A simulation analysis method and system for swing arm failure based on bushing shedding

Abstract

The application provides a kind of based on bushing fall-off swing arm failure simulation analysis method and system, method includes: S1, the structure data and material information of swing arm are acquired, the vehicle speed information when swing arm failure caused by bushing fall-off is acquired;S2, according to the structure data and material information of swing arm, the interference contact assembly analysis model of swing arm bushing is constructed, based on swing arm interference contact assembly working condition, the interference pre-tightening contact stress information of swing arm bushing and swing arm bushing area deformation posture are obtained;S3, based on interference contact assembly analysis model, interference pre-tightening contact stress information, swing arm bushing area deformation posture and the vehicle speed information when swing arm failure caused by bushing fall-off, the swing arm instantaneous impact simulation model is constructed, according to swing arm instantaneous impact simulation model, the short-time impact process when bushing is under the action of external load is simulated.The application can accurately simulate swing arm failure problem caused by bushing fall-off, to optimize the structure design of swing arm bushing, reduce the maintenance cost of whole vehicle later period.

Description

Technical Field

[0001] This invention relates to the field of automotive simulation testing technology, and more specifically, to a method, system, electronic device, and storage medium for simulation analysis of control arm failure based on bushing detachment. Background Technology

[0002] The chassis is a crucial component of the overall vehicle structure and a key assembly in vehicle development. A well-designed chassis ensures superior handling stability, ride comfort, and durability, resulting in a better driving experience and enhanced safety for users. The chassis comprises the running system, braking system, steering system, and transmission system. Among these, the running system is the critical support and force transmission structure of the chassis assembly, and the control arm is a key component in the running system that transmits longitudinal and lateral loads. The control arm mainly consists of sheet metal and bushings. When a vehicle encounters a road obstacle (pothole, ditch, semi-embedded protrusion, etc.) while traveling at high speed, the obstacle generates a reverse longitudinal load in the direction of vehicle travel. This reverse longitudinal load is transmitted to the control arm through the wheels and steering knuckle. If the structural strength of the control arm bushing connection is insufficient to resist the longitudinal load generated by the obstacle, the bushing will detach, leading to control arm failure.

[0003] If the control arm fails, it will damage the chassis structure, requiring repair at a factory. The control arm itself needs to be replaced, increasing the overall vehicle maintenance cost. Currently, traditional simulation analysis methods do not have a specific method to assess this problem, mainly for two reasons.

[0004] Firstly, the control arm is manufactured using an interference fit between sheet metal and bushings. This interference fit presses the steel ring of the sheet metal against the outer steel ring of the bushing, creating a pre-tightening contact stress. This pre-tightening contact stress binds the sheet metal and bushing together, thus significantly impacting the strength and durability of the control arm. Specifically, if the pre-tightening contact stress is too low, the connection between the sheet metal and bushing is insufficient, potentially causing the bushing to detach during normal vehicle operation. Conversely, if the pre-tightening contact stress is too high, it can lead to micro-cracks in the sheet metal, accelerating fatigue and reducing the control arm's lifespan. Therefore, the pre-tightening contact stress factor must be considered in simulation analysis, requiring an implicit static algorithm to determine this stress.

[0005] Secondly, the scenario in which the control arm bushing detaches occurs is when a vehicle encounters a road obstacle while traveling at high speed. The obstacle generates a longitudinal load in the opposite direction of the vehicle's travel. This reverse load is transmitted to the control arm. The interference fit between the control arm bushing and the sheet metal is insufficient to resist the reverse load generated by the obstacle, resulting in bushing detachment. This is a short-duration dynamic impact process (generally with a time period of less than 0.5 seconds). Short-duration dynamic impacts require explicit dynamic algorithms for calculation and solution in simulation analysis.

