Method and device for determining strength of structural component, vehicle and electronic equipment

Abstract

The invention relates to a strength determination method and device of a structural component, a vehicle and electronic equipment, and relates to the technical field of vehicles. The method comprises the following steps: simulating a change curve of a load of a target point along with time; wherein the target point is a key connection point of the structural member. And determining a target time period based on the change curve. Wherein the target time period is the time period when the structural part is in a target stress mode, the target stress mode is a one stress mode or a composite stress mode of multiple stress modes, and the moment where the strain peak value of the structural part is located in the target time period is determined as the key stress moment of the structural part. And determining the strength of the structural member based on the load of the target point at the key stress moment. When the method is used for performing simulation analysis on the strength of the structural member, data in the whole load process does not need to be analyzed and processed, and only the load at the key stress moment needs to be processed, so that the data processing amount is reduced, and the simulation efficiency of the structural member is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method and device for determining the strength of a structural component, a vehicle, and an electronic device. Background Art

[0002] Currently, when simulating the structural reliability of a vehicle, the loads of the structural components are usually extracted first, and then the stress and strain are analyzed based on the loads of the structural components to obtain performance indicators of the structural reliability performance.

[0003] When extracting structural component loads, a pre-configured extraction model is used to generate a time-varying load curve for key structural connection points. Furthermore, this time-varying load curve is substituted into the finite element model to solve for stress and strain, yielding performance indicators for structural reliability.

[0004] However, processing the time-varying curve of the load at the key connection points of structural parts through the finite element model requires a lot of time and computing resources, resulting in low simulation efficiency. Summary of the Invention

[0005] One of the purposes of the present application is to provide a method, device, vehicle and electronic equipment for determining the strength of a structural member, thereby improving the simulation efficiency of the structural member.

[0006] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:

[0007] According to the first aspect provided by the present application, a method for determining the strength of a structural member is provided, the method comprising: simulating a load change curve of a target point over time. The target point is a key connection point of the structural member. Based on the change curve, a target time period is determined. The target time period is a time period when the structural member is in a target force mode, the target force mode is a force mode or a composite force mode of multiple force modes, and the moment at which the strain peak of the structural member is located within the target time period is determined as the key force moment of the structural member. Based on the load of the target point at the key force moment, the strength of the structural member is determined.

[0008] Using the aforementioned technical approach, the load on a structural component is divided into distinct time periods. Furthermore, the peak strain of the structural component within each time period is used as the critical stress moment for the structural component. Based on the load at the target point at that critical stress moment, the strength of the structural component is determined. This eliminates the need to analyze and process data from the entire loading process when simulating the strength of the structural component; only the load at the critical stress moment needs to be processed. This reduces the amount of data processing and improves the efficiency of structural component simulation.

[0009] In one possible approach, determining the target period based on the change curve includes determining the possible stress mode of the structural component based on the shape information of the structural component and the position information of the target point. Determining the target period based on the possible stress mode of the structural component and the change curve.

[0010] The above technical approach accurately determines the possible stress pattern of a structural component based on its actual shape and the position of the target point on the component. Furthermore, based on the possible stress pattern and its variation curve, a target time period is determined. This allows the precise determination of the time period during which the structural component is in the target stress pattern.

[0011] In one possible approach, determining a possible force mode of the structural member based on shape information of the structural member and position information of target points includes: determining at least one target point combination corresponding to the structural member; determining a first force mode that the structural member would experience when a load is applied to the target points included in the target point combination based on the shape information of the structural member and the position information of the target points included in the at least one target point combination; and determining the first force mode as the possible force mode of the structural member.

[0012] According to the above technical means, based on the shape of the structural member and the position information of the target points contained in the target assembly point, the combined shape of the target assembly point and the intermediate structural segment can be determined. Furthermore, when a load is applied to the combined shape, the first force mode that will be present is determined as the possible force mode of the structural member. In this way, the possible force mode of the structural member can be determined based on the actual shape of the target assembly point, thereby accurately determining the possible force mode of the structural member.

[0013] In one possible approach, determining a target time period based on the possible stress patterns and load variation curves of a structural component includes: determining, from the possible stress patterns of the structural component, each actual stress pattern of the structural component and the start and end times of each stress pattern based on the load variation curve of each target point included in the structural component. Based on the actual stress patterns of the structural component and the start and end times of each stress pattern, determining at least one stress period in which the stress pattern of the structural component is exactly the same at all times. This at least one stress period is determined as the target time period.

