A method, system and device for analyzing the working vibration mode of automobile torsion beam system

Abstract

The present application relates to the field of mechanical engineering technology, and discloses a method, system and equipment for analyzing the working vibration mode of an automobile torsion beam system, wherein the method comprises: digitizing a durable road surface of a real test field to generate a durable road surface model of a virtual test field; generating a virtual tire model through real tire performance parameter tests and parameter identification; constructing a whole vehicle dynamics model through whole vehicle performance parameter tests, and performing debugging and verification; flexibly processing the torsion beam, and setting a plurality of acceleration response points on the torsion beam; applying the virtual tire model and the debugged and verified whole vehicle dynamics model to the durable road surface model of a virtual test field, simulating various working conditions of a test field road test, and analyzing and obtaining the working vibration mode of the torsion beam system, which solves the technical problem that the working vibration mode analysis process of the torsion beam system is time-consuming and labor-intensive, and realizes the technical effect of simulating and analyzing the working vibration mode of the torsion beam system, so as to shorten the product development cycle and reduce costs.

Description

Technical Field

[0001] The present application relates to the field of mechanical engineering technology, and in particular to a method, system and equipment for analyzing the working vibration mode of an automobile torsion beam system. Background Art

[0002] In the process of automobile product development, the torsion beam system, as an important component of the automobile system, plays an important role in automobile roll support, vibration reduction or vibration isolation. The torsion beam system connects the left and right wheels of the car through a torsion beam. In related technologies, the vibration mode of the torsion beam system can generally only be measured and analyzed after the actual car is produced. By installing an acceleration sensor on the torsion beam, the measured acceleration data is obtained to perform vibration mode analysis on the torsion beam system. The components of the torsion beam system are formal mold parts with high mold opening costs. If the plan is adjusted through actual measurement and analysis after the car is produced, it will be time-consuming and labor-intensive, and cannot meet the needs of rapid iteration in the automotive industry. Summary of the invention

[0003] The present application provides a method, system and device for analyzing the working vibration mode of an automobile torsion beam system, which solves the technical problem of time-consuming and labor-intensive working vibration mode analysis of the torsion beam system in the related art, and realizes the technical effect of simulating and analyzing the working vibration mode of the torsion beam system to shorten the product development cycle and reduce costs.

[0004] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, an embodiment of the present application provides a method for analyzing the working vibration mode of an automobile torsion beam system, the method comprising: digitizing a real test field durable road surface to generate a virtual test field durable road surface model; generating a virtual tire model through real tire performance parameter tests and parameter identification; constructing a whole vehicle dynamics model through whole vehicle performance parameter tests, and performing debugging and verification; in the whole vehicle dynamics model, flexibly processing the torsion beam and setting a plurality of acceleration response points on the torsion beam; applying the virtual tire model and the debugged and verified whole vehicle dynamics model to the virtual test field durable road surface model, simulating various working conditions of the test field road test according to the road test specifications, extracting the acceleration curves of the plurality of acceleration response points, and analyzing to obtain the working vibration mode of the torsion beam system.

[0006] The working vibration mode analysis method of the automobile torsion beam system provided in the present embodiment generates a virtual testing ground durable road surface model by digitizing the real testing ground durable road surface; generates a virtual tire model by real tire performance parameter test and parameter identification; constructs a whole vehicle dynamics model by whole vehicle performance parameter test, and performs debugging and verification; in the whole vehicle dynamics model, the torsion beam is flexibly processed, and a plurality of acceleration response points are set on the torsion beam; the virtual tire model and the debugged and verified whole vehicle dynamics model are applied to the virtual testing ground durable road surface model, and according to the road test specification, various working conditions of the testing ground road test are simulated, the acceleration curves of a plurality of acceleration response points are extracted, and the working vibration mode of the torsion beam system is obtained by analysis, thereby solving the technical problem that the working vibration mode analysis process of the torsion beam system is time-consuming and labor-intensive, and realizing the technical effect of simulating and analyzing the working vibration mode of the torsion beam system, so as to shorten the product development cycle and reduce the cost.

[0007] Optionally, the digitizing of the durable pavement of the real test field to generate the durable pavement model of the virtual test field specifically includes: based on the durable pavement of the real test field, using a vehicle-mounted laser scanning method to obtain pavement point cloud data; gridding the point cloud data to obtain the durable pavement model of the virtual test field.

