Vehicle door opening and closing performance analysis method and analysis device and storage medium

Abstract

The invention discloses a car door opening and closing performance analysis method and device and a storage medium, the car door opening and closing performance analysis method comprises the steps that a model of the door lock meshing process of a car door is obtained, and the model simulates the idle stroke and mechanical action of door lock meshing through a plurality of connecting units and a meshing force-displacement curve; analyzing the opening and closing fatigue characteristics of the vehicle door according to the model. According to the analysis method, the modeling process of the model is simplified, the tedious entity modeling process is avoided, the modeling time and consumption of computing resources are reduced, the simulation efficiency is improved, the idle stroke and the mechanical action of the door lock of the vehicle door in the meshing process can be accurately simulated, and therefore the simulation precision is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a method for analyzing door switch performance, a device for analyzing door switch performance, and a non-volatile readable storage medium. Background Art

[0002] As a critical component of a vehicle, the performance of vehicle doors significantly impacts the strength, rigidity, and crashworthiness of the vehicle's overall structure. In actual use, vehicle doors are frequently used, opening and closing them every time the vehicle is used. Therefore, door opening and closing performance (such as door opening and closing fatigue characteristics) is a key performance indicator. During this process, the door lock body engages the lock hook through a mechanism to lock the door, a process involving complex mechanical interactions.

[0003] Currently, the analysis of the door opening and closing fatigue characteristics can be performed using transient nonlinear finite element analysis methods. Specifically, the door lock engagement process simulation is primarily achieved by establishing a detailed solid mesh model, including simulation of complex structures such as the ratchet, pawl, and torsion spring. However, this approach has several drawbacks: Accurately reproducing the door lock's locking and engagement process requires the creation of a high-quality mesh model, a cumbersome process that consumes significant computational resources. Furthermore, the degree of mesh refinement and accuracy directly impacts the simulation results. Low-quality meshes can easily lead to hourglassing and self-locking of the elements, as well as large burrs in the contact force. Furthermore, during the subsequent calibration of the mechanical curve, the solid mesh lock mechanism often experiences abnormal states such as the mechanism being forced open or failing to lock, further impacting the simulation accuracy and stability. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a method for analyzing vehicle door switch performance. This method simplifies the modeling process, avoids tedious physical modeling, reduces modeling time and computing resource consumption, improves simulation efficiency, and accurately simulates the idle travel and mechanical effects of a vehicle door lock during engagement, thereby improving simulation accuracy.

[0005] The second object of the present invention is to provide a device for analyzing the door opening and closing performance.

[0006] A third object of the present invention is to provide a non-volatile readable storage medium.

[0007] In order to achieve the above-mentioned purpose, the method for analyzing the vehicle door switching performance of the first embodiment of the present invention includes: obtaining a model of the door lock engagement process of the vehicle door, wherein the model simulates the idle travel and mechanical effect of the door lock engagement through multiple connection units and an engagement force-displacement curve; and analyzing the switching fatigue characteristics of the vehicle door based on the model.

[0008] According to an embodiment of the present invention, a method for analyzing vehicle door opening and closing performance establishes a model of the door lock engagement process. This model utilizes multiple connection units and an engagement force-displacement curve to accurately simulate the lost travel and mechanical effects during the door lock engagement process. Compared to existing finite element solid mesh modeling methods, the present method eliminates the need for complex solid meshes in model construction. Instead, it simplifies the door lock engagement process into a series of one-dimensional connection units to achieve accurate simulation of the engagement process. The connection units in this model replace complex structures such as ratchets, pawls, and torsion springs, significantly simplifying the modeling process, effectively reducing modeling time and computing resources, and improving simulation efficiency. Furthermore, the connection units in the model accurately simulate each key aspect of the door lock mechanism, avoiding issues such as unit hourglassing and self-locking that often occur in solid modeling. Furthermore, by inputting a precise engagement force-displacement curve, the mechanical response during the simulated door lock engagement process is more realistic, avoiding contact force glitches and locking failures in lock engagement simulations, thereby improving simulation stability and accuracy.

[0009] In some embodiments, the model includes multiple connection units and the order in which the multiple connection units are arranged includes: a door mesh for describing the overall structure and geometry of the door, a door lock mass unit, a connection unit for simulating the idle travel of the door lock, a connection unit for simulating the mechanical effect of the door lock engagement, an inertia unit for dynamic analysis of the connection unit, and a side mesh for describing the structure and geometry of the side of the door.

[0010] In some embodiments, the connection unit simulating the idle travel of the door lock and the connection unit simulating the mechanical effect of the door lock engagement are both of the unit type Con3d2.