[0014] According to the above technical means, based on the load variation curve of each target point contained in the structural member over time, the various force modes that the structural member is actually in and the force start and end times of each force mode are determined from the force modes that the structural member may be in. In this way, the various force modes that the structural member is actually in and the force start and end times of each force mode can be accurately determined. Furthermore, based on the various force modes that the structural member is actually in and the force start and end times of each force mode, at least one force period in which the force mode of the structural member is exactly the same at each moment is determined. In this way, at least one force period in which the force mode is exactly the same can be accurately obtained.

[0015] In one possible approach, determining the peak strain value of a structural component within a target period includes: determining stress field distribution information for each target point involved in the target force pattern at each moment in the target period based on a load-versus-time curve for each target point involved in the target force pattern during the target period. Based on the stress field distribution information, determining the strain value of the structural component at each moment in the target period. The maximum value among the strain values ​​is determined as the peak strain value of the structural component within the target period.

[0016] Using these techniques, the strain values ​​of the structural component at each moment in the target period are calculated by integrating the stress field distribution information of each target point involved in the target force pattern. This allows for more accurate strain values, and thus more accurate peak strain values.

[0017] In one possible approach, based on the change curve of each target point involved in the target force pattern in the target time period, the stress field distribution information of each target point involved in the target force pattern at each moment in the target time period is determined, including: inputting the change curve, shape information and target force pattern of each target point involved in the target force pattern in the target time period into the stress analysis model to obtain the stress field distribution information of each target point involved in the target force pattern at each moment in the target time period.

[0018] According to the above technical means, stress field distribution information can be quickly obtained through the stress analysis model.

[0019] In one possible embodiment, the method further includes: determining the durability of the structural component based on the load of the target point at the critical stress moment.

[0020] According to the above technical means, the durability of the structural parts can be quickly obtained according to the load of the target point at the critical stress moment, thereby improving the simulation efficiency of durability.

[0021] According to the second aspect provided by the present application, a strength determination device for a structural member is provided, and the strength determination device includes: a simulation unit, a first determination unit, a second determination unit, and a third determination unit. The simulation unit is used to simulate a load change curve of a target point over time. The target point is a key connection point of the structural member. The first determination unit is used to determine a target time period based on the change curve. The target time period is a time period when the structural member is in a target force mode, and the target force mode is a force mode or a composite force mode of multiple force modes. The second determination unit is further used to determine the moment at which the strain peak of the structural member is located within the target time period as the key force moment of the structural member. The third determination unit is further used to determine the strength of the structural member based on the load of the target point at the key force moment.

[0022] In one possible embodiment, the first determining unit is specifically configured to: determine a possible force mode of the structural component based on shape information of the structural component and position information of the target point; and determine a target time period based on the possible force mode and a change curve of the structural component.

[0023] In one possible embodiment, the first determining unit is specifically configured to: determine at least one target point combination corresponding to the structural component; determine, based on shape information of the structural component and position information of target points included in the at least one target point combination, a first force mode that the structural component will experience when a load is applied to the target points included in the target point combination; and determine the first force mode as a possible force mode that the structural component may experience.

[0024] In one possible approach, the first determination unit is specifically configured to: determine, from the possible force modes in which the structural member may be subjected, each actual force mode in which the structural member is subjected, and the force start and end times of each force mode based on a load variation curve of each target point included in the structural member. Based on the actual force modes in which the structural member is subjected and the force start and end times of each force mode, determine at least one force period in which the force mode of the structural member is identical at all times. The at least one force period is determined as the target period.

[0025] In one possible embodiment, the second determination unit is specifically configured to determine stress field distribution information for each target point involved in the target force pattern at each moment in the target period based on a load-versus-time curve for each target point involved in the target force pattern during the target period. Based on the stress field distribution information, determine strain values ​​of the structural component at each moment in the target period. The maximum value among the strain values ​​is determined as the peak strain value of the structural component during the target period.

[0026] In one possible embodiment, the second determination unit is specifically used to: input the change curve, shape information and target force pattern of each target point involved in the target force pattern in the target time period into the stress analysis model, and obtain the stress field distribution information of each target point involved in the target force pattern at each moment in the target time period.

[0027] In one possible manner, the third determination unit is further configured to determine the durability of the structural component based on the load of the target point at the critical stress moment.

[0028] According to a third aspect of the present application, a vehicle is provided, wherein the strength determination apparatus according to the second aspect is used to determine the strength of a vehicle structural member.

