. N0 is the symmetrical point of the belt layer cord, located on the second horizontal axis of the second coordinate system. The center coordinates of multiple cord units can be determined by: using the average of the horizontal coordinates of the cord units as the horizontal coordinate of the center; and using the average of the vertical coordinates of the cord units as the vertical coordinate of the center. Multiple target distances between the centers of the multiple cord units and the symmetrical points of the belt layer cord 2D mesh model can be determined by: using the square of the difference between the horizontal coordinate of the cord unit's center and the horizontal coordinate of the symmetrical point as a first value; using the square of the difference between the horizontal coordinate of the cord unit's center and the horizontal coordinate of the symmetrical point as a second value; and using the square root of the sum of the squares of the first and second values ​​as the target distance.

[0068] by Figure 10 For example, the center coordinate of the cord unit E1 is S1. Given the center coordinates between unit nodes N0 and N1, determine the distance between the center coordinates S1 of cord unit E1 and the symmetrical point.

[0069] Understandably, in the two-dimensional mesh model of tire belt layer cords, the cord element is used to represent the cords in the tire belt layer, and the distance between the center coordinate of the cord element and its symmetrical point is used to represent the distance of the belt layer cord from the first vertical axis. The belt layer angle of the cord element is used to represent the angle of the belt layer cord in the two-dimensional mesh model of tire belt layer cords.

[0070] Substituting M1 into the fitting function yields the belt layer angle α1 of cord unit E1. This process can be repeated to determine the belt layer angles of all cord units.

[0071] In practical applications, Python programs can be used to write the material properties of the corresponding belt layer cord units and cord units into a simulation file, such as an INP file. This allows for the simulation of tire belt layers.

[0072] It should be noted that a Python program can be used to read the numbers of the two-dimensional mesh cells (curtain cells) with bundled layers of cord in the simulation file, as well as their corresponding cell node numbers and coordinates.

[0073] Table 1 shows the comparison results of tire imprints between the tire simulation model and the finished physical tire, with the tire belt cord angles fixed and determined according to the method provided in this application.

[0074]

[0075]

[0076] Table 1

[0077] The simulation method for tire belt layer cords provided in this application employs tire cross-section cutting and analysis to fully and clearly expose the belt layer on the tire cross-section. The distribution of the tire belt layer angles is obtained through optical imaging and image recognition, and the distribution law of the belt layer angles is fitted using mathematical methods. The Rebar elements and node coordinates of the tire model cords in ABAQUS are identified using a Python program. The distances between all cord elements and the axis of symmetry are calculated, and these distances are substituted into the fitting formula to obtain the belt layer angles of all cord elements, which are then written into the INP (Input Line Point). Comparison of simulation results and experimental results verifies the feasibility and accuracy of measuring the belt layer angles of finished tires, demonstrating that this method can improve the accuracy of tire simulation.

[0078] This application also provides a simulation system for tire belt layer cords and a simulation method for tire belt layer cords, such as... Figure 11As shown, it includes: an image acquisition device 110 and a computer device 112, wherein the image acquisition device 110 is connected to the computer device 112; the image acquisition device 110 is used to acquire tire cross-section belt layer images; the computer device 112 is used to receive the tire cross-section belt layer images, identify the distribution area of ​​the belt layer cords from the belt layer images to determine the fitting function; and to perform the above-described simulation method for tire belt layer cords.

[0079] In some embodiments of this application, the image acquisition device 110 can be an optical camera device, such as... Figure 12 As shown, the device includes a base 1, which provides support throughout. A base plate 2 is connected above it, and two optical camera lenses 3 are mounted on the base plate 2 for photographing the distribution of the belt layer cords. Four support columns 4 support a light-transmitting plate 5, which holds the tire cross-section 9 to be photographed. Two baffles 6 are also installed on the light-transmitting plate 5 to prevent objects from slipping during photography. The light-transmitting plate 5 is made of transparent plexiglass, allowing light to pass through during imaging. Supporting sidewalls 7 are connected to the base plate, and lighting elements 8 are mounted above them. The dissected tire cross-section 9 is not part of the optical imaging device's structure. When using the optical imaging device to photograph the tire cross-section belt layer cords, the following procedures should be followed... Figure 12 As shown, the belt layer on the tire cross section is placed flat against the light-transmitting plate.