[0006] Therefore, summarizing the above two points, when using simulation methods to simulate the swing arm failure caused by bushing detachment due to an obstacle impact while a vehicle is traveling at high speed, the simulation analysis requires both implicit static algorithms (e.g., to obtain the interference preload contact stress around the bushing) and explicit dynamic algorithms (e.g., to simulate the short-term impact process of the bushing under external load). Both analytical steps are indispensable. In traditional simulation analysis methods, for an analysis condition requiring multiple analytical steps (two or more), either all implicit static algorithms or all explicit dynamic algorithms are used. Because both implicit static and explicit dynamic algorithms are required simultaneously, traditional simulation analysis methods clearly cannot simulate the swing arm failure caused by bushing detachment due to an obstacle impact while a vehicle is traveling at high speed.

[0007] Therefore, it is necessary to study how to use simulation analysis to analyze the swing arm failure caused by bushing detachment, so as to optimize the structure of the swing arm bushing connection to maintain structural stability, improve vehicle safety performance, and reduce the maintenance cost of the whole vehicle in the later stage. Summary of the Invention

[0008] This invention addresses the technical problems existing in the prior art by providing a method, system, electronic device, and storage medium for simulation analysis of swing arm failure based on bushing detachment. This enables more accurate simulation analysis of swing arm failure, optimizes the structure of the swing arm bushing connection, improves vehicle safety performance, and reduces the overall vehicle maintenance costs in the later stages.

[0009] According to a first aspect of the present invention, a simulation analysis method for swing arm failure based on bushing detachment is provided, comprising:

[0010] S1, obtain the structural data and material information of the swing arm, and obtain the vehicle speed information when the swing arm fails due to bushing detachment;

[0011] S2, construct an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm, and obtain the interference preload contact stress information and the deformation posture of the swing arm bushing area based on the interference contact assembly condition of the swing arm.

[0012] S3, based on the interference contact assembly analysis model, interference preload contact stress information, deformation posture of the swing arm bushing area and vehicle speed information when the swing arm fails due to bushing detachment, constructs a swing arm instantaneous impact simulation model, and simulates the short-time impact process of the bushing under external load according to the swing arm instantaneous impact simulation model.

[0013] Based on the above technical solution, the present invention can also be improved as follows.

[0014] Optionally, in step S1, the vehicle speed information at the time of swing arm failure caused by bushing detachment is obtained, including:

[0015] Speed ​​sensors were installed on the test vehicle to collect and acquire vehicle speed information when the swing arm failed due to bushing detachment.

[0016] Optionally, the structural data and material information of the swing arm can be obtained from the three-dimensional model data of the swing arm.

[0017] Optionally, in step S2, an interference contact assembly analysis model for the swing arm bushing is constructed based on the structural data and material information of the swing arm, including:

[0018] Based on the structural data and material information of the swing arm, the metal sheet of the swing arm is modeled as a hexahedral solid unit, with a solid unit layer of ≥3 layers. The bushing and the inner and outer steel rings of the bushing are modeled as tetrahedral solid units.

[0019] The material and property values ​​of the swing arm are assigned based on its material information; the surface-to-surface contact methods between the swing arm, bushing, and inner and outer steel rings of the bushing are set to obtain the interference contact assembly analysis model of the swing arm bushing.

[0020] Optionally, in step S2, the interference preload contact stress information and the deformation posture of the swing arm bushing area are obtained based on the interference contact assembly condition of the swing arm; including:

[0021] A simulation analysis of the interference preload contact assembly of the swing arm bushing was created, and the analysis model of the interference contact assembly was solved and calculated based on the implicit statics algorithm.

[0022] The calculation process specifically includes:

[0023] Calculate the interference preload contact stress information in the swing arm bushing area, where the interference preload contact stress information is the stress field result generated by the interference fit of the swing arm bushing.

[0024] The deformation posture of the swing arm bushing caused by the preload contact stress of the bushing interference is calculated. The deformation posture of the swing arm bushing is the new spatial coordinate information of each node constituting the grid unit of the swing arm bushing after being subjected to force.