[0008] Optionally, the virtual tire model is generated through real tire performance parameter testing and parameter identification, specifically including: extracting multiple tire samples, and conducting ground contact test, static characteristic test, steady-state characteristic test and drum bump test on a laboratory test bench according to the tire working pressure and load to obtain tire performance parameters under various working conditions; based on the tire performance parameters, a virtual tire model is generated through parameter identification.

[0009] Optionally, the flexible processing of the torsion beam and setting a plurality of acceleration response points on the torsion beam specifically includes: using finite element software to perform grid discretization processing on the digital model of the torsion beam, and symmetrically setting a plurality of acceleration response points on the torsion beam at specified intervals and equal distances.

[0010] Optionally, an acceleration response point is set at the center of the torsion beam, and the specified interval is 200±50 mm.

[0011] Optionally, extracting the acceleration curves of the multiple acceleration response points and analyzing to obtain the working vibration mode of the torsion beam system specifically includes: based on the acceleration curves of the multiple acceleration response points, using the cross power spectrum function to analyze the working vibration mode of the torsion beam system to obtain the vibration frequency and vibration form.

[0012] Optionally, the specific contents of the debugging and verification include: checking the mass, inertia and characteristics of elastic components of the vehicle dynamics model.

[0013] Optionally, CDtire / PI software is used to perform parameter identification, and the virtual tire model belongs to the CDtire tire model.

[0014] In a second aspect, an embodiment of the present application provides a system for analyzing the working vibration mode of an automobile torsion beam system, the system comprising: a virtual road surface module, for digitizing a real test field durable road surface to generate a virtual test field durable road surface model; a virtual tire module, for generating a virtual tire model through real tire performance parameter tests and parameter identification; a whole vehicle dynamics model construction module, for constructing a whole vehicle dynamics model through whole vehicle performance parameter tests, and performing debugging and verification; for flexibly processing the torsion beam in the whole vehicle dynamics model, and setting a plurality of acceleration response points on the torsion beam; a vibration mode analysis module, for applying the virtual tire model and the debugged and verified whole vehicle dynamics model to the virtual test field durable road surface model, simulating various working conditions of the test field road test according to the road test specifications, extracting the acceleration curves of the plurality of acceleration response points, and analyzing to obtain the working vibration mode of the torsion beam system.

[0015] In a third aspect, an embodiment of the present application provides a computer device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the above method by executing the computer instructions.

[0016] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above method.

[0017] In a fifth aspect, an embodiment of the present application provides a computer program product, including computer instructions, which are used to enable a computer to execute the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A flow chart of a method for analyzing the working vibration mode of an automobile torsion beam system provided in an embodiment of the present application;

[0020] Figure 2 A distribution diagram of acceleration response points of a real torsion beam system provided in an embodiment of the present application;

[0021] Figure 3 A three-dimensional acceleration curve diagram of a single acceleration response point in a torsion beam system obtained in a real test field provided in an embodiment of the present application;

[0022] Figure 4 A distribution diagram of acceleration response points of a virtual torsion beam system provided in an embodiment of the present application;

[0023] Figure 5 A comparison diagram of vibration power spectra of a torsion beam system provided in an embodiment of the present application obtained in a real test field and in a virtual test field;

[0024] Figure 6 A schematic diagram of a working vibration mode analysis system for an automobile torsion beam system provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] In the process of automobile product development, the torsion beam system is an important component of the automobile system, and it plays an important role in automobile roll support, vibration reduction or vibration isolation. The torsion beam system connects the left and right wheels of the car through the torsion beam. In the related technology, the vibration mode of the torsion beam system can generally only be measured and analyzed after the real car is produced. By installing an acceleration sensor on the torsion beam, the measured acceleration data is obtained to analyze the vibration mode of the torsion beam system. The components of the torsion beam system are formal mold parts, and the mold opening cost is high. If the plan is adjusted through actual measurement after the car is produced, it will be time-consuming and labor-intensive, and it cannot meet the needs of rapid iteration in the automobile industry. If the working vibration mode of the torsion beam system can be analyzed by simulation, the resonance problem caused by the proximity of the excitation frequency and the natural frequency of the torsion beam system can be predicted in advance during the automobile production process, thereby avoiding abnormal noise caused by resonance and cracking of the torsion beam. At the same time, it can provide technical support for the accurate development of product components, shorten the product development cycle, and reduce costs. Among them, the working vibration mode includes the vibration frequency and vibration form of the structure in the working state.

