A car coupler force calibration method and a car coupler force calibration device

Abstract

The application provides a car coupler force calibration method and device. The method comprises: obtaining a cantilever beam simulation model, the cantilever beam simulation model comprising a first car coupler and a second car coupler in a coupled state, wherein the coupled end of the first car coupler is arranged as a simply supported constraint, the tail of the first car coupler is arranged as a fixed support constraint, the coupled end of the second car coupler is arranged as a simply supported constraint, and the tail of the second car coupler is arranged as a fixed support constraint; applying a transverse load at a preset position on the first car coupler; determining the support reaction force at the coupled end of the first car coupler under the action of the transverse load to construct a calibration relationship for characterizing the transverse load at the preset position and the support reaction force of the coupled end of the first car coupler, the support reaction force of the coupled end of the first car coupler being the transverse force transmitted from the first car coupler to the second car coupler. Through the application, the accuracy of transverse load transmission calculation is improved.

Description

Technical Field

[0001] This application relates to the field of rail vehicle technology, and more specifically, to a method and device for calibrating coupler force. Background Technology

[0002] Currently, in the rail transit sector, the coupler of heavy-duty freight cars is a critical component connecting adjacent vehicles, and its load-bearing capacity directly affects train operation safety. During the production and maintenance of couplers, their load transfer performance needs to be evaluated experimentally. Traditional calibration methods often rely on empirical formulas or simplified models, failing to fully consider the constraints after coupler coupling (such as simply supported / fixed supported mixed constraints), resulting in significant errors in load transfer calculations and making it difficult to meet the high-precision data acquisition requirements under heavy-load conditions.

[0003] Furthermore, current technologies for evaluating the mechanical performance of train couplers primarily focus on the measurement and analysis of longitudinal forces, while measurements of lateral and vertical forces are relatively scarce. However, in high-speed, heavy-load railway transportation, the lateral and vertical forces of the coupler also significantly impact train operational safety. The lack of effective monitoring of lateral forces poses a potential threat to the safety of heavy-haul train operations. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a coupler force calibration method and a coupler force calibration device to overcome at least one of the above-mentioned defects.

[0005] In a first aspect, embodiments of this application provide a method for calibrating coupler force. The method includes: acquiring a cantilever beam simulation model, the cantilever beam simulation model including a first coupler and a second coupler in a coupled state, wherein the coupling end of the first coupler is set as a simply supported constraint, the tail of the first coupler is set as a fixed support constraint, the coupling end of the second coupler is set as a simply supported constraint, and the tail of the second coupler is set as a fixed support constraint. The simply supported constraint means that the coupling end of the corresponding coupler can rotate freely but restricts the vertical displacement of the coupling end of the corresponding coupler, and the fixed support constraint simultaneously restricts the vertical displacement and rotation angle of the tail of the corresponding coupler; applying a lateral load at a preset position on the first coupler; determining the support reaction force at the coupling end of the first coupler under the action of the lateral load, so as to construct a calibration relationship for characterizing the lateral load at the preset position and the support reaction force at the coupling end of the first coupler, wherein the support reaction force at the coupling end of the first coupler is the lateral force transmitted from the first coupler to the second coupler.

[0006] In one optional embodiment of this application, the calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is constructed in the following manner: The deflection function and rotation angle function of the tail of the first coupler are obtained. The deflection function characterizes the vertical displacement of the tail of the first coupler relative to the original axis, and the rotation angle function characterizes the angle between the tangent at the tail of the first coupler and the original axis. Based on a first boundary condition, the rotation angle function is substituted to obtain an expression for a first preset parameter, which is determined by the fixed support constraint at the tail of the first coupler. The expression for the first preset parameter is substituted into the deflection function to obtain the calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler.

[0007] In one optional embodiment of this application, the deflection function and rotation angle function of the tail of the first coupler are represented in the following manner:

[0008]

[0009] in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI The bending stiffness of the beam reflects the coupler's ability to resist bending deformation, w2( l ) is the deflection function, θ2( l Let R be the rotation angle function. A The support reaction force at the coupling end of the first coupler, Let F be the total length of the first coupler, and F be the lateral load applied at a predetermined position on the first coupler. b is the distance from the preset position on the first coupler to the tail of the first coupler, and D1 is the first preset parameter.

[0010] In one optional embodiment of this application, the deflection function and rotation angle function of the tail of the first coupler are obtained by: obtaining a first bending moment equation between the tail of the first coupler and a preset position of the first coupler; integrating the first bending moment equation to obtain a first rotation angle equation between the tail of the first coupler and the preset position of the first coupler; integrating the first rotation angle equation to obtain a first deflection equation; and, according to a second boundary condition, substituting the first deflection equation and the second deflection equation to determine the integration constant, thereby determining the deflection function and rotation angle function of the tail of the first coupler. The second boundary condition is used to characterize that at the preset position of the first coupler, the second deflection equation between the coupling end of the first coupler and the preset position of the first coupler is equal to the first deflection equation between the preset position of the first coupler and the tail of the first coupler, and the rotation angle is continuous.

[0011] In one optional embodiment of this application, the second deflection equation is determined by: obtaining a second bending moment equation between the coupling end of the first coupler and a preset position of the first coupler; integrating the second bending moment equation to obtain a second rotation angle equation between the coupling end of the first coupler and the preset position of the first coupler; integrating the second rotation angle equation to obtain a second deflection equation, wherein the second deflection equation is used to describe the deflection distribution between the coupling end of the first coupler and the preset position of the first coupler.

[0012] In one optional embodiment of this application, the calibration relationship between the lateral load at the preset position and the support reaction force at the coupling end of the first coupler is expressed by the following formula:

[0013] Among them, R A Let F be the support reaction force at the coupling end of the first coupler, and let F be the lateral load applied at a predetermined position on the first coupler. l denoted as the total length of the first coupler, and b is the distance from a preset position on the first coupler to the tail of the first coupler.

[0014] In one optional embodiment of this application, the first deflection equation is represented by the following formula:

[0015] in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI Let w2(x) be the bending stiffness of the beam, reflecting the coupler's ability to resist bending deformation, and w2(x) be the vertical displacement of the coupler at position x relative to the original axis. R A The support reaction force at the coupling end of the first coupler, F Let be the lateral load applied at a preset position on the first coupler, 'a' be the distance from the preset position on the first coupler to the coupling end of the first coupler, 'D1' be a first preset parameter, and 'D2' be a second preset parameter.