[0025] Optionally, in step S3, based on the interference contact assembly analysis model, interference preload contact stress information, deformation posture of the swing arm bushing area, and vehicle speed information when the swing arm fails due to bushing detachment, a swing arm instantaneous impact simulation model is constructed, including:

[0026] The instantaneous impact simulation model framework of the swing arm is output based on the deformation posture of the swing arm bushing area caused by the interference preload contact stress of the bushing. The instantaneous impact simulation model framework of the swing arm includes at least the grouping information of each unit. The grouping information of each unit includes multiple grid unit IDs, and each grid unit includes multiple node IDs. The node IDs of the instantaneous impact simulation model framework of the swing arm correspond one-to-one with the node IDs of the interference contact assembly analysis model, but the spatial coordinate information of the same node IDs is different.

[0027] The material information, properties and contact relationships associated with the grouping information of each unit in the interference contact assembly analysis model are used to define the grouping information of each unit in the instantaneous impact simulation model frame of the swing arm.

[0028] The initial stress field of the instantaneous impact simulation model of the swing arm is set using the bushing interference preload contact stress information output from the interference contact assembly analysis model.

[0029] The initial velocity of the instantaneous impact simulation model of the swing arm is set using the vehicle speed information when the swing arm fails due to bushing detachment.

[0030] The output is the instantaneous impact simulation model of the swing arm.

[0031] Optionally, in step S3, simulating the short-time impact process of the bushing under external load according to the instantaneous impact simulation model of the swing arm includes:

[0032] Based on the instantaneous impact simulation model of the swing arm, the working condition of the bushing under external load is created. According to the explicit dynamic algorithm, the process of the bushing falling off under impact under external load is simulated.

[0033] According to a second aspect of the present invention, a simulation analysis system for swing arm failure based on bushing detachment is provided, comprising:

[0034] The acquisition module is used to acquire the structural data and material information of the swing arm, and also to acquire the vehicle speed information when the swing arm fails due to bushing detachment.

[0035] The interference contact assembly analysis module constructs an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm. Based on the interference contact assembly working condition of the swing arm, it obtains the interference preload contact stress information and the deformation posture of the swing arm bushing area.

[0036] The swing arm instantaneous impact analysis module is used to construct a swing arm instantaneous impact simulation model based on the interference contact assembly analysis model, interference preload contact stress information, swing arm bushing area deformation posture, and vehicle speed information when the swing arm fails due to bushing detachment. It is also used to simulate the short-term impact process of the bushing under external load based on the swing arm instantaneous impact simulation model.

[0037] According to a third aspect of the present invention, an electronic device is provided, including a memory and a processor, wherein the processor is configured to implement a step of a simulation analysis method for swing arm failure based on bushing detachment when executing a computer management program stored in the memory.

[0038] According to a fourth aspect of the present invention, a computer-readable storage medium is provided having a computer management program stored thereon, which, when executed by a processor, implements the steps of a simulation analysis method for swing arm failure based on bushing detachment.

[0039] This invention provides a method, system, electronic device, and storage medium for simulating swing arm failure based on bushing detachment. The method involves first performing implicit static analysis in the analysis model to obtain the interference preload contact stress information and the deformation state of the bushing steel ring caused by the interference preload contact stress in the area surrounding the outer steel ring of the swing arm bushing. Then, the deformed analysis model is exported, and its material, properties, and contact information are redefined. Simultaneously, the interference preload contact stress is set through a predefined field, allowing the subsequent instantaneous impact analysis model of the swing arm to inherit this stress state. Finally, explicit dynamic analysis is performed to simulate the short-term dynamic impact process of the swing arm. This invention, through a linked analysis approach of "implicit static analysis to obtain interference preload contact stress + redefinition of the deformed analysis model and inheritance of the stress state + explicit dynamic transient impact simulation," successfully overcomes the difficulty of simulating bushing detachment in traditional analysis methods. It fills the gap in the means of simulating swing arm failure based on bushing detachment, provides a more comprehensive dimension for swing arm structural design, further reduces the probability of swing arm failure in actual use, avoids subsequent maintenance, and reduces maintenance costs. Attached Figure Description

[0040] Figure 1 This is an exploded view of the assembly relationship between the swing arm and the bushing.

[0041] Figure 2 A flowchart of a simulation analysis method for swing arm failure based on bushing detachment provided by the present invention;

[0042] Figure 3 This is a schematic diagram illustrating the definition of a simulation model for the instantaneous impact of a swing arm in one embodiment.

