Vehicle loading and unloading equipment strength test method, device, equipment and storage medium

Abstract

The invention provides a vehicle loading and unloading equipment strength test method, device and equipment and a storage medium, and relates to the technical field of vehicle loading and unloading, and the vehicle loading and unloading equipment strength test method is applied to vehicle loading and unloading equipment. The vehicle loading and unloading equipment comprises at least one of a lifting type double-layer platform, an unpowered crawling ladder, power crawling ladder equipment and a multifunctional platform vehicle; the vehicle loading and unloading equipment strength test method comprises the following steps: respectively obtaining static stress of a dangerous section of vehicle loading and unloading equipment under a self-weight working condition and dynamic stress under a loading and unloading working condition; when the resultant force of the static stress and the dynamic stress is smaller than or equal to the preset allowable stress, it is judged that the vehicle loading and unloading equipment meets the strength requirement. According to the method, the strength of the vehicle loading and unloading equipment is analyzed and processed under the loading working condition and the loading and unloading working condition, and the accuracy of the strength test of the vehicle loading and unloading equipment can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle loading and unloading, and more particularly, to a method, device, equipment and storage medium for strength testing of vehicle loading and unloading equipment. Background Art

[0002] With the rapid development of the logistics industry, vehicle loading and unloading equipment is increasingly widely used in fields such as cargo transportation and warehousing management. As a key component in the logistics supply chain, it plays an irreplaceable role in improving cargo turnover efficiency, reducing labor costs, and ensuring operation safety. It not only directly affects the transportation efficiency but also indirectly affects the operation efficiency of the entire logistics system and customer satisfaction.

[0003] However, the experimental methods in the related art usually rely on static load tests, which results in a difference between the load on the vehicle loading and unloading equipment and the load during the actual vehicle loading and unloading process, affecting the accuracy of the strength test of the vehicle loading and unloading equipment. Summary of the Invention

[0004] The problem solved by the present invention is how to improve the accuracy of the strength test of vehicle loading and unloading equipment.

[0005] To solve the above problems, the present invention provides a method, device, equipment and storage medium for strength testing of vehicle loading and unloading equipment.

[0006] In a first aspect, the present invention provides a method for strength testing of vehicle loading and unloading equipment, which is applied to vehicle loading and unloading equipment, and the vehicle loading and unloading equipment includes at least one of a lifting double-layer platform, a non-powered climbing ladder, a powered climbing ladder device, and a multi-functional platform vehicle;

[0007] The method for strength testing of vehicle loading and unloading equipment includes:

[0008] Respectively obtain the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition;

[0009] When the resultant force of the static stress and the dynamic stress is less than or equal to a preset allowable stress, it is determined that the vehicle loading and unloading equipment meets the strength requirements.

[0010] Optionally, before respectively obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition, it includes:

[0011] Based on the finite element method, determine the stress value at the preset position of the vehicle loading and unloading equipment;

[0012] When the stress value is greater than the corresponding stress threshold, determine the preset position as the dangerous section.

[0013] Optionally, the separately obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition includes:

[0014] By applying a self-weight load to a preset area of the vehicle loading and unloading equipment, obtaining the static stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the self-weight condition;

[0015] By having a preset test vehicle perform loading and unloading operations on the vehicle loading and unloading equipment, obtaining the dynamic stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the loading and unloading operation condition.

[0016] Optionally, the obtaining the static stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the self-weight condition by applying a self-weight load to a preset area of the vehicle loading and unloading equipment includes:

[0017] S101, setting a preset self-weight load in the preset area of the vehicle loading and unloading equipment to make the vehicle loading and unloading equipment in the self-weight condition;

[0018] S102, collecting the initial static strain measurement value of the dangerous section under the self-weight condition through a static stress data collector;

[0019] Repeating step S101 and step S102 N times to obtain N corresponding initial static strain measurement values, determining the maximum of the initial static strain measurement values as the static strain measurement value, and determining the product of the static strain measurement value and a preset static elastic modulus as the static stress, where N is greater than or equal to 2.