[0016] Secondly, this application also provides a coupler force calibration device, the device comprising: a cantilever beam simulation model acquisition module, used to acquire a cantilever beam simulation model, the cantilever beam simulation model including a first coupler and a second coupler in a coupled state, wherein the coupling end of the first coupler is set as a simply supported constraint, the tail of the first coupler is set as a fixed support constraint, the coupling end of the second coupler is set as a simply supported constraint, and the tail of the second coupler is set as a fixed support constraint, the simply supported constraint means that the coupling end of the corresponding coupler can rotate freely but restricts the vertical displacement of the coupling end of the corresponding coupler, the fixed support constraint simultaneously restricts the vertical displacement and rotation angle of the tail of the corresponding coupler; a lateral load application module, used to apply a lateral load at a preset position on the first coupler; and a calibration relationship determination module, used to determine the support reaction force at the coupling end of the first coupler under the action of the lateral load, so as to construct a calibration relationship characterizing the lateral load at the preset position and the support reaction force at the coupling end of the first coupler, the support reaction force at the coupling end of the first coupler being the lateral force transmitted from the first coupler to the second coupler.

[0017] Thirdly, embodiments of this application also provide an electronic device, including: a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory via the bus, and when the machine-readable instructions are executed by the processor, the steps of the method described above are performed.

[0018] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of the method described above.

[0019] The coupler force calibration method and device provided in this application obtain a cantilever beam simulation model, which includes a first coupler and a second coupler in a coupled state. The coupling end of the first coupler is set as simply supported, and the tail end of the first coupler is set as fixed. The coupling end of the second coupler is set as simply supported, and the tail end of the second coupler is set as fixed. A lateral load is applied at a predetermined position on the first coupler. The support reaction force at the coupling end of the first coupler under the lateral load is determined to construct a calibration relationship characterizing the lateral load at the predetermined position and the support reaction force at the coupling end of the first coupler. The support reaction force at the coupling end of the first coupler is the lateral force transmitted from the first coupler to the second coupler. This application improves the accuracy of load transfer calculation.

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is one of the flowcharts for the coupler force calibration method provided in the embodiments of this application; Figure 2 A schematic diagram of the structure for coupler calibration of the cantilever beam simulation model provided in the embodiments of this application; Figure 3 A flowchart illustrating the process of obtaining the deflection function and rotation angle function of the tail of the first coupler, as provided in an embodiment of this application. Figure 4 A flowchart for determining the second deflection equation provided in an embodiment of this application; Figure 5 This is a second flowchart of the coupler force calibration method provided in the embodiments of this application; Figure 6 A schematic diagram of the structure for coupler calibration of the three-point bending beam model provided in the embodiments of this application; Figure 7 A flowchart illustrating the first calibration relationship between the vertical load and the tail support reaction force of the first coupler provided in an embodiment of this application; Figure 8 A flowchart illustrating the second calibration relationship between the vertical load and the tail support reaction force of the second coupler provided in an embodiment of this application; Figure 9 This is a schematic diagram of the coupler force calibration device provided in the embodiments of this application; Figure 10 The present application provides a schematic diagram of the structure of an electronic device. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. Based on the embodiments of this application, every other embodiment obtained by those skilled in the art without inventive effort falls within the scope of protection of this application.

[0024] First, the applicable scenarios for this application will be introduced. This application can be applied to the field of rail vehicle technology.

[0025] Research has revealed that in the rail transit sector, the coupler of heavy-duty freight cars, as a key component connecting adjacent vehicles, is crucial to train operation safety due to its load-bearing capacity. However, traditional calibration methods rely on empirical formulas or simplified models, failing to fully consider the simply supported-fixed mixed constraint conditions after coupler coupling. This results in large errors in load transfer calculations, making it difficult to meet the high-precision data acquisition requirements of heavy-duty conditions. Furthermore, existing technologies primarily focus on longitudinal force measurement of couplers, while lateral and vertical force measurements are relatively scarce. The lateral force of couplers has a significant impact on the operational safety of high-speed, heavy-duty trains, and the lack of effective monitoring poses a potential threat.

[0026] Based on this, the present application provides a coupler force calibration method and a coupler force calibration device. By constructing a cantilever beam simulation model of a coupled coupler with a simple-supported-fixed-supported mixed constraint, a lateral load is applied at a preset position of the first coupler, and its coupled end support reaction force is determined. Then, the calibration relationship between the lateral load and the support reaction force is established, so as to realize the accurate quantification of the lateral force transmission of the coupler and effectively improve the accuracy of the load transmission calculation.

[0027] Please see Figure 1 , Figure 1 This is a flowchart illustrating the coupler force calibration method provided in an embodiment of this application. Figure 1 As shown in the embodiments of this application, the coupler force calibration method includes: S101. Obtain the simulation model of the cantilever beam.

[0028] The cantilever beam simulation model includes a first coupler and a second coupler in a coupled state. The coupling end of the first coupler is set as simply supported, and the tail of the first coupler is set as fixed. The coupling end of the second coupler is set as simply supported, and the tail of the second coupler is set as fixed. A simply supported constraint means that the coupling end of the corresponding coupler can rotate freely, but the vertical displacement of the coupling end of the corresponding coupler is restricted. A fixed constraint restricts both the vertical displacement and the rotation angle of the tail of the corresponding coupler.

[0029] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure for coupler calibration of the cantilever beam simulation model provided in this application embodiment.

[0030] like Figure 2 As shown, 1 on the right indicates that segment AB is the first coupler, and 2 on the left indicates that segment ED is the second coupler. The cantilever beam simulation model includes the first coupler and the second coupler, which are connected by coupling ends (points A and D) to form an integral structure.

[0031] The coupling end of the first coupler (point A) is set as a simply supported constraint (allowing free rotation but restricting vertical displacement), and the tail of the first coupler (point B) is set as a fixed constraint (restricting both vertical displacement and rotation angle). The coupling end of the second coupler (point D) is set as a simply supported constraint, and the tail of the first coupler (point E) is set as a fixed constraint. A lateral load F is applied at a preset position (point C) of the first coupler, where a is the distance from the preset position on the first coupler to the coupling end of the first coupler (segment AC), and b is the distance from the preset position on the first coupler to the tail of the first coupler (segment CB).