[0043] Figure 4A block diagram of the functional modules of the swing arm failure simulation analysis system based on bushing detachment provided by the present invention;

[0044] Figure 5 A schematic diagram of a possible hardware structure of an electronic device provided by the present invention;

[0045] Figure 6 This is a schematic diagram of the hardware structure of a possible computer-readable storage medium provided by the present invention.

[0046] The attached diagram lists the components represented by each number as follows:

[0047] 1. Swing arm; 11. Swing arm steel ring; 2. Bushing; 21. Rubber bushing ring; 22. Outer steel ring of bushing; 23. Inner steel core of bushing. Detailed Implementation

[0048] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0049] To facilitate understanding of the present invention, the relationship between the swing arm and the bushing will first be briefly explained. For example... Figure 1 The diagram shown is an exploded view of the assembly relationship between the swing arm and the bushing. From... Figure 1 As can be seen, bushing 2 is mainly composed of an inner steel core 23, a rubber bushing ring 21, and an outer steel ring 22 nested from the inside out. The rubber bushing ring 21 is vulcanized and bonded to the inner steel core 23 and the outer steel ring 22. The swing arm 1 is connected to the bushing via a swing arm steel ring 11. Specifically, the outer steel ring 22 is embedded in the swing arm steel ring 11 and is interference-fitted.

[0050] Figure 2 A flowchart of a simulation analysis method for swing arm failure based on bushing detachment is provided for this invention, combined with... Figure 1 and Figure 2 As shown, the method includes:

[0051] S1, obtain the structural data and material information of the swing arm, and obtain the vehicle speed information when the swing arm fails due to bushing detachment;

[0052] S2, construct an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm, and obtain the interference preload contact stress information and the deformation posture of the swing arm bushing area based on the interference contact assembly condition of the swing arm.

[0053] S3, based on the interference contact assembly analysis model, interference preload contact stress information, deformation posture of the swing arm bushing area and vehicle speed information when the swing arm fails due to bushing detachment, constructs a swing arm instantaneous impact simulation model, and simulates the short-time impact process of the bushing under external load according to the swing arm instantaneous impact simulation model.

[0054] Understandably, given the deficiencies in the background technology, this invention proposes a simulation analysis method for swing arm failure based on bushing detachment. The method first performs implicit static analysis in the analysis model to obtain the interference preload contact stress information of the area surrounding the outer steel ring of the swing arm bushing and the deformation state of the bushing steel ring caused by the interference preload contact stress. Then, the deformed analysis model is exported and used to create a swing arm instantaneous impact simulation model, followed by explicit dynamic analysis to simulate the short-term dynamic impact process of the swing arm. Through simulation analysis, the structure of the swing arm bushing connection is optimized. The optimized structure ensures that when the vehicle suddenly encounters a road obstacle while traveling at high speed, the structure of the swing arm bushing connection remains stable (the bushing does not detach), preventing swing arm failure and reducing the overall vehicle maintenance costs.

[0055] In one possible embodiment, step S1, obtaining the vehicle speed information at the time of swing arm failure caused by bushing detachment, includes:

[0056] Speed ​​sensors were installed on the test vehicle to collect and acquire vehicle speed information when the swing arm failed due to bushing detachment.

[0057] It is understood that the vehicle speed information referred to in this embodiment is real data collected during actual vehicle testing. Using vehicle speed information collected from actual vehicles to build simulation analysis models can improve the accuracy of simulation results.

[0058] In one possible embodiment, the structural data and material information of the swing arm are obtained through the three-dimensional model data of the swing arm, for example, through the CAD data and material information sheet of the swing arm. The structural design data of the swing arm is used to build a simulation model, and then the simulation results are used to optimize the three-dimensional model data, which can effectively optimize the structural design of the swing arm and improve the quality of the swing arm product.

[0059] In one possible embodiment, step S2 involves constructing an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm, including:

[0060] Based on the structural data and material information of the swing arm, the metal sheet of the swing arm is modeled as a hexahedral solid unit, with a solid unit layer of ≥3 layers. The bushing and the inner and outer steel rings of the bushing are modeled as tetrahedral solid units.