[0011] In some embodiments, the connection unit simulating the idle travel of the door lock and the connection unit simulating the mechanical action of the door lock engagement both define the direction of action through a local coordinate system, and the direction of action points from the door lock installation point to the side panel lock hook position.

[0012] In some embodiments, the parameter settings of the connection unit simulating the idle travel of the door lock include the following: The degree of freedom operation mode type is linear movement degree of freedom, and the ID number of the first local coordinate system is called; the upper and lower limits of the unit stroke and the direction of the locking action are set; and the behavior option parameters of the connection unit of the idle stroke simulating the door lock locking are set.

[0013] In some embodiments, the definition parameter settings of the connection unit that simulates the mechanical action of the door lock engagement include the following: the degree of freedom operation mode type is linear movement degree of freedom, and the ID number of the second local coordinate system is called; the behavior option parameters of the connection unit that simulates the mechanical action of the door lock engagement are set; and the behavior option parameters of the mechanical curve of the door lock engagement process are defined.

[0014] In some embodiments, the behavior option parameters defining the force curve of the door lock engagement process include a force-displacement curve of the door lock engagement process obtained through actual experimental testing.

[0015] In some embodiments, the calling direction of the local coordinate system is consistent with the force operation direction in the Con3d2.

[0016] In order to achieve the above-mentioned purpose, the vehicle door switch performance analysis device of the second embodiment of the present invention includes: at least one processor, the processor is configured with one-dimensional unit finite element simulation software, which is used to construct a model of the door lock engagement process of the vehicle door; a memory communicatively connected to the at least one processor; the memory stores a computer program that can be executed by the at least one processor, and when the at least one processor executes the computer program, it implements the vehicle door switch performance analysis method described in the above embodiment.

[0017] According to an embodiment of the present invention, a device for analyzing vehicle door switch performance, comprising at least one processor executing a computer program implementing the vehicle door switch performance analysis method described in the above embodiment, accurately simulates the idle travel and mechanical effects during the door lock engagement process based on a model of the door lock engagement process. This model utilizes multiple connection units and an engagement force-displacement curve. This model eliminates the need for a complex solid mesh and instead simplifies the door lock engagement process into a series of one-dimensional connection units, achieving accurate simulation of the engagement process. The connection units in this model replace complex structures such as ratchets, pawls, and torsion springs, significantly simplifying the modeling process, effectively reducing modeling time and computing resources, and improving simulation efficiency. Furthermore, the connection units in the model accurately simulate each key aspect of the door lock mechanism, avoiding issues such as unit hourglassing and self-locking that often occur in solid modeling. Furthermore, by inputting a precise engagement force-displacement curve, the mechanical response during the simulated door lock engagement process is more realistic, avoiding contact force glitches and locking failures in lock engagement simulations, thereby improving simulation stability and accuracy.

[0018] In order to achieve the above-mentioned purpose, the non-volatile readable storage medium of the third embodiment of the present invention stores a computer program thereon, and is characterized in that when the computer program is executed, the method for analyzing the vehicle door switch performance described in the above embodiment is implemented.

[0019] According to the non-volatile readable storage medium of the embodiment of the present invention, by adopting the analysis method of the vehicle door switch performance described in the above embodiment, the model building process is simplified, the tedious entity modeling process is avoided, the modeling time and computing resource consumption are reduced, the simulation efficiency is improved, and the idle travel and mechanical action of the vehicle door lock during the engagement process can be accurately simulated, thereby improving the simulation accuracy.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which: Figure 1 is a flow chart of a method for analyzing door switch performance according to one embodiment of the present invention; Figure 2 is a schematic diagram of the order in which a plurality of connection units are arranged according to one embodiment of the present invention; Figure 3 is a schematic diagram of setting parameters for a connection unit simulating an idle travel of a door lock according to an embodiment of the present invention; Figure 4 is a schematic diagram of setting parameters for a connection unit simulating the mechanical action of a door lock engagement according to an embodiment of the present invention; Figure 5 is a schematic diagram of the calling direction of the local coordinate system in the Con3d2 unit and the force operation direction in Con3d2 according to one embodiment of the present invention; Figure 6 FIG. 4 is a block diagram of a device for analyzing door switch performance according to an embodiment of the present invention.

[0022] Reference numerals: A device 100 for analyzing door opening and closing performance; Memory 101; processor 102. DETAILED DESCRIPTION

[0023] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0024] Reference below Figure 1 A method for analyzing door switch performance according to an embodiment of the present invention is described.