[0032] S102. Apply a lateral load at a predetermined position on the first coupler.

[0033] In this step, a lateral load F is applied at a predetermined position (point C) of the first coupler to simulate lateral impact or force under actual working conditions; the model parameters include the coupler length. l The distance b from the preset position (point C) of the first coupler to the tail B of the first coupler, and the distance a from the tail E of the second coupler (satisfying a+b=2) l ).

[0034] Here, this application uses a hybrid constraint condition of simply supported and fixed supports to accurately simulate the actual boundary state after the coupler coupling, solving the calculation error problem caused by neglecting constraint conditions in traditional methods, and quantifying the reaction force R of the coupling end support of the lateral load F and the first coupler. A The calibration relationship is used to clarify the transmission law of lateral force from the first coupler to the second coupler.

[0035] S103. Determine the support reaction force at the coupling end of the first coupler under the action of lateral load, so as to construct a calibration relationship to characterize the lateral load at the preset position and the support reaction force at the coupling end of the first coupler.

[0036] The support reaction force at the coupling end of the first coupler is the lateral force transmitted from the first coupler to the second coupler.

[0037] Through theoretical derivation or experimental measurement, the coupling end support reaction force R of the lateral load F (applied at a preset position on the first coupler) and the first coupler is established. A The mathematical relationship is clarified to define the transmission law of lateral force from the first coupler to the second coupler, providing a high-precision calibration basis for the evaluation of coupler mechanical performance.

[0038] Specifically, the calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is established in the following manner: First, establish the equilibrium equations:

[0039]

[0040] Among them, F Y For the resultant force of the coupler, R A R is the support reaction force at the coupling end of the first coupler. B The reaction force at the tail of the first coupler is F, which is the lateral load applied at a predetermined position on the first coupler, and M is... A M is the bending moment at the coupling end of the first coupler. B The bending moment at the tail of the first coupler. l Let be the total length of the first coupler, and 'a' be the distance from the preset position on the first coupler to the coupling end of the first coupler.

[0041] The boundary conditions for the cantilever beam model include: First boundary condition: The deflection and rotation angle at end B are both 0 (w2(l)=0, θ2(l)=0); Second boundary condition: The deflection and rotation angle at the load application point C are continuous (w1(a) = w2(a), θ1(a) = θ2(a)); Third boundary condition: The deflection at end A is 0 (w1(0)=0).

[0042] Boundary conditions: Simply supported end: Since the simply supported end can rotate freely without any additional torque to constrain its rotation, the specific value of the rotation angle cannot be determined, and the rotation angle is the quantity to be determined; while the vertical displacement is restricted to 0, this condition can be used to determine the integration constant, thereby solving the deflection and rotation angle equations of the beam.

[0043] Fixed supports: Fixed supports restrict the rotation of the beam, meaning that the slope of the deflection curve (i.e., the rotation angle θ) at that point is 0; they also restrict the vertical displacement of the beam, i.e., the deflection w is 0. These two conditions work together to determine the two integration constants generated during the integration process, thereby obtaining the precise expressions for the beam's deflection and rotation angle, and further solving for the beam's internal forces and deformation.

[0044] Specifically, please refer to Figure 3 , Figure 3 The flowchart provided in this application embodiment shows how to obtain the deflection function and rotation angle function of the tail of the first coupler. The deflection function and rotation angle function of the tail of the first coupler are obtained in the following way: S301. Obtain the first bending moment equation between the tail of the first coupler and the preset position of the first coupler; Here, the equation for the first bending moment between the tail of the first coupler and the preset position of the first coupler is CB segment (a≤x≤ l M1(x) = R A xF(xa).

[0045] Where M1(x) is the first bending moment equation applicable to the CB segment of the first coupler, that is, the interval from the preset position C of the first coupler to the tail B of the first coupler, R A Let a be the support reaction force at the coupling end of the first coupler, and let x be the distance from the tail of the first coupler (point B) along the coupler axis (horizontal direction) to the target section, where a ≤ x ≤ l 'a' represents the distance from the preset position on the first coupler to the coupling end of the first coupler. l This is the total length of the first coupler.

[0046] S302. Integrate the first bending moment equation to obtain the first turning angle equation between the tail of the first coupler and the preset position of the first coupler. The equation for the first turning angle is expressed by the following formula:

[0047] in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI Let θ2(x) be the bending stiffness of the beam, reflecting the coupler's ability to resist bending deformation. Let θ2(x) be the rotation angle at a section on the CB segment of the coupler at a horizontal distance x from point B at the tail of the first coupler. Let R be the bending stiffness of the beam. A The support reaction force at the coupling end of the first coupler, F The lateral load applied at a preset position on the first coupler is denoted by 'a', where 'a' is the distance from the preset position on the first coupler to the coupling end of the first coupler, and 'D1' is a first preset parameter.

[0048] The above formulas can be used to calculate the rotation angle of the coupler at different positions, thereby assessing the deformation of the coupler. Combined with the bending moment formula, the stress distribution of the coupler can also be analyzed, providing a theoretical basis for the design, strength verification and fatigue analysis of the coupler, and ensuring that the coupler can work safely and reliably during train operation.

[0049] S303. Integrate the first angle equation to obtain the first deflection equation; Specifically, the first deflection equation is expressed by the following formula:

[0050] in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI Let w2(x) be the bending stiffness of the beam, reflecting the coupler's ability to resist bending deformation, and w2(x) be the vertical displacement of the first coupler at position x relative to the original axis. R A The support reaction force at the coupling end of the first coupler, F The lateral load applied at a preset position on the first coupler is denoted as a, where a is the distance from the preset position on the first coupler to the coupling end of the first coupler, D1 is the first preset parameter, and D2 is the second preset parameter.

[0051] S304. Based on the second boundary conditions, substitute the first deflection equation and the second deflection equation to determine the integration constant, so as to determine the deflection function and rotation angle function of the tail of the first coupler.

[0052] Specifically, please refer to Figure 4 , Figure 4 The flowchart for determining the second deflection equation provided in this application embodiment determines the second deflection equation in the following manner: S401. Obtain the second bending moment equation between the coupling end of the first coupler and the preset position of the first coupler; Here, the equation for the second bending moment between the coupling end of the first coupler and the preset position of the first coupler is for segment AC (0≤x≤a): M2(x)=R A x.