[0080] This application also provides a simulation device for tire belt layer cords, such as Figure 13 As shown, the system includes: an acquisition module 50, used to acquire the coordinates of the unit nodes of multiple cord units in a two-dimensional mesh model of the tire belt layer cord; a first determination module 52, used to determine the center coordinates of the multiple cord units based on their unit node coordinates, and to determine multiple target distances between the centers of the multiple cord units and the symmetrical points of the two-dimensional mesh model of the belt layer cord; a second determination module 54, used to sequentially substitute the multiple target distances into a preset fitting function to determine the belt layer angle of the multiple cord units, wherein the fitting function represents the relationship between the target distances and the belt layer angle of the cord units; and a simulation module 56, used to write the material properties corresponding to the multiple cord units with determined belt layer angles and the multiple cord units with determined belt layer angles into a simulation file to complete the simulation of the tire belt layer cord.

[0081] The second determining module 54, the fitting submodule, is used to acquire a tire cross-section belt layer image; identify the distribution area of ​​the belt layer cords from the belt layer image, and determine the transverse centerline and longitudinal centerline of the distribution area as the first horizontal axis and the first vertical axis, which are the horizontal axis and the vertical axis of the first coordinate system of the plane where the distribution area is located; sequentially determine multiple first distances between multiple target cords on the left and right sides of the first vertical axis and the first vertical axis, and multiple first angles between the target cords and the first horizontal axis; and determine the fitting function based on the multiple first distances and the multiple first angles.

[0082] The fitting submodule includes a fitting unit and a determination unit. The fitting unit is used to determine the complementary angle of the plurality of first included angles as second included angles, and to determine the second included angle corresponding to each first distance. The least squares method is used to fit the plurality of first distances and the second included angles corresponding to the plurality of first distances to obtain a relationship curve representing the angle of the belt layer cord and the second distance, wherein the second distance is used to represent the distance of the cord to the first vertical axis. The fitting function is determined according to the relationship curve.

[0083] The determining unit is configured to determine the fourth cord on the left side of the first vertical axis as the first target cord on the left, and to determine multiple target cords on the left side by skipping three cords from the first cord on the left until the left boundary of the distribution area; to determine the fourth cord on the right side of the first vertical axis as the first target cord on the right, and to determine multiple target cords on the right side by skipping three cords from the first cord on the right until the right boundary of the distribution area; and to determine the target cords on the left and the target cords on the right as the target cords.

[0084] The first determining module 52 includes a coordinate submodule and a distance submodule. The coordinate submodule is used to determine the axis of symmetry of the two-dimensional mesh model of the tire belt layer cord as the second horizontal axis and to determine the symmetry point of the two-dimensional mesh model of the tire belt layer cord as the origin, so as to establish a second coordinate system on the plane where the two-dimensional mesh model of the tire belt layer cord is located; in the second coordinate system, the coordinates of the plurality of cord unit nodes are determined, and the center coordinates of the plurality of cord units are determined based on the coordinates of the plurality of cord unit nodes.

[0085] The distance submodule is used to determine the square of the difference between the center abscissa of the cord unit and the abscissa of the symmetrical point as a first value; to determine the square of the difference between the center abscissa of the cord unit and the abscissa of the symmetrical point as a second value; and to determine the square root of the sum of the squares of the first value and the second value as the target distance.

[0086] The coordinate submodule includes: a coordinate unit, which is used to determine the average value of the horizontal coordinates corresponding to the cord unit as the horizontal coordinate of the center coordinate; and to determine the average value of the vertical coordinates corresponding to the cord unit as the vertical coordinate of the center coordinate.