[0061] The material and property values ​​of the swing arm are assigned based on its material information; the surface-to-surface contact methods between the swing arm, bushing, and inner and outer steel rings of the bushing are set to obtain the interference contact assembly analysis model of the swing arm bushing.

[0062] It is understandable that the surface-to-surface contact method between the control arm, bushing, and the inner and outer steel rings of the bushing is as follows: Figure 1 As shown, the control arm and the outer steel ring of the bushing are interference fit, the outer steel ring of the bushing and the rubber bushing are vulcanized bonded, and the rubber bushing and the inner steel core of the bushing are vulcanized bonded.

[0063] In one possible embodiment, step S2 involves obtaining the interference preload contact stress information and the deformation posture of the swing arm bushing region based on the interference contact assembly condition of the swing arm; including:

[0064] A simulation analysis of the interference preload contact assembly of the swing arm bushing was created, and the analysis model of the interference contact assembly was solved and calculated based on the implicit statics algorithm.

[0065] The calculation process specifically includes:

[0066] In ABAQUS software, calculate the interference preload contact stress information in the swing arm bushing area. The interference preload contact stress information is the stress field result generated by the interference fit of the swing arm bushing.

[0067] The deformation posture of the swing arm bushing caused by the preload contact stress due to bushing interference is calculated in ABAQUS software. The deformation posture of the swing arm bushing is the new spatial coordinate information of each node constituting the grid unit of the swing arm bushing after being subjected to force.

[0068] It is understandable that in the interference contact assembly analysis model, the spatial coordinates of each node constituting the mesh element will change after being subjected to force, resulting in new spatial coordinate information. However, in reality, the material, properties, and contact relationships of each node will not change. Based on these characteristics, a simulation analysis model of the deformed state can be constructed.

[0069] like Figure 3 The diagram shown illustrates the definition of the instantaneous impact simulation model for the swing arm. Figure 3 The interference contact assembly analysis model before deformation and the instantaneous impact simulation model of the swing arm after deformation were compared. The key operation points for constructing the instantaneous impact simulation model of the swing arm through the interference contact assembly analysis model were also demonstrated.

[0070] In one possible embodiment, in step S3, as... Figure 3As shown, based on the interference contact assembly analysis model, interference preload contact stress information, deformation posture of the swing arm bushing area, and vehicle speed information when the swing arm fails due to bushing detachment, a simulation model of instantaneous impact on the swing arm is constructed, including:

[0071] The instantaneous impact simulation model framework of the swing arm is output based on the deformation posture of the swing arm bushing area caused by the interference preload contact stress of the bushing. The instantaneous impact simulation model framework of the swing arm includes at least the grouping information of each unit. The grouping information of each unit includes multiple grid unit IDs, and each grid unit includes multiple node IDs. The node IDs of the instantaneous impact simulation model framework of the swing arm correspond one-to-one with the node IDs of the interference contact assembly analysis model, but the spatial coordinate information of the same node IDs is different.

[0072] The material information, properties and contact relationships associated with the grouping information of each unit in the interference contact assembly analysis model are used to define the grouping information of each unit in the instantaneous impact simulation model frame of the swing arm.

[0073] The initial stress field of the instantaneous impact simulation model of the swing arm is set using the bushing interference preload contact stress information output from the interference contact assembly analysis model.

[0074] The initial velocity of the instantaneous impact simulation model of the swing arm is set using the vehicle speed information when the swing arm fails due to bushing detachment.

[0075] The output is the instantaneous impact simulation model of the swing arm.