[0053] Where M2(x) is the second bending moment equation applicable to the AC segment of the first coupler, that is, the interval from the preset position C of the first coupler to the coupling end A, R A Let x be the support reaction force at the coupling end of the first coupler, and let x be the distance from the coupling end (point A) of the first coupler along the coupler axis (horizontal direction) to the target section.

[0054] S402. Integrate the second bending moment equation to obtain the second rotation angle equation between the coupling end of the first coupler and the preset position of the first coupler; The equation for the second turning angle is expressed by the following formula:

[0055] in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI Let θ1(x) be the bending stiffness of the beam, reflecting the coupler's ability to resist bending deformation. Let θ1(x) be the rotation angle at a section on segment AC of the coupler, at a horizontal distance x from the coupling end A of the first coupler. R A C1 is the support reaction force at the coupling end of the first coupler, and C1 is the integration constant.

[0056] S403. Integrate the second angle equation to obtain the second deflection equation.

[0057] The second deflection equation is used to describe the deflection distribution between the coupling end of the first coupler and the preset position of the first coupler.

[0058] Specifically, the second deflection equation is expressed by the following formula:

[0059] in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI Let w1(x) be the bending stiffness of the beam, reflecting the coupler's ability to resist bending deformation, and w1(x) be the vertical displacement of the first coupler at position x relative to the original axis. R A C1 is the support reaction force at the coupling end of the first coupler, C2 is the first integral constant, and C2 is the second integral constant.

[0060] According to the third boundary condition, the deflection at end A is 0, i.e., w1(0)=0, so C2=0.

[0061] The second boundary condition is used to characterize that at the preset position of the first coupler, the second deflection equation between the coupling end of the first coupler and the preset position of the first coupler is equal to the first deflection equation between the preset position of the first coupler and the tail of the first coupler, and the rotation angle is continuous.

[0062] Here, at the preset position C (x=a), the beam deflection must be continuous, that is, the deflection values ​​of the left segment AC (0≤x≤a) and the right segment CB (a≤x≤l) are equal. The second boundary conditions are w1(a)= w2(a) and θ1(a)=θ2(a), so C1= D1.

[0063] The calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is established in the following manner: Obtain the deflection function and rotation angle function of the tail of the first coupler.

[0064] The deflection function is used to characterize the vertical displacement of the tail of the first coupler relative to the original axis, and the rotation angle function is used to characterize the angle between the tangent at the tail of the first coupler and the original axis. The deflection function and rotation angle function of the tail of the first coupler are represented as follows:

[0065]

[0066] in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI The bending stiffness of the beam reflects the coupler's ability to resist bending deformation, w2( l ) is the deflection function, θ2( l R is the rotation angle function. A The support reaction force at the coupling end of the first coupler, Let F be the total length of the first coupler, and F be the lateral load applied at a predetermined position on the first coupler. b is the distance from the preset position on the first coupler to the tail of the first coupler, and D1 is the first preset parameter.

[0067] Based on the first boundary condition, the angle function is substituted to obtain the expression for the first preset parameter. The first boundary condition is determined by the fixed support constraint at the tail of the first coupler. Here, the first boundary condition is that the deflection and rotation angle at the tail of the first coupler are both 0 (i.e., x = l At that time, w2( l )=0,θ2( l =0).

[0068] The expression for the first preset parameter is as follows:

[0069] Where D1 is the first preset parameter, R A The support reaction force at the coupling end of the first coupler, Let F be the total length of the first coupler, and F be the lateral load applied at a predetermined position on the first coupler. b is the distance from the preset position on the first coupler to the tail of the first coupler.

[0070] Substituting the expression of the first preset parameter into the deflection function, the calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is obtained.

[0071] The calibration relationship between the lateral load at the preset position and the support reaction force at the coupling end of the first coupler is expressed by the following formula:

[0072] Among them, R A Let F be the support reaction force at the coupling end of the first coupler, and let F be the lateral load applied at a preset position on the first coupler. l denoted as , where b is the total length of the first coupler, and b is the distance from the preset position on the first coupler to the tail of the first coupler.

[0073] Specifically, similar to the reaction force at the coupling end of the first coupler mentioned above, the calibration relationship between the lateral load at the preset position and the reaction force at the tail of the first coupler can be expressed by the following formula:

[0074] Among them, R B Let F be the reaction force at the tail of the first coupler, and let F be the lateral load applied at a predetermined position on the first coupler. l Let be the total length of the first coupler, and 'a' be the distance from the preset position on the first coupler to the coupling end of the first coupler.

[0075] This application provides a coupler force calibration method and device. The method includes: acquiring a cantilever beam simulation model, which includes a first coupler and a second coupler in a coupled state. The coupling end of the first coupler is set as simply supported, and the tail end of the first coupler is set as fixed. The coupling end of the second coupler is set as simply supported, and the tail end of the second coupler is set as fixed. A lateral load is applied at a predetermined position on the first coupler. The support reaction force at the coupling end of the first coupler under the lateral load is determined to construct a calibration relationship characterizing the lateral load at the predetermined position and the support reaction force at the coupling end of the first coupler. The support reaction force at the coupling end of the first coupler is the lateral force transmitted from the first coupler to the second coupler. This application improves the accuracy of load transfer calculations.

[0076] This application relates to the field of testing and inspection technology for rail vehicle components. The method simplifies both the first and second couplers after coupling into beam structures with one simply supported end and one fixed end. End A of the first coupler is the coupling end with the second coupler (simply supported constraint), and end B is the tail end of the coupler (fixed support constraint). By applying a static load at a predetermined position on the first coupler, the load transferred from the first coupler to the second coupler is calculated based on a beam theory model of materials mechanics, achieving static load calibration under coupler coupling conditions. This application improves the accuracy of load transfer calculations and provides theoretical support for the fabrication of high-precision three-dimensional force-measuring couplers.

[0077] In an optional embodiment, this application also includes a vertical force calibration method. This application also provides a coupler force calibration method and a coupler force calibration device, which obtains a three-point bending beam model to characterize the beam structure formed by the direct connection of the coupling ends of the two couplers in the coupled state, simplifies the tails of the two couplers to fixed support constraints that simultaneously restrict vertical displacement and rotation angle, applies a vertical load at a preset position of the first coupler, and constructs a calibration relationship between the vertical load and the support reaction force by determining the support reaction force of the tail of the target coupler (first coupler or second coupler) under the action of the vertical load, so as to clarify the vertical force transmission law.