[0025] Figure 1 FIG. 1 is a flow chart of a method for analyzing door switch performance according to an embodiment of the present invention. Figure 1As shown, the method for analyzing the door switch performance includes at least steps S1-S2.

[0026] S1, obtaining a model of a door lock engagement process of a vehicle door, wherein the model simulates the idle travel and mechanical action of the door lock engagement through a plurality of connection units and an engagement force-displacement curve.

[0027] In some embodiments, a connector unit is a special unit in finite element analysis (FEA) that is used to simulate the interaction or motion relationship between two objects. During the door opening and closing simulation process, by using multiple connectors, the complex mechanical behavior of the door lock can be simplified into a more easily handled one-dimensional model, thereby reproducing the entire door lock opening and closing process in the simulation. Specifically, these connectors represent the various components of the door lock (such as ratchet, pawl, torsion spring, etc.) and their interactions, and are used to simulate the dynamic behavior of the door lock during the opening and closing process, such as the door lock's idle travel (movement when not in contact), the locked state of the lock body (position when locked), and the mechanical effects during the engagement process (such as the change in engagement force with displacement).

[0028] Therefore, the introduction of link elements simplifies the modeling process because they can replace complex solid mesh models, avoiding issues such as element hourglassing and self-locking that often occur in solid modeling. These elements can describe the behavior of the door lock through specific mechanical properties, effectively reducing modeling time and computing resource consumption, thereby improving simulation efficiency.

[0029] In some embodiments, a meshing force-displacement curve is used to describe the relationship between the force changes and the relative displacement of the door lock during the meshing process. This curve can be obtained through experimental measurement or theoretical calculation. By inputting this meshing force-displacement curve into the simulation model, the mechanical effects of the door lock during the meshing process can be more accurately simulated, avoiding contact force glitches and locking failures during meshing simulation, thereby improving the simulation stability and accuracy. This precise mechanical simulation is of great significance for analyzing the opening and closing fatigue characteristics of door locks and optimizing their design.

[0030] In embodiments of the present invention, idle travel refers to the motion of a door lock before it begins to engage. During this period, no engagement forces are generated between the door lock components. Simulating idle travel is crucial for simulating the actual motion of a vehicle door before engagement. Accurately simulating the motion of this idle travel ensures smooth pre-engagement movement and provides accurate initial conditions for subsequent mechanical analysis.

[0031] Therefore, idle travel is a crucial stage in the door closing process. Simulating idle travel ensures that the simulation model fully reproduces the entire door opening and closing process, ensuring that the motion state before the door lock engages is consistent with reality. If the idle travel stage is not correctly modeled, the door may not engage smoothly or may interfere with the actual closing process. Accurately simulating idle travel can prevent these problems and optimize the matching between the door and the lock body. Furthermore, simulating idle travel contributes to the accuracy of the overall simulation model, as it directly influences the subsequent analysis of the engagement force-displacement curve and the door's opening and closing fatigue characteristics.

[0032] S2, analyze the door opening and closing fatigue characteristics based on the model.

[0033] Specifically, after building a model of the door lock engagement process, dynamic simulation can be performed to simulate the door opening and closing process. This includes time-domain and frequency-domain analysis of the door lock's mechanical response to assess the stress and deformation experienced during repeated opening and closing. Fatigue analysis, using the simulation results, can calculate the door lock's fatigue life over long-term use. This analysis can reveal potential fatigue damage from repeated opening and closing, such as material fatigue, structural fatigue, or connection failure. Furthermore, based on the simulation results, the model can be validated to compare their consistency with actual test data. If deviations are detected, model accuracy can be improved by adjusting model parameters, optimizing the force-displacement curve, or refining the connection unit settings.

[0034] According to an embodiment of the present invention, a method for analyzing vehicle door opening and closing performance establishes a model of the door lock engagement process. This model utilizes multiple connection units and an engagement force-displacement curve to accurately simulate the lost travel and mechanical effects during the door lock engagement process. Compared to existing finite element solid mesh modeling methods, the present method eliminates the need for complex solid meshes in model construction. Instead, it simplifies the door lock engagement process into a series of one-dimensional connection units to achieve accurate simulation of the engagement process. The connection units in this model replace complex structures such as ratchets, pawls, and torsion springs, significantly simplifying the modeling process, effectively reducing modeling time and computing resources, and improving simulation efficiency. Furthermore, the connection units in the model accurately simulate each key aspect of the door lock mechanism, avoiding issues such as unit hourglassing and self-locking that often occur in solid modeling. Furthermore, by inputting a precise engagement force-displacement curve, the mechanical response during the simulated door lock engagement process is more realistic, avoiding contact force glitches and locking failures in lock engagement simulations, thereby improving simulation stability and accuracy.