[0087] According to another aspect of the embodiments of this application, a non-volatile storage medium is also provided, including a stored program, wherein, when the program is running, the device where the non-volatile storage medium is located is controlled to execute the above-mentioned simulation method for tire belt layer cords.

[0088] According to another aspect of the embodiments of this application, an electronic device is also provided, including a memory, a processor, and an integrated brake control system fault information output method program stored in the memory and executable on the processor. When the processor executes the program, it implements the above-mentioned simulation method for tire belt layer cords.

[0089] 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.

[0090] 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.

[0091] 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 example, 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 couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0092] The units described as separate components may or may not be physically separate. Similarly, the components shown as units may or may not be physical units; 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, depending on actual needs.

[0093] 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.

[0094] 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 of 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.

[0095] The above are merely preferred embodiments 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 principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A simulation method for tire belt layer cords, characterized in that, include: Obtain the coordinates of the unit nodes of multiple cord elements in the two-dimensional mesh model of the tire belt layer cord; The center coordinates of the plurality of cord units are determined based on the unit node coordinates of the plurality of cord units, and the target distances between the center of the plurality of cord units and the symmetrical points of the two-dimensional mesh model of the belt layer cord are determined. The center coordinates are used to indicate the position corresponding to the center of the cord unit. The multiple target distances are sequentially substituted into a preset fitting function to determine the belt layer angle of the multiple cord units. The fitting function is used to represent the relationship between the target distance and the belt layer angle of the cord unit. Multiple cord units with defined belt layer angles and their corresponding material properties are written into a simulation file to complete the simulation of the tire belt layer cord. The fitting function is determined by the following methods: acquiring a tire cross-sectional belt layer image; identifying the distribution area of ​​the belt layer cord from the belt layer image, and determining the transverse and longitudinal centerlines of the distribution area as the first horizontal axis and the first vertical axis, which are the horizontal and vertical axes of the first coordinate system of the plane where the distribution area is located; sequentially determining multiple first distances between multiple target cords on the left and right sides of the first vertical axis and the first vertical axis, and multiple first angles between the target cords and the first horizontal axis; determining the fitting function based on the multiple first distances and the multiple first angles; determining the center coordinates of the multiple cord units based on the unit node coordinates of the multiple cord units includes: determining the axis of symmetry of the two-dimensional mesh model of the tire belt layer cord as the second horizontal axis, and determining the tire belt layer... The origin is the symmetry point of the two-dimensional mesh model of the tire cord layer, establishing a second coordinate system on the plane where the two-dimensional mesh model of the tire cord layer is located. The coordinates of the plurality of cord unit nodes are determined in the second coordinate system, and the center coordinates of the plurality of cord units are determined based on the coordinates of the plurality of cord unit nodes. Determining multiple target distances between the centers of the plurality of cord units and the symmetry point of the two-dimensional mesh model of the tire cord layer includes: determining the square of the difference between the x-coordinate of the center of the cord unit and the x-coordinate of the symmetry point as a first value; determining the square of the difference between the y-coordinate of the center of the cord unit and the y-coordinate of the symmetry point as a second value; and determining the square root of the sum of the squares of the first and second values ​​as the target distance. Determining the center coordinates of the plurality of cord units based on the coordinates of the plurality of cord unit nodes includes: determining the average of the x-coordinates corresponding to the cord units as the x-coordinate of the center coordinates; and determining the average of the y-coordinates corresponding to the cord units as the y-coordinate of the center coordinates.

2. The method according to claim 1, characterized in that, Determining the fitting function based on the plurality of first distances and the plurality of first included angles includes: The complementary angles of the plurality of first included angles are respectively determined as second included angles, and the second included angles corresponding to each first distance are respectively determined; The least squares method is used to fit the plurality of first distances and the second included angles corresponding to the plurality of first distances to obtain a curve representing the relationship between the angle of the belt layer cord and the second distance, wherein the second distance is used to represent the distance of the cord to the first vertical axis; The fitting function is determined based on the relationship curve.