[0029] According to the fourth aspect provided by the present application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the method of the above-mentioned first aspect and any possible implementation method thereof.

[0030] According to the fifth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of the processing device, the processing device is enabled to execute the method in the above-mentioned first aspect and any possible implementation method thereof.

[0031] According to the sixth aspect provided by the present application, a computer program product is provided, which includes computer instructions. When the computer instructions are executed on a processing device, the processing device executes the method of the above-mentioned first aspect and any possible implementation method thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a system for determining the strength of a structural member is shown as an exemplary embodiment provided in this application;

[0033] Figure 2 is a schematic structural diagram of a structural member according to an exemplary embodiment;

[0034] Figure 3 is a schematic diagram showing a load variation curve over time according to an exemplary embodiment;

[0035] Figure 4 1 is a flow chart of a method for determining the strength of a structural member according to an exemplary embodiment;

[0036] Figure 5 is a schematic diagram showing a force mode of a structural member according to an exemplary embodiment;

[0037] Figure 6is a schematic diagram showing a force-bearing period of a force-bearing mode according to an exemplary embodiment;

[0038] Figure 7 FIG1 is a schematic diagram showing a simulation of a key connection point on a three-dimensional infinite object according to an exemplary embodiment;

[0039] Figure 8 is a schematic diagram showing a vacancy effect of a key connection point according to an exemplary embodiment;

[0040] Figure 9 1 is a schematic diagram of a device for determining the strength of a structural member according to an exemplary embodiment;

[0041] Figure 10 The figure is a schematic diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0042] The following will describe the embodiments of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for the purpose of illustrating the present application and are not intended to limit the scope of protection of the present application.

[0043] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0044] like Figure 1 As shown, Figure 1 The present invention provides a structural member strength determination system 10. The structural member strength determination system 10 may include a dynamics simulation module 101, a key load extraction module 102, and a finite element simulation module 103. The key load extraction module 102 is connected to the dynamics simulation module 101 and the finite element simulation module 103, respectively.

[0045] The dynamic simulation module 101 is used to simulate the load variation curve of the key connection points of the structural parts over time.

[0046] For example, the dynamics simulation module 101 is used to simulate the load variation curve of each key connection point of the structural component under different driving conditions over time.

[0047] In the embodiment of the present application, the key connection point of the structural member can be a key stress point of the structural member or a force application point of the structural member. Driving conditions can include overload conditions, rapid acceleration and deceleration conditions, sharp turns, and driving conditions on potholes.

[0048] For example, in Figure 2 In FIG, the key connection points of the structural member A are shown: point A, point B, point C and point D.

[0049] For example, in Figure 3 In the figure, the load variation curves of multiple key connection points of structural member B over time are shown, where the horizontal axis represents time and the vertical axis represents load. Figure 3 It can be seen that each key connection point of structural member B generates a large amount of load data during the simulation process.

[0050] The critical load extraction module 102 is configured to obtain a time-varying load curve for the critical connection points of the simulated structural component and, based on the time-varying load curve for the critical connection points of the simulated structural component and the structural information of the structural component, determine a target time period. The target time period is the time period during which the structural component is subjected to a target stress mode, which may be a single stress mode or a combination of multiple stress modes. Furthermore, the moment of peak strain of the structural component within the target time period is determined as the critical stress moment of the structural component.

[0051] The finite element simulation module 103 is used to determine the strength and / or durability of the target structure of the structural component based on the load of the target point at the critical stress moment.

[0052] It should be noted that in the embodiment of the present application, the structural member strength determination system 10 runs in an electronic device, which may be a server or a terminal device, and this application does not limit this.

[0053] The server in the embodiment of the present application can be a single server, a server cluster, or a cloud server, and the embodiment of the present application does not limit this.

[0054] For ease of understanding, the information prompt method provided by this application is described in detail below with reference to the accompanying drawings.

[0055] Figure 4 According to a flowchart of a method for determining the strength of a structural component according to an exemplary embodiment, the method includes: S401-S404.

[0056] S401, simulate the load variation curve of the target point over time.

[0057] Among them, the target point is the key connection point of the structural member.

[0058] In some embodiments, the electronic device is used to determine a load variation curve of a target point of the structural component over time based on the target driving condition, the dynamics simulation module, the mass of the target device, and the structural information of the structural component.

[0059] For example, in order to simulate the time-varying curve of the load of structural component A under an overload condition, the dynamic simulation module is used to simulate the time-varying curve of the load of each structural component of the vehicle under the overload condition, thereby obtaining the time-varying curve of the load of structural component A.