[0035] In some embodiments, as Figure 2As shown, the model includes multiple connection units and the order in which the multiple connection units are arranged includes: a door mesh for describing the overall structure and geometry of the door, a door lock mass unit, a connection unit for simulating the idle travel of the door lock, a connection unit for simulating the mechanical effect of the door lock engagement, an inertia unit for dynamic analysis of the connection unit, and a side mesh for describing the structure and geometry of the side of the door.

[0036] The door mesh is a finite element mesh model used to simulate the overall door structure. By dividing the door's geometry into multiple small cells, these meshes accurately describe the door's structural characteristics and shape. The side panel mesh, on the other hand, is a finite element mesh model used to simulate the geometry and structural characteristics of the door's sides. Working in conjunction with the door mesh, the side panel mesh further refines the overall door geometry, particularly the shape and structural characteristics of the side panel area. The side panel mesh accurately reflects the interaction between the door and the vehicle's side, helping to analyze the side forces during door closing and their impact on the door's overall stability.

[0037] In some embodiments, the door lock mass unit can be a simulation unit used to simulate the actual mass and position of the door lock. By introducing the door lock mass unit into the simulation model, the inertial effect caused by the door lock's mass and its impact on the mechanical properties of the overall system during the opening and closing process can be more accurately reflected. The door lock mass unit can be modeled based on the actual weight of the door lock and properly connected to other components of the vehicle door so that it exhibits a realistic dynamic response in the simulation. For example, when the vehicle door is opened or closed, the door lock mass unit can affect the inertia, vibration characteristics, and force conditions of the vehicle door, thereby affecting the accuracy of the simulation results. If the door lock mass unit does not correctly consider the actual weight and position of the door lock, the simulation results may deviate from the actual situation, thereby affecting the analysis results of the mechanical characteristics.

[0038] In some embodiments, idle travel can be the motion process of a door lock without engagement force before engagement. By introducing a connection unit to simulate the idle travel of the door lock in the simulation, the movement behavior of the door lock from the beginning of movement to contact with the lock body can be effectively reproduced. Simulating the idle travel is important for accurately analyzing the initial movement state of the vehicle door and the subsequent engagement process between the door lock and the lock body. In practical applications, simulating the idle travel stage can help designers optimize the door lock structure, especially when adjusting the engagement point, to avoid potential poor engagement or interference. By accurately modeling and simulating the idle travel, the movement trajectory of the vehicle door before contact with the lock body can be ensured to be consistent with reality, thereby improving the accuracy of the overall model.

[0039] In some embodiments, a connection unit simulating the mechanical effects of door lock engagement can effectively simulate the forces and corresponding displacement changes experienced by the lock body during engagement by inputting a precise engagement force-displacement curve. This connection unit is specifically designed to reproduce the mechanical behavior of a door lock during engagement, including the contact force and displacement relationship between the lock body and the vehicle door. Simulating engagement force variations can help accurately analyze the forces acting on the door lock body and its interaction with the vehicle door, thereby evaluating the fatigue characteristics and performance of the door lock.

[0040] In some embodiments, inertia units are used to simulate the inertial characteristics exhibited by door locks during dynamic analysis. Inertia is a measure of an object's ability to maintain its state of motion, reflecting its tendency to resist acceleration or deceleration when subjected to external forces. By incorporating inertia units, simulation models can more realistically reflect the inertial response of door locks under various dynamic conditions, providing a more accurate description of their motion behavior.

[0041] In some embodiments, the inertia unit is pre-assigned an inertia value based on multiple experimental measurements. This value can be determined based on the mass distribution, shape, and kinematic characteristics of the door lock assembly. This unit helps more accurately reflect the model's response in dynamic simulations, particularly during repeated opening and closing cycles. It simulates the inertial effects of the door lock at different stages, significantly contributing to the accuracy of the entire simulation model.

[0042] In some embodiments, the connection unit that simulates the idle stroke of the door lock and the connection unit that simulates the mechanical action of the door lock engagement are both of the Con3d2 unit type. The Con3d2 unit is a connection unit used in three-dimensional space, which is essentially used to simulate the connection and interaction between two nodes. Although it is designed to describe the mechanical relationship in three-dimensional space, in certain specific application scenarios, such as the idle stroke and engagement process of the door lock, the use of the Con3d2 unit can be simplified to simulate linear motion on one-dimensional freedom. Through this simplification, the Con3d2 unit can effectively simulate the linear displacement and mechanical response between nodes, especially in the idle stroke stage and the meshing mechanical action. Compared with complex three-dimensional solid meshes, the use of Con3d2 units can significantly reduce the consumption of computing resources while maintaining accurate simulation of motion behavior. This method can more efficiently complete dynamic simulation and fatigue analysis without affecting the accuracy and reliability of the overall analysis.