[0076] It is understood that in this embodiment, both the interference contact assembly analysis model (referring to the analysis model before deformation) and the analysis model after deformation (referring to the swing arm instantaneous impact simulation model frame obtained based on the deformation posture) can be exported as readable and editable files, such as... Figure 3 As shown, both sets of files retain the node IDs, element IDs, and element grouping information (this information is completely identical in both sets of files). The only difference is that the spatial coordinates of the same node differ before and after deformation. The formation rule of the simulation calculation file is: the node ID becomes the element ID, and the element ID becomes the element grouping information; the element grouping information is also associated with material information, properties, and contact relationship information. Therefore, in the deformed analysis model file, we can delete all information except for the node IDs and spatial coordinates, and copy the element IDs, element grouping information, material, and property information from the pre-deformation calculation file to the deformed file, creating a combination similar to a "grafting relationship." After this "grafting" combination, the deformed file completes the definition of the analysis model's materials, properties, and contact relationships.

[0077] After definition, the initial stress field of the interference preload contact stress is set for the deformed analysis model, and the initial velocity is set for the deformed analysis model, thus obtaining the constructed instantaneous impact simulation model of the swing arm.

[0078] For example, the command control statements are as follows:

[0079] a) Initial stress field setup for interference preload contact stress

[0080]

[0081] b) Initial velocity setting

[0082]

[0083] In one possible embodiment, step S3, which involves simulating the short-term impact process of the bushing under external load using the instantaneous impact simulation model of the swing arm, includes:

[0084] A simulation model of instantaneous impact on the swing arm is used to create a working condition for the bushing under external load. An explicit dynamic algorithm is then used to simulate the process of the bushing detaching under impact during external load. After obtaining the simulation analysis results, the structural design of the swing bushing can be optimized in reverse.

[0085] Figure 4 A structural diagram of a swing arm failure simulation analysis system based on bushing detachment provided in an embodiment of the present invention is shown below. Figure 4 As shown, a simulation analysis system for swing arm failure based on bushing detachment includes an acquisition module, an interference contact assembly analysis module, and a swing arm instantaneous impact analysis module, wherein:

[0086] The acquisition module is used to acquire the structural data and material information of the swing arm, and also to acquire the vehicle speed information when the swing arm fails due to bushing detachment.

[0087] The interference contact assembly analysis module constructs an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm. Based on the interference contact assembly working condition of the swing arm, it obtains the interference preload contact stress information and the deformation posture of the swing arm bushing area.

[0088] The swing arm instantaneous impact analysis module is used to construct a swing arm instantaneous impact simulation model based on the interference contact assembly analysis model, interference preload contact stress information, swing arm bushing area deformation posture, and vehicle speed information when the swing arm fails due to bushing detachment. It is also used to simulate the short-term impact process of the bushing under external load based on the swing arm instantaneous impact simulation model.

[0089] It is understood that the swing arm failure simulation analysis system based on bushing detachment provided by the present invention corresponds to the swing arm failure simulation analysis method based on bushing detachment provided in the foregoing embodiments. The relevant technical features of the swing arm failure simulation analysis system based on bushing detachment can be referred to the relevant technical features of the swing arm failure simulation analysis method based on bushing detachment, and will not be repeated here.

[0090] Please see Figure 5 , Figure 5 A schematic diagram illustrating an embodiment of the electronic device provided in this invention. For example... Figure 5 As shown, this embodiment of the invention provides an electronic device 500, including a memory 510, a processor 520, and a computer program 511 stored in the memory 510 and executable on the processor 520. When the processor 520 executes the computer program 511, it performs the following steps:

[0091] S1, obtain the structural data and material information of the swing arm, and obtain the vehicle speed information when the swing arm fails due to bushing detachment;

[0092] S2, construct an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm, and obtain the interference preload contact stress information and the deformation posture of the swing arm bushing area based on the interference contact assembly condition of the swing arm.

[0093] S3, based on the interference contact assembly analysis model, interference preload contact stress information, deformation posture of the swing arm bushing area and vehicle speed information when the swing arm fails due to bushing detachment, constructs a swing arm instantaneous impact simulation model, and simulates the short-time impact process of the bushing under external load according to the swing arm instantaneous impact simulation model.