[0060] In other embodiments, the electronic device simulates a load variation curve of a target point of the structural component over time based on the structural information of the structural component, the load information of the structural component, a dynamics simulation module, and the target driving condition.

[0061] S402: Determine a target time period based on the change curve.

[0062] The target period is the period when the structural member is in the target stress mode, and the target stress mode is one stress mode or a composite stress mode of multiple stress modes.

[0063] In some embodiments, the electronic device determines the possible force pattern of the structural member based on the structural member's shape information and the target point's position information, and determines the target time period based on the possible force pattern and change curve of the structural member. This step is described in detail in the following embodiments and will not be repeated here.

[0064] In other embodiments, when obtaining a load variation curve of a target point over time, the electronic device determines a target time period based on the shape information of the structural member, the position information of the key connection point on the structural member, and the load variation curve of the target point over time.

[0065] In the embodiments of this application, a force mode refers to the stress conditions experienced by a structural member under the action of an external force, including different types of forces and their interactions. Force modes can be categorized based on the manner in which the forces act, such as axial, shear, bending, and torsional modes. Other categorizations based on the manner in which the forces act can also be used, without limitation.

[0066] S403: Determine the moment at which the strain peak of the structural component occurs within the target period as the critical stress moment of the structural component.

[0067] In some embodiments, the electronic device determines the stress field distribution information of each target point involved in the target force pattern at each moment in the target period based on the load variation curve of each target point involved in the target force pattern in the target period. Furthermore, the electronic device determines the strain value of the structural member at each moment in the target period based on the stress field distribution information, and determines the maximum value of the strain value as the strain peak value of the structural member in the target period. Subsequently, the electronic device determines the moment at which the strain peak value of the structural member in the target period occurs as the critical force moment of the structural member. This step is detailed in the following embodiment and will not be repeated here.

[0068] S404: Determine the strength of the structural member based on the load of the target point at the critical stress moment.

[0069] In an embodiment of the present application, the electronic device determines one or more force modes based on the load variation curve of the target point over time, thereby obtaining the stress concentration pattern of the structural part under the corresponding force mode. Furthermore, the electronic device finds the key time segment with the most significant stress concentration based on the stress concentration pattern of the structural part. Among them, the force mode is determined by the basic principles of material mechanics, and the key time segment is the moment when the structural part presents a clear stress concentration pattern and a high stress level under the superposition of all force modes. Alternatively, the electronic device uses a formula to quickly calculate the moment of maximum stress in the segment for the load in the key time segment, and determines it as the key moment. Since the key time segment is a section with significant global stress, the moment of maximum stress calculated in the key time segment is the moment of maximum global stress.

[0070] In some embodiments, when obtaining a critical stress moment of a structural component, the electronic device determines the load at the target point at the critical stress moment based on the critical stress moment and a load-over-time curve at the target point, and obtains strength index data of the structural component based on the load at the target point at the critical stress moment and a finite element model. Furthermore, the electronic device determines the strength of the structural component based on the strength index data.

[0071] For example, electronic equipment determines the strength of structural parts based on strength index data, thereby judging whether the strength of the structural parts can meet the requirements of the entire loading process. Subsequently, if the strength of the structural parts does not meet the strength requirements, the structural parts are optimized and the optimized structural parts are simulated until the strength of the structural parts meets the strength requirements.

[0072] In some embodiments, the electronic device determines the durability of the structural member based on the load at the target point at the critical stress moment.

[0073] The method for determining the strength of a structural component provided in an embodiment of the present application provides at least the following beneficial effects: the load on the structural component is divided into different time periods. Furthermore, the peak strain of the structural component within each time period is used as the critical stress moment of the structural component, and the strength of the structural component is determined based on the load at the target point at the critical stress moment. In this way, when simulating and analyzing the strength of the structural component, there is no need to analyze and process data from the entire loading process; only the load at the critical stress moment needs to be processed, which reduces the amount of data processing and thus improves the simulation efficiency of the structural component.

[0074] In one design, the above S402 includes: S4021-S4022.

[0075] S4021. Determine a possible stress mode of the structural member based on the shape information of the structural member and the position information of the target point.

[0076] As a possible implementation method, the electronic device obtains shape information of the structural member and position information of the target point on the structural member, and determines the possible force mode of the structural member based on the shape information of the structural member and the position information of the target point.