[0043] In some embodiments, during the idle travel phase, there's no meshing force between the door and the lock body, only pure motion. In this case, the Con3d2 element can be used to simulate the door lock's motion from the moment it begins to contact the lock body. This element simulates the relative displacement and possible inertial effects of the door lock during the idle travel phase. This element allows the simulation to capture the initial kinematic characteristics of the door, providing accurate initial conditions for the subsequent engagement process.

[0044] In some embodiments, the Con3d2 element can also be used to describe the mechanical interaction between the door lock and the lock body during initial engagement. By inputting an engagement force-displacement curve, this element accurately simulates the force and displacement response of the door lock during engagement, analyzing the force and dynamic characteristics of the door lock. The Con3d2 element accurately transfers the actual mechanical characteristics of the door lock system to the simulation model, helping to evaluate the fatigue performance and durability of the door lock.

[0045] In some embodiments, the connection unit simulating the idle travel of the door lock and the connection unit simulating the mechanical action of the door lock engagement both define the action direction through the local coordinate system, and the action direction points from the door lock installation point to the side panel lock hook position.

[0046] The local coordinate system is defined relative to the global coordinate system based on the actual door-to-body mounting location and the specific door lock configuration. In this coordinate system, the door lock mounting point serves as a reference point, while the position of the lock hook (i.e., the side panel lock hook) serves as another reference point. Forces and displacements in the coordinate system are defined relative to these points. The local coordinate system can be used to describe the spatial relationship between the door lock and the side panel lock hook, a relationship that can change with door movement. By defining the direction of action in the local coordinate system, the simulation process can more accurately capture the interactions between connected elements, ensuring that the forces and displacements in the simulation always follow the actual direction of the door lock's motion.

[0047] In some embodiments, the idle travel phase occurs when the door lock and hook have not yet engaged, and no actual force is generated. During the engagement phase, however, the door lock and hook engage and begin to apply force. Defining the correct direction of action ensures precise transmission of the engagement force. By defining the direction of action for both connected units using a local coordinate system, the simulation can realistically reproduce the entire process from idle travel to engagement and analyze the changes in mechanical behavior during this process.

[0048] In some embodiments, the definition and parameter settings for the connection unit simulating the idle travel of a door lock include the following: setting the degree of freedom operating mode type to linear movement and calling the ID number of the first local coordinate system. Setting the upper and lower limits of the unit travel and the direction of the locking action. Setting the behavior option parameters for the connection unit simulating the idle travel of the door lock.

[0049] The idle travel can be the movement gap between the door and the side panel. The unit property of the connection unit that simulates the idle travel of the door lock is defined as Connector section, which means that the unit is used to describe the characteristics between the connected parts. The degree of freedom operation type of the connection unit is linear movement freedom (CARTESIAN), that is, the connection unit can only move linearly in one direction. This setting simulates that when the door lock is in the idle travel, its movement is carried out in a specific direction without other complex movement patterns. Therefore, the linear movement freedom allows the accurate simulation of the movement process of the door lock before engagement, which is crucial for analyzing the movement state in the idle travel stage.

[0050] In some embodiments, the first local coordinate system can be a coordinate system specifically used to simulate the door lock during its idle travel phase. This system defines the direction of freedom of the connecting unit, specifically the direction along which the connecting unit can move linearly during simulation. This facilitates accurate description of the direction and range of movement of the door lock before engagement during simulation. By using this system, the direction of movement of the connecting unit accurately aligns with the actual geometric relationship between the vehicle door and the lock hook.

[0051] In some embodiments, the ID number of the first local coordinate system is used as the unique identifier of the coordinate system. By calling the ID number, the linear movement freedom direction of the connection unit can be clearly determined, that is, the movement along the local direction of the first local coordinate system.

[0052] In some embodiments, the key words of the unit attributes of the connection unit simulating the idle travel of the door lock are:

[0053] ELSET specifies the set of elements to which this property applies, and BEHAVIOR specifies the behavior options for the connected elements.