[0094] Please see Figure 6 , Figure 6 This is a schematic diagram illustrating an embodiment of a computer-readable storage medium provided by the present invention. (See diagram below.) Figure 6 As shown, this embodiment provides a computer-readable storage medium 600, on which a computer program 611 is stored. When the computer program 611 is executed by a processor, it performs the following steps:

[0095] S1, obtain the structural data and material information of the swing arm, and obtain the vehicle speed information when the swing arm fails due to bushing detachment;

[0096] S2, construct an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm, and obtain the interference preload contact stress information and the deformation posture of the swing arm bushing area based on the interference contact assembly condition of the swing arm.

[0097] S3, based on the interference contact assembly analysis model, interference preload contact stress information, deformation posture of the swing arm bushing area and vehicle speed information when the swing arm fails due to bushing detachment, constructs a swing arm instantaneous impact simulation model, and simulates the short-time impact process of the bushing under external load according to the swing arm instantaneous impact simulation model.

[0098] This invention provides a method, system, and storage medium for simulating swing arm failure based on bushing detachment. The method involves first performing implicit static analysis in the analysis model to obtain the interference preload contact stress information and the deformation state of the bushing steel ring caused by the interference preload contact stress in the area surrounding the outer steel ring of the swing arm bushing. Then, the deformed analysis model is exported, and its material, properties, and contact information are redefined. Simultaneously, the interference preload contact stress is set through a predefined field, allowing the subsequent instantaneous impact analysis model of the swing arm to inherit this stress state. Finally, explicit dynamic analysis is performed to simulate the short-term dynamic impact process of the swing arm. This invention, through a linked analysis approach of "implicit static analysis to obtain interference preload contact stress + redefinition of the deformed analysis model and inheritance of the stress state + explicit dynamic transient impact simulation," successfully overcomes the difficulty of simulating bushing detachment in traditional analysis methods. It fills the gap in the means of simulating swing arm failure based on bushing detachment, provides a more comprehensive dimension for swing arm structural design, further reduces the probability of swing arm failure in actual use, avoids subsequent maintenance, and reduces maintenance costs.

[0099] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0100] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0101] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0102] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0103] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0104] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0105] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A simulation analysis method for swing arm failure based on bushing detachment, characterized in that, include: S1, obtain the structural data and material information of the swing arm, and obtain the vehicle speed information when the swing arm fails due to bushing detachment; S2, construct an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm, and obtain the interference preload contact stress information and the deformation posture of the swing arm bushing area based on the interference contact assembly condition of the swing arm. S3. Based on the interference contact assembly analysis model, interference preload contact stress information, deformation posture of the swing arm bushing area and vehicle speed information when the swing arm fails due to bushing detachment, a swing arm instantaneous impact simulation model is constructed. The short-time impact process of the bushing under external load is simulated according to the swing arm instantaneous impact simulation model. include: The instantaneous impact simulation model framework of the swing arm is output based on the deformation posture of the swing arm bushing area caused by the interference preload contact stress of the bushing. The instantaneous impact simulation model framework of the swing arm includes at least the grouping information of each unit. The grouping information of each unit includes multiple grid unit IDs, and each grid unit includes multiple node IDs. The node IDs of the instantaneous impact simulation model framework of the swing arm correspond one-to-one with the node IDs of the interference contact assembly analysis model, but the spatial coordinate information of the same node IDs is different. The material information, properties and contact relationships associated with the grouping information of each unit in the interference contact assembly analysis model are used to define the grouping information of each unit in the instantaneous impact simulation model frame of the swing arm. The initial stress field of the instantaneous impact simulation model of the swing arm is set using the bushing interference preload contact stress information output from the interference contact assembly analysis model. The initial velocity of the instantaneous impact simulation model of the swing arm is set using the vehicle speed information when the swing arm fails due to bushing detachment. The output is the instantaneous impact simulation model of the swing arm; Based on the instantaneous impact simulation model of the swing arm, the working condition of the bushing under external load is created. According to the explicit dynamic algorithm, the process of the bushing falling off under impact under external load is simulated.

2. The simulation analysis method for swing arm failure based on bushing detachment according to claim 1, characterized in that, In step S1, the vehicle speed information at the time of swing arm failure caused by bushing detachment is obtained, including: Speed ​​sensors were installed on the test vehicle to collect and acquire vehicle speed information when the swing arm failed due to bushing detachment.