[0078] Please see Figure 5 , Figure 5 This is a second flowchart of the coupler force calibration method provided in the embodiments of this application. Figure 5 As shown in the embodiments of this application, the coupler force calibration method includes: S501. Obtain the three-point bending beam model.

[0079] The three-point bending beam model is used to characterize the beam structure formed by the direct connection between the coupling ends of the first coupler and the coupling ends of the second coupler in the coupled state. The tail of the first coupler is simplified as a fixed support constraint, and the tail of the second coupler is also simplified as a fixed support constraint. The fixed support constraint simultaneously restricts the vertical displacement and rotation angle of the tail of the corresponding coupler.

[0080] When a three-point bending beam model is used to characterize the coupler structure under coupled conditions, the three points typically include two points where the coupler tail support reaction force acts (equivalent to the support points of a simply supported beam) and one point where the vertical load is applied.

[0081] Under vertical load, the beam structure will bend, and the coupling ends will also rotate. According to the deformation compatibility relationship, the rotation angle at the coupling end of the first coupler is equal to the rotation angle at the coupling end of the second coupler. The magnitude of the rotation angle depends on factors such as the load magnitude, beam stiffness, and support conditions. For example, when the vertical load increases, the rotation angle at the coupling ends will also increase accordingly.

[0082] The direction of the rotation is related to the bending direction of the beam. If the vertical load is downward, the beam bends downward, and the coupling end will produce a clockwise or counterclockwise rotation, the specific direction of which depends on the model's coordinate settings and the location of the loading point.

[0083] This model characterizes the beam structure formed by the direct connection of the coupling ends of the first coupler and the second coupler in a coupled state. It simplifies the complex coupler connection structure into a beam structure similar to that in a standard three-point bending test, facilitating mechanical analysis and calculation.

[0084] The movement of the coupling end is part of the overall stress and deformation of the coupler. It transmits the vertical load at the loading point to the two couplers and then to the supporting structure through the point of application of the support reaction force at the tail of the coupler. The displacement and rotation changes of the coupling end reflect the transmission and distribution of the load in the coupler.

[0085] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure for coupler calibration of the three-point bending beam model provided in the embodiments of this application.

[0086] like Figure 6 As shown, 1 on the right indicates that segment AB is the first coupler, and 2 on the left indicates that segment ED is the second coupler. The three-point bending beam model includes the first coupler and the second coupler, which are connected by coupling ends (points A and D) to form an integral structure.

[0087] The tail of the first coupler (point B) is set as a fixed support constraint (simultaneously restricting vertical displacement and rotation angle); the tail of the first coupler (point E) is set as a fixed support constraint, and a vertical load F is applied at the preset position (point C) of the first coupler, where a is the distance from the preset position on the first coupler to the tail of the second coupler (segment CE), and b is the distance from the preset position on the first coupler to the tail of the first coupler (segment CB).

[0088] S502, Apply a vertical load at a predetermined position on the first coupler.

[0089] In this step, based on the actual stress conditions of the coupler and the research focus, a representative position on the first coupler is selected as the preset position. For example, considering that the coupler tongue is one of the main stress areas when the coupler connects to the train, a certain point on the coupler tongue can be selected as the preset position; alternatively, by combining methods such as finite element analysis, the stress conditions at different positions can be simulated to identify areas of stress concentration or stress sensitivity to determine the preset position.

[0090] Specialized loading equipment, such as hydraulic loading devices or mechanical loaders, is used to apply a vertical load at a predetermined location. During loading, the magnitude, direction, and loading rate of the load can be precisely controlled by a control system. To simulate actual working conditions, the load magnitude can be set according to the actual stress conditions experienced by the train during operation, such as the train's weight, speed, and track conditions. By applying a vertical load at a preset position, the vertical force acting on the coupler during actual operation can be simulated, providing a basis for subsequent analysis of the coupler's mechanical properties. It can also be used to study the deformation and stress distribution of the coupler under different vertical loads, providing data support for coupler design optimization and strength assessment.

[0091] S503. Determine the support reaction force at the tail of the target coupler under the action of vertical load, so as to establish the calibration relationship between the vertical load and the support reaction force at the tail of the target coupler.

[0092] The reaction force at the tail of the target coupler is the vertical force transmitted from the first coupler at a preset position to the tail of the target coupler. The target coupler is one of the first coupler and the second coupler.

[0093] The calibration relationship established in this application can clearly reveal the transmission law of vertical load between the coupler. Through this relationship, it can be known how much support reaction force will be subjected to the tail of the target coupler under a given vertical load, thereby understanding the mechanical behavior of the coupler during the force process.

[0094] Based on the calibration relationship, the structure and parameters of the coupler can be optimized. For example, if the support reaction force is found to be too large, it may be necessary to strengthen the structural strength of the coupler tail; if the distribution of the support reaction force is uneven, the connection method or structural design of the coupler can be adjusted to improve the load-bearing capacity and stability of the coupler.

[0095] Furthermore, accurately understanding the calibration relationship between vertical load and support reaction force helps in evaluating the performance of the coupler in actual operation. It allows for prediction of the coupler's stress under different operating conditions, early detection of potential safety hazards, and the implementation of corresponding preventative measures, thereby ensuring train operation safety. This calibration relationship also provides a basis for coupler inspection and maintenance. In actual testing, by measuring the support reaction force at the tail of the target coupler and combining it with the calibration relationship, the magnitude of the vertical load at the preset position of the first coupler can be inferred, determining whether the coupler is in normal working condition and promptly identifying coupler faults and damage.

[0096] The calibration relationship between the vertical load and the tail support reaction force of the target coupler is expressed by the following formula:

[0097] in, Fi This refers to the support reaction force at the tail of the target coupler under vertical load. c This is the distance from the preset position of the first coupler to the tail of the target coupler. l The total length of the first coupler and the total length of the second coupler. F The vertical load applied at a predetermined position on the first coupler.

[0098] Please see Figure 7 , Figure 7 A flowchart illustrating the first calibration relationship between the vertical load and the tail support reaction force of the first coupler provided in an embodiment of this application; Here, the calibration relationship between the vertical load and the support reaction force at the tail of the first coupler is the first calibration relationship, such as... Figure 7 As shown, the first calibration relationship between the vertical load and the support reaction force at the tail of the first coupler is established in the following manner: S701. Determine the equilibrium equations for the three-point bending beam model. The equilibrium equations are used to characterize the sum of the support reaction forces at the tail of the first coupler and the support reaction forces at the tail of the second coupler as the vertical load.