[0028] The embodiment of the present application provides a method for analyzing the working vibration mode of an automobile torsion beam system, by constructing a virtual test field durable road model, a virtual tire model, and a whole vehicle dynamics model, in the whole vehicle dynamics model, the torsion beam is flexibly processed, and multiple acceleration response points are set on the torsion beam, the virtual tire model and the debugged and verified whole vehicle dynamics model are applied to the virtual test field durable road model, and according to the road test specifications, the acceleration curves of multiple acceleration response points can be obtained, and based on the acceleration curves, the working vibration mode of the torsion beam system can be analyzed. The method for analyzing the working vibration mode of an automobile torsion beam system provided in the embodiment of the present application can be used to guide the whole vehicle development process.

[0029] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0030] Please refer to Figure 1 , Figure 1 : is a flow chart of a method for analyzing the working vibration mode of an automobile torsion beam system provided in an embodiment of the present application. Figure 1 As shown, the process includes the following steps:

[0031] Step S1, digitizing the durable road surface of the real test site to generate a durable road surface model of the virtual test site.

[0032] Among them, the real test field durable pavement refers to the pavement built in the real test field to simulate various actual road conditions, which can be used to test the durability of the car, including irregular pavement, heavy washboard pavement, cobblestone pavement and fish scale pit road, etc.

[0033] Through three-dimensional digital road modeling technology, the durable road surface of the real test site is digitized, and the corresponding virtual test site durable road surface model is generated in the virtual environment, which can be used to simulate the impact of actual road conditions on vehicle performance in the virtual environment.

[0034] Step S3, generating a virtual tire model through real tire performance parameter testing and parameter identification.

[0035] Among them, parameter identification is used to fit the tire performance parameters obtained from the real tire performance parameter test and convert them into parameter characteristics of the virtual tire model. The virtual tire model is used to simulate the performance characteristics of the tire during movement in a virtual environment. For example, the real tire performance parameter test includes a contact patch test, a static characteristic test, a steady-state characteristic test, and a drum bump test on the real tire. Tire performance parameters include footprint shape and friction coefficient, etc.

[0036] Step S5, constructing a vehicle dynamics model through vehicle performance parameter testing, and performing debugging and verification.

[0037] Among them, the vehicle performance parameter test includes the vehicle K&C test, bushing performance test, shock absorber characteristic test and buffer block performance test. The vehicle performance parameters are obtained through the vehicle performance parameter test, and the vehicle dynamics model is constructed based on the vehicle performance parameters. The vehicle dynamics model can be used to simulate the performance characteristics of the car during movement. The vehicle dynamics model includes building the front and rear suspension systems, steering systems, powertrain systems, etc. of the car in a virtual environment. For example, by importing the vehicle performance parameters into the multi-body dynamics software, the vehicle dynamics model can be built in a virtual environment.

[0038] Debugging and verifying the vehicle dynamics model, including checking the mass, inertia and characteristics of elastic components, can improve the accuracy of the vehicle dynamics model.

[0039] Step S7: in the vehicle dynamics model, the torsion beam is subjected to flexibility processing, and a plurality of acceleration response points are set on the torsion beam.

[0040] Among them, in the whole vehicle dynamics model, the torsion beam is flexibly treated so that the torsion beam deforms when subjected to force, so as to transmit the excitation more accurately, further improving the accuracy of the whole vehicle dynamics model.

[0041] The acceleration response point refers to a specific location pre-selected on the torsion beam, where an acceleration sensor is installed to measure the acceleration response of the point. The acceleration response of the torsion beam measured under road excitation can be used to analyze the working vibration mode of the torsion beam system.

[0042] Step S9, applying the virtual tire model and the debugged and verified vehicle dynamics model to the virtual test field durable road model, simulating various working conditions of the test field road test according to the road test specifications, extracting the acceleration curves of multiple acceleration response points, and analyzing to obtain the working vibration mode of the torsion beam system.