3. The simulation analysis method for swing arm failure based on bushing detachment according to claim 1, characterized in that, The structural data and material information of the swing arm are obtained through the three-dimensional model data of the swing arm.

4. The simulation analysis method for swing arm failure based on bushing detachment according to claim 1, characterized in that, In step S2, an interference contact assembly analysis model for the swing arm bushing is constructed based on the structural data and material information of the swing arm, including: Based on the structural data and material information of the swing arm, the metal sheet of the swing arm is modeled as a hexahedral solid unit, with a solid unit layer of ≥3 layers. The bushing and the inner and outer steel rings of the bushing are modeled as tetrahedral solid units. The material and property values ​​of the swing arm are assigned based on its material information; the surface-to-surface contact methods between the swing arm, bushing, and inner and outer steel rings of the bushing are set to obtain the interference contact assembly analysis model of the swing arm bushing.

5. The simulation analysis method for swing arm failure based on bushing detachment according to claim 1, characterized in that, In step S2, the interference preload contact stress information and deformation posture of the swing arm bushing area are obtained based on the interference contact assembly condition of the swing arm; including: A simulation analysis of the interference preload contact assembly of the swing arm bushing was created, and the analysis model of the interference contact assembly was solved and calculated based on the implicit statics algorithm. The calculation process specifically includes: Calculate the interference preload contact stress information in the swing arm bushing area, where the interference preload contact stress information is the stress field result generated by the interference fit of the swing arm bushing. The deformation posture of the swing arm bushing caused by the preload contact stress of the bushing interference is calculated. The deformation posture of the swing arm bushing is the new spatial coordinate information of each node constituting the grid unit of the swing arm bushing after being subjected to force.

6. A simulation analysis system for swing arm failure based on bushing detachment, characterized in that, include: The acquisition module is used to acquire the structural data and material information of the swing arm, and also to acquire the vehicle speed information when the swing arm fails due to bushing detachment. The interference contact assembly analysis module constructs an interference contact assembly analysis model for the swing arm bushing based on the structural data and material information of the swing arm. Based on the interference contact assembly working condition of the swing arm, it obtains the interference preload contact stress information and the deformation posture of the swing arm bushing area. The swing arm instant impact analysis module is used to construct a swing arm instant impact simulation model based on the interference contact assembly analysis model, interference preload contact stress information, swing arm bushing area deformation posture and vehicle speed information when the swing arm fails due to bushing detachment. It is also used to simulate the short-time impact process of the bushing under external load according to the swing arm instant impact simulation model. include: The instantaneous impact simulation model framework of the swing arm is output based on the deformation posture of the swing arm bushing area caused by the interference preload contact stress of the bushing. The instantaneous impact simulation model framework of the swing arm includes at least the grouping information of each unit. The grouping information of each unit includes multiple grid unit IDs, and each grid unit includes multiple node IDs. The node IDs of the instantaneous impact simulation model framework of the swing arm correspond one-to-one with the node IDs of the interference contact assembly analysis model, but the spatial coordinate information of the same node IDs is different. The material information, properties and contact relationships associated with the grouping information of each unit in the interference contact assembly analysis model are used to define the grouping information of each unit in the instantaneous impact simulation model frame of the swing arm. The initial stress field of the instantaneous impact simulation model of the swing arm is set using the bushing interference preload contact stress information output from the interference contact assembly analysis model. The initial velocity of the instantaneous impact simulation model of the swing arm is set using the vehicle speed information when the swing arm fails due to bushing detachment. The output is the instantaneous impact simulation model of the swing arm; Based on the instantaneous impact simulation model of the swing arm, the working condition of the bushing under external load is created. According to the explicit dynamic algorithm, the process of the bushing falling off under impact under external load is simulated.

7. An electronic device, characterized in that, It includes a memory and a processor, wherein the processor is used to execute computer management programs stored in the memory to implement the steps of the swing arm failure simulation analysis method based on bushing detachment as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, It stores a computer management program, which, when executed by a processor, implements the steps of a simulation analysis method for swing arm failure based on bushing detachment as described in any one of claims 1-5.

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