[0099] A systemic force analysis is performed on the three-point bending beam model. The first and second couplers are considered as a single structure, and their force balance under vertical load is taken into account. Let the support reaction force at the tail of the first coupler be F1, the support reaction force at the tail of the second coupler be F2, and the vertical load be F. According to the principle of force equilibrium, in the vertical direction, the sum of all upward forces equals the sum of all downward forces, thus yielding the equilibrium equation F1 + F2 = F.

[0100] Here, the equilibrium equation clarifies the fundamental mechanical relationship between the reaction force at the tail of the coupler and the vertical load, providing a basis for subsequent analysis. This equation allows for a preliminary understanding of the relationship between the sum of the reaction forces at the tail of the two couplers and the vertical load, helping to grasp the overall force situation of the coupler.

[0101] S702. Obtain the deformation coordination relationship. The deformation coordination relationship is used to characterize that the vertical displacement of the coupling end of the first coupler is equal to the vertical displacement of the coupling end of the second coupler, and the rotation angle of the coupling end of the first coupler is equal to the rotation angle of the coupling end of the second coupler.

[0102] Based on the deformation theory in mechanics of materials, the deformation of the coupler under stress is analyzed. Since the first coupler and the second coupler are directly connected at the coupling end, in order to ensure the continuity of the connection and the integrity of the structure, their coupling end must meet the deformation compatibility condition under stress. That is, the vertical displacement w1 of the coupling end of the first coupler is equal to the vertical displacement w2 of the coupling end of the second coupler, w1=w2; the rotation angle θ1 of the coupling end of the first coupler is equal to the rotation angle θ2 of the coupling end of the second coupler, θ1=θ2.

[0103] The deformation compatibility relationship can be verified experimentally. Displacement and angle sensors are installed on the coupler model. After applying a vertical load, the vertical displacement and rotation angle at the coupling end are measured. The measurement results of the first coupler and the second coupler are compared to verify whether the deformation compatibility relationship is valid.

[0104] Here, the deformation compatibility relationship ensures the continuity of the coupler connection during stress, avoiding structural damage or connection failure due to deformation incompatibility. This is crucial for the reliability of the coupler in actual operation; when solving the mechanical problems of the coupler, the deformation compatibility relationship can serve as a constraint condition, limiting the range of solutions and making the solution results more consistent with reality. By satisfying the deformation compatibility relationship, a reasonable coupler deformation and stress distribution can be obtained.

[0105] S703. Based on the equilibrium equation and deformation coordination relationship, determine the torque balance equation at the preset position of the first coupler.

[0106] Here, we take the first coupler as the research object and consider its torque balance at the preset position. Based on the equilibrium equation and deformation compatibility relationship, we analyze the forces and torques acting on the first coupler. The distance from the preset position on the first coupler to the tail of the second coupler is a (section CE), and the distance from the preset position on the first coupler to the tail of the first coupler is b (section CB). The support reaction force F1 at the tail of the first coupler generates a torque on the preset position.

[0107] Based on the principle of torque balance, a torque is taken at the preset position for the first coupler, such that the sum of clockwise torques equals the sum of counterclockwise torques, thus establishing a torque balance equation. For example, if only the reaction force F1 at the tail of the first coupler and the vertical load F are considered, the torque balance equation is F1×QF×a=0 (where Q is the distance between the tails of the first and second couplers, which is 2 in this case). l , l (This refers to the distance between the first coupler and the distance between the second coupler).

[0108] S704. Based on the moment balance equation, determine the first calibration relationship between the vertical load and the support reaction force at the tail of the first coupler.

[0109] The first calibration relationship is used to characterize the support reaction force at the tail of the first coupler as the product of a first preset ratio and the vertical load. The first preset ratio is determined based on the distance from the preset position of the first coupler to the tail of the second coupler and the total distance, where the total distance is the distance from the tail of the first coupler to the tail of the second coupler.

[0110] Solving the moment balance equation yields the direct relationship between the vertical load F and the reaction force F1 at the tail of the first coupler. The ratio of the reaction force F1 at the tail of the first coupler to the vertical load F is the ratio of a to 2l. In other words, the ratio of the reaction force at the tail of the first coupler to the vertical load is the ratio of the distance between the preset position of the first coupler and the tail of the second coupler to the total distance between the tails of the first coupler and the tails of the second coupler. This is the first calibration relationship.

[0111] The calibration relationship between the vertical load and the support reaction force at the tail of the first coupler is expressed by the following formula:

[0112] Where F1 is the support reaction force at the tail of the first coupler under the action of vertical load, and a is the distance from the preset position of the first coupler to the tail of the second coupler. l Let F be the total length of the first coupler and the total length of the second coupler, and F be the vertical load applied at a preset position on the first coupler.

[0113] Similar to the first coupler, the calibration relationship between the vertical load and the support reaction force at the tail of the second coupler is the second calibration relationship, which determines the second calibration relationship of the second coupler.

[0114] Please see Figure 8 , Figure 8 A flowchart illustrating the second calibration relationship between the vertical load and the tail support reaction force of the second coupler provided in an embodiment of this application; Among them, such as Figure 8 As shown, the second calibration relationship between the vertical load and the support reaction force at the tail of the second coupler is established in the following manner: S801. Determine the equilibrium equations for the three-point bending beam model.

[0115] The equilibrium equation is used to characterize the sum of the support reaction forces at the tail of the first coupler and the support reaction forces at the tail of the second coupler as the vertical load. S802. Obtain the deformation coordination relationship. The deformation coordination relationship is used to characterize that the vertical displacement of the coupling end of the first coupler is equal to the vertical displacement of the coupling end of the second coupler, and the rotation angle of the coupling end of the first coupler is equal to the rotation angle of the coupling end of the second coupler.

[0116] The descriptions of S801 to S802 can be referred to the descriptions of S701 to S702, and can achieve the same technical effect, so they will not be elaborated further.

[0117] S803. Based on the equilibrium equation and deformation coordination relationship, determine the torque balance equation at the preset position of the second coupler.