3. The method according to claim 1, characterized in that, The target cord is determined by the following methods: The fourth cord on the left side of the first vertical axis is determined as the first target cord on the left side, and multiple target cords on the left side are determined sequentially at intervals of three cords from the first cord on the left side until the left boundary of the distribution area. The fourth cord to the right of the first vertical axis is determined as the first target cord to the right, and multiple target cords to the right are determined sequentially by skipping three cords from the first cord to the right boundary of the distribution area. The target cord on the left and the target cord on the right are identified as the target cord.

4. A simulation system for tire belt layer cords, characterized in that, Simulation methods applied to tire belt layer cords include: An image acquisition device and a computer device, wherein the image acquisition device is connected to the computer device; The image acquisition device is used to acquire images of the tire cross-section belt layer; The computer device is configured to receive the tire cross-section belt layer image, identify the distribution area of ​​the belt layer cords from the belt layer image to determine the fitting function; and execute the simulation method for tire belt layer cords according to any one of claims 1 to 3.

5. A simulation device for tire belt layer cords, characterized in that, include: The acquisition module is used to acquire the coordinates of the unit nodes of multiple cord elements in the two-dimensional mesh model of the tire belt layer cord; The first determining module is used to determine the center coordinates of the plurality of cord units based on the unit node coordinates of the plurality of cord units, and to determine the target distances between the center of the plurality of cord units and the symmetrical points of the two-dimensional mesh model of the belt layer cord. The second determining module is used to sequentially substitute the plurality of target distances into a preset and determined fitting function to determine the belt layer angle of the plurality of cord units. The fitting function is used to represent the relationship between the target distance and the belt layer angle of the cord unit. The simulation module is used to write multiple cord units with determined belt layer angles and the corresponding material properties of the multiple cord units with determined belt layer angles into a simulation file to complete the simulation of the tire belt layer cord. The fitting function is determined by the following methods: acquiring a tire cross-section belt layer image; identifying the distribution area of ​​the belt layer cords from the belt layer image, and determining the transverse centerline and longitudinal centerline of the distribution area as the first horizontal axis and the first vertical axis, wherein the first horizontal axis and the first vertical axis are the horizontal axis and the vertical axis of the first coordinate system of the plane where the distribution area is located; sequentially determining multiple first distances between multiple target cords on the left and right sides of the first vertical axis and the first vertical axis, and multiple first angles between the target cords and the first horizontal axis; determining the fitting function based on the multiple first distances and the multiple first angles; determining the center coordinates of the multiple cord units based on the unit node coordinates of the multiple cord units includes: determining the axis of symmetry of the two-dimensional mesh model of the tire belt layer cords as the second horizontal axis, and determining the symmetry point of the two-dimensional mesh model of the tire belt layer cords as the origin, so as to establish the two-dimensional mesh of the tire belt layer cords. The model is located in a second coordinate system on a plane; the coordinates of the plurality of cord unit nodes are determined in the second coordinate system, and the center coordinates of the plurality of cord units are determined based on the coordinates of the plurality of cord unit nodes; the determination of multiple target distances between the center of the plurality of cord units and the symmetrical point of the two-dimensional mesh model of the belt layer cord includes: determining the square of the difference between the abscissa of the center of the cord unit and the abscissa of the symmetrical point as a first value; determining the square of the difference between the ordinate of the center of the cord unit and the ordinate of the symmetrical point as a second value; determining the square root of the sum of the squares of the first value and the second value as the target distance; determining the center coordinates of the plurality of cord units based on the coordinates of the plurality of cord unit nodes includes: determining the mean of the abscissas corresponding to the cord units as the abscissa of the center coordinates; determining the mean of the ordinates corresponding to the cord units as the ordinate of the center coordinates.

6. An electronic device, characterized in that, include: A memory and a processor, the processor being configured to run a program stored in the memory, wherein the program, when running, executes the simulation method for tire belt layer cords as described in any one of claims 1 to 3.

7. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored program, wherein, when the program is executed, the device containing the non-volatile storage medium is controlled to perform the simulation method for tire belt layer cords as described in any one of claims 1 to 3.

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