[0043] Among them, road test specifications refer to a series of standardized test procedures and methods developed to evaluate the performance and reliability of automobiles. According to the road test specifications, a virtual car consisting of a virtual tire model and a vehicle dynamics model is tested on a durable road surface in a virtual test field. It is used to perform dynamic simulation of the same route and speed as the actual driving program. The acceleration curve of the acceleration response point can be obtained by simulation and solution using ADAMS software. Based on the acceleration curve, the working vibration mode of the torsion beam system can be analyzed using the cross-power spectrum function.

[0044] For example, the road test conditions at the test site include passing through a heavy scree road at a speed of 50km / h, passing through an irregular road surface at a speed of 40km / h, etc.

[0045] The working vibration mode analysis method of the automobile torsion beam system provided in the present embodiment generates a virtual testing ground durable road surface model by digitizing the real testing ground durable road surface; generates a virtual tire model by real tire performance parameter test and parameter identification; constructs a whole vehicle dynamics model by whole vehicle performance parameter test, and performs debugging and verification; in the whole vehicle dynamics model, the torsion beam is flexibly processed, and a plurality of acceleration response points are set on the torsion beam; the virtual tire model and the debugged and verified whole vehicle dynamics model are applied to the virtual testing ground durable road surface model, and according to the road test specification, various working conditions of the testing ground road test are simulated, the acceleration curves of a plurality of acceleration response points are extracted, and the working vibration mode of the torsion beam system is obtained by analysis, thereby solving the technical problem that the working vibration mode analysis process of the torsion beam system is time-consuming and labor-intensive, and realizing the technical effect of simulating and analyzing the working vibration mode of the torsion beam system, so as to shorten the product development cycle and reduce the cost.

[0046] In some embodiments, the durable road surface of the real test site is digitized to generate a durable road surface model of the virtual test site, which specifically includes: based on the durable road surface of the real test site, using a vehicle-mounted laser scanning method to obtain road surface point cloud data; gridding the point cloud data to obtain a durable road surface model of the virtual test site.

[0047] For example, laser scanning of the durable road surface of the real test site can generate point cloud data that can reflect the static characteristics of the road surface. The point cloud data is processed based on the Python programming language and the Open3D library, and the point cloud data is gridded through the interpolation algorithm to generate a durable road surface model of the virtual test site.

[0048] In some embodiments, a virtual tire model is generated through real tire performance parameter testing and parameter identification, specifically including: extracting multiple tire samples, and conducting ground contact test, static characteristic test, steady-state characteristic test and drum bump test on a laboratory test bench according to the tire working pressure and load to obtain tire performance parameters under various working conditions; based on the tire performance parameters, a virtual tire model is generated through parameter identification.

[0049] Multiple tire samples are randomly selected from the tire production batch to ensure the representativeness of the test results. Laboratory physical tests are carried out on the tire samples to obtain the tire performance parameters under different working conditions. The tire performance parameters are identified using CDtire / PI software and converted into performance parameters of the virtual tire model to predict the performance of the tire under various working conditions. The virtual tire model belongs to the CDtire tire model.

[0050] Among them, the static characteristic test includes the lateral stiffness of the transverse bump, the lateral, longitudinal and torsional stiffness of the flat road, the vertical stiffness of the flat road, transverse, longitudinal and oblique bumps, etc. The steady-state characteristic test includes the pure longitudinal slip, pure sideslip, and compound roll and sideslip tests.

[0051] In some embodiments, the torsion beam is flexibly processed and a plurality of acceleration response points are set on the torsion beam, specifically including: using finite element software to perform grid discretization processing on the digital model of the torsion beam, and symmetrically setting a plurality of acceleration response points on the torsion beam at specified intervals and equal distances.

[0052] Specifically, a finite element model of a torsion beam is constructed using finite element software. The finite element model of the torsion beam includes a plurality of nodes, and the nodes are deformed under the action of excitation to transmit the excitation more accurately.

[0053] In some embodiments, please refer to Figure 2 , Figure 2 The distribution diagram of the acceleration response points of the real torsion beam system provided in the embodiment of the present application. Figure 2 As shown in Figure 2, an acceleration response point is set at the center of the torsion beam ( Figure 2 ), and set multiple acceleration response points symmetrically and equidistantly on the torsion beam at specified intervals, such as Figure 2 As shown, 13 acceleration response points are symmetrically arranged on the torsion beam, which are represented by TB_1 to TB_13 respectively.

[0054] Optionally, the specified interval between adjacent acceleration response points is 200±50 mm.