[0118] Here, we take the second coupler as the research object and consider its torque balance at the preset position. Based on the equilibrium equation and deformation compatibility relationship, we analyze the forces and torques acting on the second coupler. The distance from the preset position on the first coupler to the tail of the second coupler is a (section CE), and the distance from the preset position on the first coupler to the tail of the first coupler is b (section CB). The support reaction force F2 at the tail of the second coupler generates a torque on the preset position.

[0119] Based on the principle of torque balance, a torque is taken at the preset position for the second coupler, such that the sum of clockwise torques equals the sum of counterclockwise torques, thus establishing a torque balance equation. For example, if only the reaction force F1 at the tail of the second coupler and the vertical load F are considered, the torque balance equation is F2×QF×b=0 (where Q is the distance between the tails of the first and second couplers, which is 2 in this case). l , l (This refers to the distance between the first coupler and the distance between the second coupler).

[0120] S804. Based on the moment balance equation, determine the second calibration relationship between the vertical load and the support reaction force at the tail of the second coupler.

[0121] The second calibration relationship is used to characterize the support reaction force at the tail of the second coupler as the product of a second preset ratio and the vertical load. The second preset ratio is determined based on the distance from the preset position of the first coupler to the tail of the first coupler and the total distance.

[0122] Solving the moment balance equation yields the direct relationship between the vertical load F and the tail reaction force F2 of the second coupler. The ratio of the tail reaction force F2 of the second coupler to the vertical load F is the ratio of b to 2l. In other words, the ratio of the tail reaction force of the second coupler to the vertical load is the ratio of the distance between the preset position of the first coupler and the tail of the first coupler to the total distance between the tail of the first coupler and the tail of the second coupler. This is the second calibration relationship.

[0123] The calibration relationship between the vertical load and the support reaction force at the tail of the second coupler is expressed by the following formula:

[0124] Where F2 is the support reaction force at the tail of the second coupler under the action of vertical load, and b is the distance from the preset position of the first coupler to the tail of the first coupler. l Let F be the total length of the first coupler and the total length of the second coupler, and F be the vertical load applied at a preset position on the first coupler.

[0125] Based on the three-point bending beam theory of mechanics of materials, this application accurately explains the mechanical transmission and distribution law under coupled loading conditions of the coupler, making the calibration process closely match the mechanical essence of the actual force on the coupler and improving the calibration accuracy. Through high-precision loading, detection units and data processing algorithms, it realizes high-precision acquisition and analysis of parameters such as force and displacement. The detection accuracy of support reaction force and deformation is much higher than that of traditional methods. It can accurately capture the subtle characteristics of the coupler's mechanical performance and provide high-precision data support for coupler design optimization and safety assessment.

[0126] This application is compatible with the coupling calibration of different couplers, and can be achieved by adjusting model parameters (such as a, b, ...). lIt is applied to various load conditions, providing a standardized and high-precision calibration solution for the mechanical performance control of railway vehicle couplers throughout the entire process from R&D to operation and maintenance, and promoting the iteration of coupler technology and the improvement of railway operation safety.

[0127] This application simplifies the coupled No. 1 and No. 2 couplers into a beam structure with simply supported end A and fixed end B, and solves the load transfer law by establishing a mechanical model. The specific steps are as follows: 1) Structural simplification: The A end of the No. 1 coupler (coupled with the No. 2 coupler) is simply supported (only providing vertical support reaction force), and the B end (tail of the coupler) is fixedly supported (providing vertical support reaction force and bending moment), forming a "simply supported-fixed supported" composite beam model.

[0128] 2) Mechanical Modeling: Based on mechanics of materials, equilibrium equations (force equilibrium and moment equilibrium) and deflection curve differential equations are established. The equilibrium equations describe the overall stress state, and the deflection curve differential equations are solved by integration to obtain the beam deformation, and the integration constants are determined by combining the boundary conditions.

[0129] 3) Load calculation: The support reaction force R at end A of the first coupler is obtained by solving the equation. A This force is the load transmitted to the second coupler.

[0130] This application accurately reflects the structural characteristics of both couplers being simply supported at one end and fixed at the other, and ensures calculation accuracy based on the theory of mechanics of materials; it can be directly applied to the static load calibration experiment of coupler coupling of heavy-duty freight cars, and the operation is simple; by adjusting the model parameters (such as coupler length, load application point position, etc.), it can be adapted to the calibration requirements of different coupler models.

[0131] Based on the same inventive concept, this application also provides a coupler force calibration device corresponding to the coupler force calibration method. Since the principle of the device in this application is similar to the coupler force calibration method described above in this application, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0132] Please see Figure 9 , Figure 9 This is a schematic diagram of the coupler force calibration device provided in an embodiment of this application. Figure 9 As shown, the coupler force calibration device 900 includes: The cantilever beam simulation model acquisition module 901 is used to acquire a cantilever beam simulation model, which includes a first coupler and a second coupler in a coupled state. The coupling end of the first coupler is set as a simply supported constraint, and the tail of the first coupler is set as a fixed constraint. The coupling end of the second coupler is set as a simply supported constraint, and the tail of the second coupler is set as a fixed constraint. The simply supported constraint means that the coupling end of the corresponding coupler can rotate freely, but the vertical displacement of the coupling end of the corresponding coupler is restricted. The fixed constraint simultaneously restricts the vertical displacement and rotation angle of the tail of the corresponding coupler. Lateral load application module 902 is used to apply a lateral load at a preset position on the first coupler; The calibration relationship determination module 903 is used to determine the support reaction force at the coupling end of the first coupler under the action of the lateral load, so as to construct a calibration relationship to characterize the lateral load at the preset position and the support reaction force at the coupling end of the first coupler, wherein the support reaction force at the coupling end of the first coupler is the lateral force transmitted from the first coupler to the second coupler.

[0133] Please see Figure 10 , Figure 10 This is a schematic diagram of the structure of the electronic device provided in an embodiment of this application. Figure 10 As shown, the electronic device 500 includes a processor 510, a memory 520, and a bus 530.

[0134] The memory 520 stores machine-readable instructions executable by the processor 510. When the electronic device 500 is running, the processor 510 and the memory 520 communicate via the bus 550. When the machine-readable instructions are executed by the processor 510, they can perform the operations described above. Figure 1 The steps of the coupler force calibration method in the illustrated method embodiment can be found in the method embodiment for specific implementation, and will not be repeated here.