[0054] like Figure 3 As shown, set the upper and lower limits of the unit travel. Specifically, LB_Rel_Pos represents the lower limit of the unit travel between the connection unit simulating the idle travel of the door lock and the connection unit simulating the mechanical action of the door lock engagement. UB_Rel_Pos represents the upper limit of the unit travel between the connection unit simulating the idle travel of the door lock and the connection unit simulating the mechanical action of the door lock engagement. LOCK represents the direction of the locking action in the first local coordinate system after the unit travel reaches the upper or lower limit. LOCK=ALL means that when the upper or lower limit is reached, all degrees of freedom are locked, that is, no degrees of freedom are active. These parameters are used to define the travel range and locking behavior of the connection unit to ensure the accuracy and stability of the simulation.

[0055] In some embodiments, as Figure 3 As shown, the keywords for the behavior option parameters of the connection unit that simulates the idle travel of the door lock are:

[0056] COMPONENT = 3 indicates that the linear motion of the link element (i.e., the direction of movement of the door lock before it engages) is along the longitudinal axis, -500.0 is the lower limit of the element travel between the link elements, and -0.5 is the upper limit of the element travel between the link elements. LOCK = ALL indicates that all degrees of freedom are locked when the element travel reaches the upper or lower limit.

[0057] In some embodiments, the definition parameters for the connection unit simulating the mechanical effects of door lock engagement include the following: setting the degree of freedom operating mode type to linear movement degrees of freedom and calling the ID number of the second local coordinate system. Setting the behavior option parameters for the connection unit simulating the mechanical effects of door lock engagement. Defining the behavior option parameters for the mechanical curve of the door lock engagement process.

[0058] The meshing force-displacement curve for the door's motion is defined, representing the mechanical effects of the door lock's engagement. The element properties for the connector element simulating the mechanical effects of the door lock engagement are defined as a Connector section, and the connector element's degrees of freedom are assigned a CARTESIAN operating mode. For the door lock engagement process, linear degrees of freedom are used to describe the lock's motion during the engagement phase. This simplification allows the simulation to accurately simulate the door lock's motion in a specific direction without having to calculate complex rotational or nonlinear motion. This allows the analysis to focus on the magnitude and distribution of the forces acting on the door lock during engagement.

[0059] In some embodiments, the second local coordinate system can be a coordinate system specifically used to simulate the door lock during the engagement force phase. This coordinate system defines the direction of motion and force during the engagement process, ensuring that the simulation accurately captures the transmission path and direction of the meshing force. By introducing this second local coordinate system, the mechanical behavior of the door lock during the engagement phase can be accurately simulated, ensuring that the simulated forces are always transmitted along the actual contact path. This is crucial for accurately describing the force characteristics during the engagement process, particularly when optimizing door lock design.

[0060] In some embodiments, the ID number of the second local coordinate system is used as a unique identifier for the coordinate system. By calling the ID number, the direction of the linear movement degree of freedom of the connecting unit simulating the mechanical action of the door lock engagement can be clearly determined, that is, the movement along the local direction of the second local coordinate system.

[0061] In some embodiments, the key words for the cell properties of the connection cell that simulates the mechanics of door lock engagement are:

[0062] ELSET specifies the set of elements to which this property applies, and BEHAVIOR specifies the behavior options for the connected elements. The purpose of these settings and parameters is to accurately simulate the mechanical effects of the door lock body during engagement, namely, the engagement force-displacement curve. By defining the behaviors and properties of these connected elements, the mechanical response of the door during engagement can be simulated, thereby evaluating the performance and durability of the door lock system.

[0063] In some embodiments, as Figure 4 As shown, the behavior option parameters that define the mechanical curve of the door lock engagement process include calling the force-displacement curve of the door lock engagement process tested in actual experiments. Among them, the force-displacement curve describes the change in the force acting between the door lock and the lock hook as the displacement of the lock body changes during the engagement process of the door lock and the lock hook. The force-displacement curve obtained through experiments not only includes the physical characteristics of the door lock, but also reflects the nonlinear characteristics of the force during the entire engagement process, embodies the mechanical effect of the door lock engagement process, and replaces the actual operation process of the ratchet and pawl mechanism. In simulation, if actual test data is not introduced, only theoretical models or hypothetical mechanical curves may be used, which will lead to a gap with the actual door lock engagement situation. Therefore, introducing the force-displacement curve of measured data can greatly improve the accuracy of the simulation and ensure that the analysis results are consistent with the force conditions during actual use.