[0077] For example, Figure 2 Take the structural part A as an example. The electronic device obtains the shape information of the structural part A, the position information of the key connection point A, the key connection point B, the key connection point C and the key connection point D, and obtains the following Figure 5 The schematic diagram of the force mode of the structural member A is shown in FIG. Figure 5 In the figure, the possible stress modes of the structural member A include: AB axial mode, AB torsional mode, ABC bending mode, BAD bending mode and BD bending mode.

[0078] In the embodiment of the present application, the axial mode can also be called a two-force mode.

[0079] In some embodiments, the electronic device determines at least one target point combination corresponding to the structural member. Furthermore, based on the shape information of the structural member and the position information of the target points included in the at least one target point combination, the electronic device determines a first force mode that the structural member will be in when a load is applied to the target points included in the target point combination, and determines the first force mode as the possible force mode that the structural member may be in.

[0080] For example, Figure 2Take the structural part A in the structure as an example. The electronic device determines the target point combination corresponding to the structural part A: AB combination, AC combination, AD combination, ABC combination, ABD combination, BC combination, CD combination, BD combination and BCD combination. Furthermore, for the AB combination, the electronic device determines the first force mode that the structural part will be in when a load is applied at the target point included in the AB combination based on the position information of point A and point B included in the AB combination: AB axial mode, AB torsional mode, and determines the AB axial mode and AB torsional mode as the force modes that the structural part may be in. Similarly, the electronic device determines the force modes that the AC combination, AD combination, ABC combination, ABD combination, BC combination, CD combination, BD combination and BCD combination may be in. In an embodiment of the present application, the shape information of the structural part may include information such as the shape of the structural part and the structural material of the structural part. The position information of the target point may include the specific position of the target point on the structural part.

[0081] In an embodiment of the present application, the electronic device combines all the load channels. The load channel is a force on a target point along a certain direction of the reference system. For example, the force along the x-direction of the target point A. Furthermore, the electronic device determines a possible force mode of the structural member and the characteristics of its stress concentration area based on the shape information of the structural member and a certain load channel combination. For example, a rod-shaped structural member and the axial forces at both ends can determine the "tension and compression" force mode of the structural member, and its stress concentration area covers the entire rod, and the maximum principal stress is evenly distributed. In this way, the electronic device determines all possible force modes of the structural member based on the force mode determination method.

[0082] S4022. Determine the target time period based on the possible stress modes and change curves of the structural components.

[0083] In some embodiments, the electronic device determines the magnitude, positive and negative information, and force time of the target point based on the change curve, and determines the effective period of each force mode based on the magnitude, positive and negative information, force time, and force mode of the target point.

[0084] This step is described in detail in the following embodiment and will not be repeated here.

[0085] In one design, the above S4022 includes: S501-S503.

[0086] S501 : Based on a load variation curve of each target point included in the structural member over time, determine each actual stress mode of the structural member and the stress start and end time of each stress mode from possible stress modes of the structural member.

[0087] For example, the possible force modes of structural member A include: AB axial mode, AB torsional mode, ABC bending mode, BAD bending mode, and BD bending mode. Based on the load-over-time curve of each target point contained in the structural member, the electronic device determines the actual force modes of the structural member and the force start and end times of each force mode from the possible force modes of the structural member: AB torsional mode and the force start and end times of the AB torsional mode, ABC bending mode and the force start and end times of the ABC bending mode, BAD bending mode and the force start and end times of the BAD bending mode, BD bending mode and the force start and end times of the BD bending mode.

[0088] It should be noted that the start and end time of each force mode may include one or more.

[0089] S502 : Based on the actual stress modes of the structural member and the stress start and end times of the stress modes, determine at least one stress period in which the stress modes of the structural member are completely the same at each moment.

[0090] In some embodiments, when obtaining the start and end time of each force mode, the electronic device maps the start and end time of each force mode to the time axis and regards the period with exactly the same force mode of the structural component as a force period.

[0091] S503: Determine at least one stress-bearing period as a target period.

[0092] For example, Figure 6 As shown in FIG, the start and end times of different stress modes on the time axis are shown, and target period 1, target period 2, and target period 3 are obtained. In target period 1, the actual stress mode of the structural component includes the AB torsion mode and the BD bending mode. In target period 2, the actual stress mode of the structural component includes the BD bending mode and the ABC bending mode. In target period 3, the actual stress mode of the structural component includes the ABC bending mode.