[0055] In some embodiments, acceleration curves of multiple acceleration response points are extracted, and the working vibration mode of the torsion beam system is obtained by analysis, specifically including: based on the acceleration curves of multiple acceleration response points, the working vibration mode of the torsion beam system is analyzed using the cross power spectrum function to obtain the vibration frequency and vibration form.

[0056] Specifically, based on the acceleration curves of multiple acceleration response points, the frequency spectrum of acceleration is obtained by Fourier transform, and the cross power spectrum function of acceleration is calculated. The vibration frequency and vibration form are identified from the cross power spectrum function to characterize the working vibration mode of the torsion beam system.

[0057] In order to ensure the simulation accuracy of the working vibration mode analysis method of the automobile torsion beam system provided in this embodiment, in the process of constructing the durable road surface model of the virtual test field, the accuracy of the laser scanning equipment was calibrated and the accuracy of the point cloud data was verified; in the process of constructing the virtual tire model, the virtual tire model was verified by using ADAMS software; in the process of constructing the whole vehicle dynamics model, the model was debugged and checked; in the process of applying the virtual tire model and the debugged and verified whole vehicle dynamics model to the durable road surface model of the virtual test field, relevant benchmarking tests were carried out to verify its simulation accuracy, specifically including:

[0058] like Figure 3 As shown, Figure 3 The three-dimensional acceleration curve of a single acceleration response point in a torsion beam system obtained in a real test field provided in the embodiment of the present application, wherein the test field road test condition is that the car is tested at a speed of 50km / h on a heavy washboard road surface. Figure 3 As shown, it is an acceleration curve diagram of the acceleration response point at the position of TB_4 on the torsion beam in the three-dimensional direction of the xyz axis. Figure 3 In , ch_10 to ch_12 represent channel numbers. According to the acceleration curve obtained in the real test field, the working vibration mode of the torsion beam system in the real test field is analyzed, and its vibration frequency is 21.13.

[0059] like Figure 4 As shown, Figure 4 The distribution diagram of the acceleration response points of the virtual torsion beam system provided in the embodiment of the present application is as follows: Figure 4 As shown in the figure, according to the position distribution of the acceleration response points of the torsion beam system in the virtual environment, acceleration sensors are installed at the corresponding positions on the torsion beam. Figure 4 In the figure, VTB_1 to VTB_13 are used to represent the road test conditions in the virtual environment. According to the road test conditions in the virtual environment, the corresponding road test conditions are selected in the corresponding real test field, that is, the car passes through the heavy washboard road at a speed of 50km / h. The acceleration curve of the torsion beam obtained in the real test field is analyzed to obtain the real working vibration mode of the torsion beam system, which is compared with the virtual working vibration mode of the torsion beam system obtained in the virtual environment to verify the accuracy of the simulation. The acceleration curve obtained in the virtual test field is analyzed to obtain the vibration frequency of the working vibration mode of the torsion beam system in the virtual test field is 20.96. Please refer to Figure 5 , Figure 5 The vibration power spectrum comparison diagram of the torsion beam system provided in the embodiment of the present application in the real test field and the virtual test field is represented by the solid line and the dotted line respectively. Figure 5It can be seen that the vibration forms of the torsion beam system in the real test field and in the virtual test field are similar, and the error ratio of the vibration frequency is within 5%, which verifies that the simulation method proposed in the embodiment of the present application has high accuracy.

[0060] The automobile torsion beam system working vibration mode analysis method provided in the embodiment of the present application can be used to guide the automobile production process after the accuracy verification of the above steps, and realizes the technical effect of simulating and analyzing the working vibration mode of the torsion beam system to shorten the product development cycle and reduce costs.

[0061] Please refer to Figure 6 , Figure 6 A schematic diagram of a working vibration mode analysis system for an automobile torsion beam system provided in an embodiment of the present application comprises: a virtual road surface module, which is used to digitize a real test field durable road surface and generate a virtual test field durable road surface model; a virtual tire module, which is used to generate a virtual tire model through real tire performance parameter tests and parameter identification; a whole vehicle dynamics model construction module, which is used to construct a whole vehicle dynamics model through whole vehicle performance parameter tests and perform debugging and verification; and is used to flexibly process the torsion beam in the whole vehicle dynamics model and set multiple acceleration response points on the torsion beam; and a vibration mode analysis module, which is used to apply the virtual tire model and the debugged and verified whole vehicle dynamics model to the virtual test field durable road surface model, simulate various working conditions of the test field road test according to the road test specifications, extract the acceleration curves of multiple acceleration response points, and analyze and obtain the working vibration mode of the torsion beam system.