[0020] Optionally, the obtaining the dynamic stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the loading and unloading operation condition by having a preset test vehicle perform loading and unloading operations on the vehicle loading and unloading equipment includes:

[0021] According to a preset test speed, controlling the test vehicle to perform loading and unloading operations on the vehicle loading and unloading equipment, and collecting the loading and unloading dynamic strain measurement value of the dangerous section corresponding to the test speed through a dynamic data collector;

[0022] Determining the maximum of all the loading and unloading dynamic strain measurement values as the dynamic strain measurement value, and determining the dynamic stress through a preset dynamic stress relationship.

[0023] Optionally, the controlling the test vehicle to perform loading and unloading operations on the vehicle loading and unloading equipment and collecting the loading and unloading dynamic strain measurement value of the dangerous section corresponding to the test speed through a dynamic data collector includes:

[0024] When the test vehicle performs the loading and unloading operation in four-wheel drive mode, the first dynamic strain measurement value of the dangerous section is collected by the dynamic data collector;

[0025] When the test vehicle performs the loading and unloading operation in front-wheel drive mode, the second dynamic stress measurement value of the dangerous section is collected by the dynamic data collector;

[0026] Continue to perform the loading and unloading operation in the drive mode corresponding to the maximum measurement value among the first dynamic stress measurement value and the second dynamic stress measurement value, and collect the third dynamic strain measurement value of the dangerous section by the dynamic data collector;

[0027] Determine the maximum measurement value among the first dynamic strain measurement value, the second dynamic strain measurement value, and the third dynamic strain measurement value as the loading and unloading dynamic stress measurement value.

[0028] Optionally, the dynamic stress relationship satisfies:

[0029]

[0030] Wherein, σ is the dynamic stress, α is the full load weight of the test vehicle, β is the experimental full load weight of the test vehicle, ε is the dynamic strain measurement value, and E is the elastic modulus.

[0031] In a second aspect, the present invention provides a strength test device for a vehicle loading and unloading device, including:

[0032] An acquisition module for respectively acquiring the static stress of the dangerous section of the vehicle loading and unloading device under the self-weight condition and the dynamic stress under the loading and unloading operation condition;

[0033] A judgment module for judging that the vehicle loading and unloading device meets the strength requirement when the resultant force of the static stress and the dynamic stress is less than or equal to a preset allowable stress.

[0034] In a third aspect, the present invention provides an electronic device, including a memory and a processor;

[0035] The memory is used for storing a computer program;

[0036] The processor is used for implementing the strength test method for the vehicle loading and unloading device as described in the first aspect when executing the computer program.

[0037] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the strength test method for the vehicle loading and unloading device as described in the first aspect is implemented.

[0038] The beneficial effects of the vehicle loading and unloading equipment strength test method, device, equipment and storage medium of the present invention are as follows: By obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition, the static and dynamic stress states borne by the vehicle loading and unloading equipment during actual operation can be obtained. Comparing the resultant force of the static stress and the dynamic stress at the dangerous section with the preset allowable stress, if the resultant force is less than or equal to the allowable stress, it is determined that the vehicle loading and unloading equipment meets the requirements of unclogging, which can ensure that the vehicle loading and unloading equipment will not cause structural damage due to excessive stress, such as fracture, severe deformation, etc. under various working conditions, effectively avoiding the occurrence of safety accidents and ensuring the personal safety of operators and the safety of the equipment surrounding environment. Moreover, the vehicle loading and unloading equipment includes at least one combination of a lifting double-layer platform, a non-powered ladder, a powered ladder equipment and a multi-functional platform vehicle. Therefore, for the vehicle loading and unloading equipment composed of different equipment combinations, the stress condition during its operation is more complex, and the stress distribution generated by the coordinated work of each equipment is very different from that of a single equipment. Through the strength test prevention of this embodiment, the strength performance of the equipment during actual operation can be accurately controlled, structural hidden dangers can be detected in advance, safety accidents caused by insufficient strength can be prevented, and the safety of personnel, equipment and goods can be ensured. At the same time, the test results can be used to optimize the equipment combination design, improve the reliability and operation efficiency of the equipment, meet diverse operation requirements, and reduce long-term maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic flow chart of a vehicle loading and unloading equipment strength test method according to an embodiment of the present invention;