[0064] In some embodiments, as Figure 4 As shown, the keywords for the behavior option parameters of the connection element that simulates the mechanical effects of door lock engagement are:

[0065] Among them, CONNECTOR ELASTICITY, COMPONENT = 2, which means that the direction of action of the force-displacement curve is the vertical axis direction of the second local coordinate system. The data of the force-displacement curve are given below, as shown in Table 1: Table 1 Data table of force-displacement curve

[0066] The Force column represents the tested door lock force, while the Rel_Disp column represents the tested displacement. These data points must be defined in a strictly ascending order to ensure simulation accuracy. The -500 and 0.2 values ​​in the keywords indicate the operating range of the curve displacement. If the displacement exceeds this range, the lock unit will be stuck, meaning it cannot move further.

[0067] In some embodiments, as Figure 5As shown, the direction of the local coordinate system aligns with the direction of force applied within Con3d2. Specifically, during simulation, to ensure accurate results, the local coordinate system defines the reference frame for the forces acting on the Con3d2 element. This is particularly true when analyzing door locking and meshing dynamics. For example, during door closing, the contact direction between the door lock and the side panel latch hook determines the direction of force applied. If the local coordinate system does not align with the actual force direction, the simulation may produce erroneous results.

[0068] In practical applications, the mechanical behavior of a door locking system is divided into multiple phases (such as idle travel and engagement). By defining a different local coordinate system and corresponding Con3d2 element action direction for each phase, we ensure consistent mechanical analysis across the system. This allows the simulation system to automatically adjust the coordinate system and force direction for each phase, resulting in a more accurate simulation of the entire locking process.

[0069] In some embodiments, as Figure 5 As shown, the model of the door lock engagement process operates as follows: During the door lock closing process, point A represents the operating position of the door end, and point B represents the engagement point of the side panel lock hook. These two points are key positions in the door lock's movement. As the door rotates, Con3d2 element AB is compressed. The period between point A and point B represents the period before the ratchet and pawl come into contact during door rotation. During this period, the door is not subject to force, and the Con3d2 element has no mechanical action. When point A reaches point B and coincides with point B, Con3d2 element AB locks with Con3d2 zero element B. At this stage, Con3d2 element AB and Con3d2 zero element B begin to move simultaneously, indicating that the door lock mechanism's pawl engages the ratchet limit position. After the door closes, the ratchet and pawl are still subject to force due to inertia. At this stage, the mechanical process runs according to the input force-displacement curve, which represents the force process of the door lock after the ratchet and pawl are locked together and the car door lock continues to bear the load.

[0070] During the actual door opening and closing process, from the moment the door lock begins to engage until the ratchet and pawl engage the limit position, the force on the door lock does not increase monotonically. Instead, it experiences brief mechanical oscillations, i.e., rising and falling forces. This mechanical oscillation is a characteristic of actual door lock operation. Therefore, the Con3d2 element can effectively simulate the actual operation of the door lock mechanism. This simulation more accurately reflects the mechanical behavior of the actual door lock mechanism during opening and closing, simulating the repeated collision and impact between the door mesh and the side panel mesh in a minimalist manner, reflecting the repeated oscillation effect after the door is locked.

[0071] Reference below Figure 6 A device for analyzing door switch performance according to an embodiment of the present invention will be described.

[0072] Figure 6 FIG. 1 is a block diagram of a device for analyzing door switch performance according to an embodiment of the present invention. Figure 6 As shown, the door switch performance analysis device 100 includes a memory 101 and at least one processor 102 .

[0073] In some embodiments, the at least one processor 102 may be one processor 102, or may be two processors 102, three processors 102, five processors 102, eight processors 102, ten processors 102, or other multiple processors 102. These processors 102 may be various types of general-purpose or special-purpose processors, such as embedded processors (e.g., ARM Cortex series processors), graphics processing units (GPUs), and the like.

[0074] In some embodiments, the processor 102 is configured with one-dimensional finite element simulation software for building a model of the door lock engagement process of the vehicle door.

[0075] In some embodiments, memory 101 can be random access memory (RAM), read-only memory (ROM), flash memory, a solid-state drive (SSD), or the like. The choice of memory 101 depends on the requirements and performance of processor 102, ensuring it can support real-time requirements and large-scale data processing. These memories 101 play a crucial role in storing and managing data, programs, and configuration information within the vehicle door switch performance analysis device 100, ensuring proper operation and data security.

[0076] In some embodiments, the memory 101 is in communication with at least one processor 102, and the memory 101 stores a computer program that can be executed by at least one processor 102. When the at least one processor 102 executes the computer program, the method for analyzing the door switch performance described in the above embodiment is implemented.