[0062] The automobile torsion beam system working vibration mode analysis system in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0063] See also Figure 7 , Figure 7 A schematic diagram of the structure of a computer device provided in an embodiment of the present application is shown in FIG. Figure 7As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 7 A processor 10 is taken as an example.

[0064] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0065] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0066] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0067] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory. The computer device also includes a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0068] The embodiment of the present application also provides a computer-readable storage medium. The above method according to the embodiment of the present application can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0069] The embodiment of the present application provides a computer program product, which includes computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method of any embodiment of the present application.

[0070] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

[0071] The systems, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0072] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0073] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0074] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices, and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0075] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0076] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0077] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0078] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0079] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

[0080] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for analyzing the working vibration mode of an automobile torsion beam system, characterized in that: The method comprises: Digitize the durable pavement in the real test field and generate a durable pavement model of the virtual test field; Generate a virtual tire model through real tire performance parameter tests and parameter identification; Through the vehicle performance parameter test, the vehicle dynamics model is constructed and debugged and verified; In the vehicle dynamics model, the torsion beam is made flexible and multiple acceleration response points are set on the torsion beam. The virtual tire model and the debugged and verified vehicle dynamics model are applied to the durable road model of the virtual test field. According to the road test specifications, various working conditions of the test field road test are simulated, the acceleration curves of the multiple acceleration response points are extracted, and the working vibration mode of the torsion beam system is obtained by analysis.

2. The method according to claim 1, characterized in that The method of digitizing the durable road surface of the real test site to generate a durable road surface model of the virtual test site specifically includes: Based on the durable pavement of the real test site, the vehicle-mounted laser scanning method is used to obtain the pavement point cloud data; the point cloud data is gridded to obtain the durable pavement model of the virtual test site.

3. The method according to claim 1, characterized in that The generation of a virtual tire model through real tire performance parameter testing and parameter identification specifically includes: Take multiple tire samples and conduct ground contact test, static characteristic test, steady-state characteristic test and drum bump test on the laboratory test bench to obtain tire performance parameters; Based on tire performance parameters, a virtual tire model is generated through parameter identification.

4. The method according to claim 1, characterized in that: The flexible processing of the torsion beam and setting of multiple acceleration response points on the torsion beam specifically include: using finite element software to perform grid discretization processing on the digital model of the torsion beam, and setting multiple acceleration response points symmetrically and equidistantly at specified intervals on the torsion beam.

5. The method according to claim 4, characterized in that The acceleration response point is set at the center of the torsion beam, and the specified interval is 200±50mm.

6. The method according to claim 1, characterized in that The extracting of the acceleration curves of the multiple acceleration response points and analyzing to obtain the working vibration mode of the torsion beam system specifically includes: based on the acceleration curves of the multiple acceleration response points, using the cross power spectrum function to analyze the working vibration mode of the torsion beam system to obtain the vibration frequency and vibration form.

7. The method according to claim 1, characterized in that The specific contents of the debugging and verification include: checking the quality, inertia and characteristics of elastic components of the vehicle dynamics model.

8. The method according to claim 1, characterized in that Parameter identification is performed using CDtire / PI software, and the virtual tire model belongs to the CDtire tire model.

9. A vibration mode analysis system for an automobile torsion beam system, characterized in that: The system comprises: Virtual pavement module, used to digitize the durable pavement of the real test site and generate a durable pavement model of the virtual test site; A virtual tire module is used to generate a virtual tire model through real tire performance parameter testing and parameter identification; The vehicle dynamics model building module is used to build the vehicle dynamics model through vehicle performance parameter tests and perform debugging and verification; it is used to perform flexible processing on the torsion beam in the vehicle dynamics model and set multiple acceleration response points on the torsion beam; The vibration mode analysis module is used to apply the virtual tire model and the debugged and verified vehicle dynamics model to the durable road model of the virtual test field, simulate various working conditions of the test field road test according to the road test specifications, extract the acceleration curves of the multiple acceleration response points, and analyze and obtain the working vibration mode of the torsion beam system.

10. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 8 by executing the computer instructions.

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