[0040] Figure 2 is a schematic structural diagram of a vehicle loading and unloading equipment according to an embodiment of the present invention;

[0041] Figure 3 is a schematic flow chart of the static stress test of the self-weight load according to an embodiment of the present invention;

[0042] Figure 4 is a schematic structural diagram of a vehicle loading and unloading equipment strength test device according to an embodiment of the present invention;

[0043] Figure 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

[0044] DESCRIPTION OF THE REFERENCE NUMERALS

[0045] 1 - Lifting double-layer platform; 2 - Non-powered ladder; 3 - Powered ladder equipment; 4 - Multi-functional platform vehicle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not used to limit the protection scope of the present invention.

[0047] It should be understood that the various steps described in the method embodiments of the present invention can be executed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this regard.

[0048] The term "including" and its variants used herein are open-ended, that is, "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules, or units, and are not used to limit the order or mutual dependence relationship of the functions performed by these devices, modules, or units.

[0049] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless clearly stated otherwise in the context, it should be understood as "one or more".

[0050] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only for illustrative purposes and are not used to limit the scope of these messages or information.

[0051] In the related art, the strength test methods of traditional vehicle loading and unloading equipment usually rely on static load tests. For example, conducting a strength test on the vehicle loading and unloading equipment by loading the rated load, or conducting a static pressure test on the loading and unloading platform. Although these tests can provide some basic strength information, they cannot simulate the complex stress states under actual loading and unloading operation conditions. In actual loading and unloading operations, the equipment is subjected to the superposition of multiple factors such as dynamic impact, fatigue wear, and vibration. Static tests cannot reflect the influence of these dynamic factors, resulting in a deviation between the test results and the actual usage situation, and affecting the accuracy of the strength assessment of the vehicle loading and unloading equipment.

[0052] In view of the problems existing in the above related technologies, this embodiment provides a method, device, equipment and storage medium for the strength test of a vehicle loading and unloading device.

[0053] As Figure 1 and Figure 2 shown, a method for the strength test of a vehicle loading and unloading device provided by an embodiment of the present invention is applied to a vehicle loading and unloading device, and the vehicle loading and unloading device includes at least one of a lifting double-layer platform 1, a non-powered ladder 2, a powered ladder device 3 and a multi-functional platform vehicle 4;