[0077] According to an embodiment of the present invention, a device 100 for analyzing vehicle door switch performance, comprising at least one processor 102 executing a computer program implementing the vehicle door switch performance analysis method described in the above embodiment, accurately simulates the idle travel and mechanical effects during the door lock engagement process based on a model of the vehicle door lock engagement process. This model utilizes multiple connection units and an engagement force-displacement curve. This model eliminates the need for a complex solid mesh and instead simplifies the door lock engagement process into a series of one-dimensional connection units, achieving accurate simulation of the engagement process. The connection units in this model replace complex structures such as ratchets, pawls, and torsion springs, significantly simplifying the modeling process, effectively reducing modeling time and computing resources, and improving simulation efficiency. Furthermore, the connection units in the model accurately simulate each key aspect of the door lock mechanism, avoiding issues such as unit hourglassing and self-locking that often occur in solid modeling. Furthermore, by inputting a precise engagement force-displacement curve, the mechanical response during the simulated door lock engagement process is more realistic, avoiding contact force glitches and locking failures during lock engagement simulation, thereby improving simulation stability and accuracy.

[0078] The present invention also provides a non-volatile readable storage medium having a computer program stored thereon. When executed, the computer program implements the vehicle door switch performance analysis method described in the above embodiment. The specific implementation process of the vehicle door switch performance analysis method can be referred to the description of the above embodiment.

[0079] In some embodiments, the non-volatile readable storage medium may include, but is not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0080] According to the non-volatile readable storage medium of the embodiment of the present invention, by adopting the analysis method of the vehicle door switch performance described in the above embodiment, the model building process is simplified, the tedious entity modeling process is avoided, the modeling time and computing resource consumption are reduced, the simulation efficiency is improved, and the idle travel and mechanical action of the vehicle door lock during the engagement process can be accurately simulated, thereby improving the simulation accuracy.

[0081] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0082] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A method for analyzing the performance of a vehicle door switch, characterized in that: include: Obtaining a model of a door lock engagement process of a vehicle door, wherein the model simulates an idle stroke and a mechanical effect of the door lock engagement through a plurality of connection units and an engagement force-displacement curve; The opening and closing fatigue characteristics of the vehicle door are analyzed based on the model.

2. The analysis method according to claim 1, characterized in that The model includes multiple connection units and the order in which the multiple connection units are arranged includes: a door mesh for describing the overall structure and geometry of the door, a door lock mass unit, a connection unit for simulating the idle travel of the door lock, a connection unit for simulating the mechanical effect of the door lock engagement, an inertia unit for dynamic analysis of the connection unit, and a side mesh for describing the structure and geometry of the side of the door.

3. The analysis method according to claim 2, characterized in that The connection unit simulating the idle travel of the door lock and the connection unit simulating the mechanical effect of the door lock engagement are both of the unit type Con3d2.

4. The analysis method according to claim 2, characterized in that The connecting unit simulating the idle travel of the door lock and the connecting unit simulating the mechanical action of the door lock engagement both define the action direction through a local coordinate system, and the action direction points from the door lock installation point to the side panel lock hook position.

5. The analysis method according to claim 2, characterized in that The definition parameter settings of the connection unit simulating the idle travel of the door lock include the following: The freedom operation mode type is linear movement freedom, and the ID number of the first local coordinate system is called; Set the upper and lower limits of the unit travel and the direction of the locking action; Set the behavior option parameters of the connection unit that simulates the idle travel of the door lock.

6. The analysis method according to claim 2, characterized in that The definition parameter settings of the connection unit simulating the mechanical action of the door lock engagement include the following: The freedom operation mode type is linear movement freedom, and the ID number of the second local coordinate system is called; Setting behavior option parameters of the connection unit simulating the mechanical action of door lock engagement; Behavior option parameters that define the force profile of the door lock engagement process.

7. The analysis method according to claim 6, characterized in that The behavior option parameters defining the mechanical curve of the door lock engagement process include calling the force-displacement curve of the door lock engagement process tested in actual experiments.

8. The analysis method according to claim 4, characterized in that The calling direction of the local coordinate system is consistent with the force operation direction in Con3d2.

9. A door switch performance analysis device, characterized in that: include: at least one processor configured with one-dimensional unit finite element simulation software for constructing a model of a door lock engagement process of a vehicle door; a memory communicatively coupled to the at least one processor; The memory stores a computer program that can be executed by the at least one processor, and when the at least one processor executes the computer program, the method for analyzing the door switch performance according to any one of claims 1 to 8 is implemented.

10. A non-volatile readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the method for analyzing the door switch performance according to any one of claims 1 to 8 is implemented.

Images