[0093] In the embodiment of the present application, when determining the load channel of a certain force mode, the electronic device determines whether the force information of the target point corresponding to the force mode meets the load channel conditions of the force mode based on the load change curve over time, and thus provides the action period of the force mode if the load channel conditions are met. Specifically, the action period of the mode is recorded from the time when the force direction of the load channel recorded by the load change curve over time is the same as the direction of the load channel of the force mode, until the direction is opposite. In this way, the action period of all force modes of the structural component is determined.

[0094] In one design, the process of determining the strain peak value of the structural component within the target time period in the embodiment of the present application includes: S504-S506.

[0095] S504 : Determine stress field distribution information of each target point involved in the target force pattern at each moment in the target period based on a load variation curve of each target point involved in the target force pattern in the target period.

[0096] In some embodiments, the electronic device inputs the change curve, shape information and target force pattern of each target point involved in the target force pattern in the target time period into the stress analysis model to obtain the stress field distribution information of each target point involved in the target force pattern at each moment in the target time period.

[0097] It should be noted that the stress analysis model is a pre-trained model.

[0098] In other embodiments, the electronic device determines the stress field distribution information for each target point within the target time period based on an infinite three-dimensional algorithm, the change curves of each target point involved in the target force pattern during the target time period, and the shape information. Furthermore, the electronic device solves the stress field distribution information at any moment within the target time period based on the stress field distribution information for each target point and the target force pattern, obtaining the stress field distribution information at that moment and thereby obtaining the stress field distribution information for each target point involved in the target force pattern at each moment within the target time period.

[0099] For example, Figure 7 As shown in FIG, taking the load acting on the key connection point C as a unit load acting on a three-dimensional infinite object as an example, the strain field distribution information caused by the key connection point C is determined.

[0100] Furthermore, since the key connection point C is not an ideal three-dimensional infinite, the vacancy effect of the key connection point C in space is processed according to the actual shape information of the key connection point C to obtain the actual strain field distribution information of the key connection point C under unit load. Figure 8 The figure shows the vacancy effect at the critical connection point C. Since the width of the structural member at this critical connection point C is limited along the x-direction, there is a significant vacancy effect (marked with the word "vacancy" in the figure). Therefore, the field of these parts, which ideally contain material but are actually vacant, is accumulated to the nearby parts of the structure without vacancy (the direction of accumulation is shown by the thick arrow in the figure).

[0101] In an embodiment of the present application, the electronic device calculates the stress distribution value caused by all loads in the critical time segment based on the stress field formula caused by a unit force at a point in a three-dimensional infinite object, thereby finding the moment when the stress value in the critical time segment is the largest.

[0102] Subsequently, the stress field distribution information of the key connection point C in the target time period is determined based on the actual strain field distribution information of the key connection point C under unit load and the change curve of the key connection point C in the target time period.

[0103] In some embodiments, the electronic device determines information such as the stress concentration area of ​​the structural part under different stress modes, the magnitude of the stress, and the sign of the stress based on the basic formula of material mechanics.

[0104] S505 : Determine the strain value of the structural component at each moment in the target period based on the stress field distribution information.

[0105] In some embodiments, the electronic device maps the stress field distribution information at each moment to the structural member, determines the strain values ​​at different positions of the structural member, and uses the maximum strain value as the strain value at each moment.

[0106] For example, taking the case where the target time period includes the BD bending mode and the ABC bending mode, the electronic device obtains the stress field distribution information of the structural component in the BD bending mode and the stress field distribution information of the ABC bending mode at time A, maps the stress field distribution information of the BD bending mode and the stress field distribution information of the ABC bending mode to the structural component, and obtains the strain values ​​at different positions of the structural component. Subsequently, the electronic device determines that the strain value at position A is the largest, and thus determines the strain value at position A to be the strain value at time A.

[0107] S506: Determine the maximum value among the strain values ​​as the strain peak value of the structural component within the target period.

[0108] In some embodiments, when there are multiple maximum values, a strain value can be randomly determined from the multiple maximum values ​​as the strain peak value of the structural component within the target period. In this way, a strain peak value is determined, and subsequently, the time corresponding to the strain peak value is determined as the critical stress moment of the structural component within the target period.

[0109] In some embodiments, when there are multiple maximum values, the multiple maximum values ​​are used as the strain peak values ​​of the structural member within the target time period. In this way, multiple strain peak values ​​are determined, and subsequently, the moments corresponding to the multiple strain peak values ​​are determined as the key stress moments of the structural member within the target time period. In another case, the electronic device determines the various stress modes that the structural member is actually in and the stress start and end time of each stress mode based on the load change curve of the target point over time, the shape information of the structural member, and the position of the target point. Furthermore, the electronic device determines the strain values ​​of the structural member at different moments based on the load change curve of the target point over time and the stress start and end time of each stress mode. Subsequently, the electronic device uses the moment with the largest strain value as the key stress moment, and determines the strength of the structural member based on the load of the target point at the key stress moment.