[0135] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the above-described actions. Figure 1 The steps of the coupler force calibration method in the illustrated method embodiment can be found in the method embodiment for specific implementation, and will not be repeated here.

[0136] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0137] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0138] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0139] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0140] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0141] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for calibrating coupler force, characterized in that, include: A simulation model of a cantilever beam is obtained. The simulation model includes a first coupler and a second coupler in a coupled state. The coupling end of the first coupler is set as a simply supported constraint, and the tail of the first coupler is set as a fixed constraint. The coupling end of the second coupler is set as a simply supported constraint, and the tail of the second coupler is set as a fixed constraint. The simply supported constraint means that the coupling end of the corresponding coupler can rotate freely, but the vertical displacement of the coupling end of the corresponding coupler is restricted. The fixed constraint simultaneously restricts the vertical displacement and rotation angle of the tail of the corresponding coupler. A lateral load is applied at a predetermined position on the first coupler; The support reaction force at the coupling end of the first coupler under the action of the lateral load is determined in order to construct a calibration relationship to characterize the lateral load at the preset position and the support reaction force at the coupling end of the first coupler, wherein the support reaction force at the coupling end of the first coupler is the lateral force transmitted from the first coupler to the second coupler. The calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is established in the following manner: Obtain the deflection function and rotation angle function of the tail of the first coupler. The deflection function is used to characterize the vertical displacement of the tail of the first coupler relative to the original axis, and the rotation angle function is used to characterize the angle between the tangent at the tail of the first coupler and the original axis. Based on the first boundary condition, the angle function is substituted to obtain the expression for the first preset parameter. The first boundary condition is determined by the fixed support constraint at the tail of the first coupler. Substituting the expression of the first preset parameter into the deflection function, the calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is obtained.

2. The method according to claim 1, characterized in that, The deflection function and rotation angle function of the tail of the first coupler are represented as follows: in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI The bending stiffness of the beam reflects the coupler's ability to resist bending deformation, w2( l ) is the deflection function, θ2( l Let R be the rotation angle function. A The support reaction force at the coupling end of the first coupler, Let F be the total length of the first coupler, and F be the lateral load applied at a predetermined position on the first coupler. b is the distance from the preset position on the first coupler to the tail of the first coupler, and D1 is the first preset parameter.

3. The method according to claim 1, characterized in that, The deflection function and rotation angle function of the tail of the first coupler are obtained in the following way: Obtain the first bending moment equation between the tail of the first coupler and the preset position of the first coupler; Integrating the first bending moment equation yields the first angle equation between the tail of the first coupler and the preset position of the first coupler. Integrating the first angle equation yields the first deflection equation; Based on the second boundary condition, the first deflection equation and the second deflection equation are substituted to determine the integration constant, so as to determine the deflection function and the rotation angle function of the tail of the first coupler. The second boundary condition is used to characterize that at the preset position of the first coupler, the second deflection equation between the coupling end of the first coupler and the preset position of the first coupler and the first deflection equation between the preset position of the first coupler and the tail of the first coupler are equal, and the rotation angle is continuous.

4. The method according to claim 3, characterized in that, The second deflection equation is determined in the following manner: Obtain the second bending moment equation between the coupling end of the first coupler and the preset position of the first coupler; Integrating the second bending moment equation yields the second rotation angle equation between the coupling end of the first coupler and the preset position of the first coupler. Integrating the second angle equation yields the second deflection equation, which describes the deflection distribution between the coupling end of the first coupler and a preset position of the first coupler.

5. The method according to claim 1, characterized in that, The calibration relationship between the lateral load at the preset position and the support reaction force at the coupling end of the first coupler is expressed by the following formula: Among them, R A Let F be the support reaction force at the coupling end of the first coupler, and let F be the lateral load applied at a predetermined position on the first coupler. l denoted as the total length of the first coupler, and b is the distance from a preset position on the first coupler to the tail of the first coupler.

6. The method according to claim 3, characterized in that, The first deflection equation is expressed by the following formula: in, E The elastic modulus of the coupler material. I Let be the moment of inertia of the coupler section about the neutral axis. EI Let w2(x) be the bending stiffness of the beam, reflecting the coupler's ability to resist bending deformation, and w2(x) be the vertical displacement of the coupler at position x relative to the original axis. R A The support reaction force at the coupling end of the first coupler, F Let be the lateral load applied at a preset position on the first coupler, 'a' be the distance from the preset position on the first coupler to the coupling end of the first coupler, 'D1' be a first preset parameter, and 'D2' be a second preset parameter.

7. A coupler force calibration device, characterized in that, include: The cantilever beam simulation model acquisition module is used to acquire a cantilever beam simulation model. The cantilever beam simulation model includes a first coupler and a second coupler in a coupled state. The coupling end of the first coupler is set as a simply supported constraint, and the tail of the first coupler is set as a fixed constraint. The coupling end of the second coupler is set as a simply supported constraint, and the tail of the second coupler is set as a fixed constraint. The simply supported constraint means that the coupling end of the corresponding coupler can rotate freely, but the vertical displacement of the coupling end of the corresponding coupler is restricted. The fixed constraint simultaneously restricts the vertical displacement and rotation angle of the tail of the corresponding coupler. A lateral load application module is used to apply a lateral load at a preset position on the first coupler; The calibration relationship determination module is used to determine the support reaction force at the coupling end of the first coupler under the action of the lateral load, so as to construct a calibration relationship characterizing the lateral load at the preset position and the support reaction force at the coupling end of the first coupler, wherein the support reaction force at the coupling end of the first coupler is the lateral force transmitted from the first coupler to the second coupler; the calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is constructed in the following way: obtaining the deflection function and the rotation angle function of the tail of the first coupler, wherein the deflection function characterizes the vertical displacement of the tail of the first coupler relative to the original axis, and the rotation angle function characterizes the angle between the tangent at the tail of the first coupler and the original axis; according to the first boundary condition, substituting the rotation angle function, the expression of the first preset parameter is obtained, wherein the first boundary condition is determined by the fixed support constraint of the tail of the first coupler; substituting the expression of the first preset parameter into the deflection function, the calibration relationship between the lateral load and the support reaction force at the coupling end of the first coupler is obtained.

8. An electronic device, characterized in that, include: The device includes a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is in operation, the processor communicates with the memory via the bus, and the processor executes the machine-readable instructions to perform the steps of the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method as described in any one of claims 1 to 6.

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