[0110] In an embodiment of the present application, the electronic device superimposes the characteristics of the stress concentration patterns and stress amounts caused by all force modes from the start of the simulation, and calculates the total stress concentration pattern corresponding to different simulation moments. Furthermore, the electronic device adds the stress concentration positions with the same stress amount signs, and subtracts the stress concentration positions with the same stress amount signs but opposite stress amounts. Subsequently, the electronic device determines one or more key time segments. Among them, the stress concentration pattern of the structural component in a key time segment is clear, and the stress value is very significant. Finally, the electronic device uses an analytical solution to find the moment of maximum stress of the structure based on the load curve within the key time segment.

[0111] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to realize the above functions, the communication device includes a hardware structure and / or software module corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0112] Figure 9 The present invention is a device for determining the strength of a structural member according to an exemplary embodiment. Figure 9 The structural member strength determination device 90 includes: a simulation unit 901 , a first determination unit 902 , a second determination unit 903 and a third determination unit 904 .

[0113] The simulation unit 901 is used to simulate the load change curve of the target point over time. The target point is the key connection point of the structural member. The first determination unit 902 is used to determine the target time period based on the change curve. The target time period is the time period when the structural member is in the target force mode, and the target force mode is a force mode or a composite force mode of multiple force modes. The second determination unit 903 is also used to determine the moment when the strain peak of the structural member is within the target time period as the key force moment of the structural member. The third determination unit 904 is also used to determine the strength of the structural member based on the load of the target point at the key force moment.

[0114] In one possible manner, the first determining unit 902 is specifically configured to: determine a possible stress mode of the structural component based on shape information of the structural component and position information of the target point; and determine a target time period based on the possible stress mode and a change curve of the structural component.

[0115] In one possible embodiment, the first determining unit 902 is specifically configured to determine at least one target point combination corresponding to the structural component. Based on the shape information of the structural component and the position information of the target points included in the at least one target point combination, determine a first force mode that the structural component will be in when a load is applied to the target points included in the target point combination. The first force mode is determined as the force mode that the structural component may be in.

[0116] In one possible embodiment, the first determining unit 902 is specifically configured to: determine, from the possible force modes in which the structural member may be subjected, each force mode in which the structural member is actually subjected, and the force start and end times of each force mode based on a load variation curve of each target point included in the structural member. Based on the actual force modes in which the structural member is actually subjected and the force start and end times of each force mode, determine at least one force period in which the force modes of the structural member are identical at all times. The at least one force period is determined as the target period.

[0117] In one possible embodiment, the second determining unit 903 is specifically configured to determine stress field distribution information for each target point involved in the target force pattern at each moment in the target period based on a load-versus-time curve for each target point involved in the target force pattern during the target period. Based on the stress field distribution information, the strain value of the structural component at each moment in the target period is determined. The maximum value among the strain values ​​is determined as the peak strain value of the structural component during the target period.

[0118] In one possible manner, the second determination unit 903 is specifically used to: input the change curve, shape information and target force pattern of each target point involved in the target force pattern in the target time period into the stress analysis model, and obtain the stress field distribution information of each target point involved in the target force pattern at each moment in the target time period.

[0119] In a possible manner, the third determining unit 904 is further configured to determine the durability of the structural component based on the load of the target point at the critical stress moment.

[0120] Figure 10 FIG. 1 is a schematic diagram of an electronic device according to an exemplary embodiment. Figure 10 As shown, the processing device includes but is not limited to: a processor 1001 and a memory 1002 .

[0121] The memory 1002 is used to store executable instructions of the processor 1001. It is understandable that the processor 1001 is configured to execute instructions to implement the method for determining the strength of a structural member in the above embodiment.

[0122] It should be noted that those skilled in the art can understand that Figure 10 The processing device structure shown in the figure does not constitute a limitation on the processing device, and the processing device may include Figure 10 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0123] Processor 1001 is the control center of the processing device. It connects the various parts of the entire processing device using various interfaces and lines. By running or executing software programs and / or modules stored in memory 1002 and calling data stored in memory 1002, it performs various functions of the processing device and processes data, thereby monitoring the processing device as a whole. Processor 1001 may include one or more processing units. Optionally, processor 1001 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly handles wireless communications. It is understood that the modem processor may not be integrated into processor 1001.

[0124] The memory 1002 can be used to store software programs and various data. The memory 1002 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). Furthermore, the memory 1002 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0125] In an exemplary embodiment, a computer-readable storage medium including instructions is further provided, such as a memory 1002 including instructions. The instructions can be executed by a processor 1001 of a processing device to implement the method in the above embodiment.

[0126] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0127] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, which can be executed by the processor 1001 of the processing device to implement the method in the above embodiment.

[0128] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the processing device, the various processes of the above-mentioned method embodiment are implemented and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0129] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete the full classification or partial functions described above.

[0130] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0131] Units described as separate components may or may not be physically separate, and components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0132] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0133] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0134] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for determining the strength of a structural member, characterized in that: The method comprises: Simulate the load variation curve of the target point over time; wherein the target point is the key connection point of the structural member; Determining a target period based on the change curve; wherein the target period is a period during which the structural member is in a target force mode, and the target force mode is a single force mode or a composite force mode of multiple force modes; Determining the moment at which the strain peak of the structural component occurs within the target period as the critical stress-bearing moment of the structural component; The strength of the structural member is determined based on the load of the target point at the critical force-bearing moment.

2. The strength determination method according to claim 1, characterized in that: The determining of the target time period based on the change curve includes: determining a possible force mode of the structural member based on the shape information of the structural member and the position information of the target point; The target time period is determined based on the possible stress mode of the structural component and the change curve.

3. The strength determination method according to claim 2, characterized in that: The determining, based on the shape information of the structural member and the position information of the target point, the possible force mode of the structural member includes: determining at least one target point combination corresponding to the structural member; determining, based on the shape information of the structural member and the position information of at least one target point included in the target point combination, a first force mode in which the structural member will be in when a load is applied to the target point included in the target point combination; The first stress mode is determined as the stress mode that the structural member may be in.

4. The strength determination method according to claim 2, characterized in that: The determining of the target time period based on the possible stress mode of the structural component and the change curve includes: Based on a time-varying curve of the load at each target point included in the structural member, determining each actual force mode of the structural member and the force start and end time of each force mode from the possible force modes of the structural member; Based on the actual force modes of the structural member and the force start and end times of the force modes, determining at least one force period in which the force modes of the structural member are completely the same at each moment; At least one of the stress-bearing time periods is determined as the target time period.

5. The strength determination method according to claim 4, characterized in that: The process of determining the strain peak value of the structural component within the target time period includes: Determining stress field distribution information of each target point involved in the target force pattern at each moment in the target period based on a load variation curve of each target point involved in the target force pattern in the target period; determining the strain value of the structural component at each moment in the target time period based on the stress field distribution information; The maximum value among the strain values ​​is determined as the strain peak value of the structural component within the target time period.

6. The strength determination method according to claim 5, characterized in that: The method of determining the stress field distribution information of each target point involved in the target force pattern at each moment in the target period based on the change curve of each target point involved in the target force pattern in the target period includes: inputting the change curve of each target point involved in the target force pattern in the target period, the shape information and the target force pattern into a stress analysis model to obtain the stress field distribution information of each target point involved in the target force pattern at each moment in the target period.

7. The strength determination method according to any one of claims 1 to 6, characterized in that: The method further comprises: The durability of the structural component is determined based on the load of the target point at the critical stress moment.

8. A device for determining the strength of a structural member, characterized in that: The strength determination device includes: a simulation unit, a first determination unit, a second determination unit and a third determination unit; The simulation unit is used to simulate the load variation curve of the target point over time; wherein the target point is a key connection point of the structural member; The first determining unit is configured to determine a target period based on the change curve; wherein the target period is a period during which the structural member is in a target force mode, and the target force mode is a single force mode or a composite force mode of multiple force modes; The second determining unit is further configured to determine the moment at which the strain peak of the structural component occurs within the target period as the critical stress-bearing moment of the structural component; The third determining unit is further configured to determine the strength of the structural component based on the load of the target point at the critical force-bearing moment.

9. A vehicle, characterized in that: The vehicle uses the strength determination device according to claim 8 to determine the strength of the vehicle structural parts.

10. An electronic device, characterized in that: including memory and processor; The memory is coupled to the processor; The memory is used to store computer program code, wherein the computer program code includes computer instructions; When the processor executes the computer instructions, the electronic device performs the strength determination method according to any one of claims 1 to 7.

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