[0054] Specifically, the vehicle loading and unloading device of the present invention is designed modularly and includes at least one of a lifting double-layer platform 1, a non-powered ladder 2, a powered ladder device 3 and a multi-functional platform vehicle 4. Each component can be combined as needed to meet the application scenarios of different loading and unloading working conditions, and can realize the efficient vehicle transfer from the ground to the transport carriage, covering various working condition requirements, solving the problems of low traditional loading and unloading efficiency and poor adaptability, and significantly improving the automation and intelligence level of vehicle loading and unloading. Among them, the lifting double-layer platform 1 has upper and lower working spaces. The upper layer is used for vehicle docking and loading and unloading, and the lower layer can temporarily store vehicles to be loaded and unloaded. It realizes height adjustment through a lifting mechanism and can accurately match the cargo box heights of different types of vehicles (such as trucks, train carriages). During operation, the upper platform serves as a passage for vehicles to drive in or out, and the lower space can pre-park vehicles to be transported. Through the linkage of the upper and lower layers, the vehicle loading and unloading efficiency is greatly improved, and the space occupation is reduced. It is especially suitable for large-scale vehicle transfer scenarios, such as automobile logistics parks; the non-powered ladder 2 is designed with a mechanical structure and does not require external power drive. Its main body is an inclined channel, and sliding assistance structures (such as rollers, slides) are arranged on the surface. By using the vehicle's own weight or manual pushing, the vehicle can slide smoothly along the ladder. This ladder has a simple structure and low maintenance cost, and is suitable for short-distance and small-slope loading and unloading scenarios, such as small freight stations, temporary loading and unloading points, and can quickly build a passage to complete the transfer of vehicles from the ground to the transport carriage; the powered ladder device 3 integrates a power drive system and drives the ladder to run through a motor or a hydraulic device. The ladder has functions of automatic telescension and angle adjustment, and can dynamically adjust its posture according to the vehicle position. During operation, the powered ladder actively extends to the position of the target vehicle, and the vehicle can automatically drive along the power-driven ladder to the transport carriage without manual pushing, significantly improving the degree of loading and unloading automation, and is suitable for the efficient loading and unloading of large vehicles and heavy vehicles, reducing labor costs and operation risks; the multi-functional platform vehicle 4 is a movable integrated operation platform that integrates functions such as lifting, driving, and positioning. It has flexible mobility and can quickly reach the loading and unloading position. It docks with transport carriages of different heights through its own lifting structure. Anti-slip and positioning devices are arranged on the surface of the platform vehicle to ensure the stability of the vehicle during loading and unloading. It can also be equipped with auxiliary loading and unloading tools (such as a traction mechanism), and is suitable for diversified scenarios, such as outdoor temporary loading and unloading, multi-vehicle mixed operation, improving the versatility and operation flexibility of the equipment.

[0055] The vehicle loading and unloading equipment strength test method includes:

[0056] S100, respectively obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the deadweight working condition and the dynamic stress under the loading and unloading working condition.

[0057] Specifically, the vehicle loading and unloading equipment is structurally analyzed, such as the connection between the support column and the platform of the lifting double-layer platform 1, the bend of the ladder body of the unpowered ladder 2 and the powered ladder, and the wheel support structure of the multi-functional platform vehicle 4. These parts are subjected to large stress during work and are prone to damage. Finite element analysis software can also be used to simulate the stress conditions of the equipment under different working conditions and intuitively find dangerous sections where stress is concentrated. Understand the material properties of each component of the equipment in detail, including elastic modulus, Poisson's ratio, etc., to provide data support for subsequent stress calculations. Data collection is performed through high-precision stress measuring instruments, such as resistance strain gauges, static stress data acquisition instruments, and dynamic stress data acquisition instruments. Resistance strain gauges are used to sense the strain caused by stress and are set at selected dangerous sections. Static stress data acquisition instruments and dynamic stress data acquisition instruments can collect and process the static strain signals and dynamic strain signals of the strain gauges at the dangerous sections.

[0058] Furthermore, the deadweight load can be added to the vehicle loading and unloading equipment by loading sandbags, so that the vehicle loading and unloading equipment is under deadweight working conditions, that is, the loaded sandbags are used to simulate the load of the vehicle loading and unloading equipment itself, which is usually in the context of a special equivalent or supplementary simulation of its own load, and is not completely equivalent to its actual own load. At the same time, a resistance strain gauge is pasted at the dangerous section, and the strain gauge will change its resistance value as the structure deforms. The strain gauge is connected to the strain measurement circuit, and a static stress data acquisition instrument is used to collect the strain measurement value of the strain gauge at the dangerous section of the vehicle loading and unloading equipment under deadweight working conditions, so as to obtain the static stress of the dangerous section under deadweight working conditions by multiplying the strain measurement value and the elastic modulus of the material corresponding to the dangerous section.

[0059] Furthermore, the stress change of the vehicle loading and unloading equipment under the loading and unloading operation conditions can be simulated by performing the loading and unloading operations on the vehicle loading and unloading equipment with a test vehicle. Among them, the test vehicle needs to meet the test requirements. For example, according to the requirements of the test for the load-bearing capacity and the vehicle's own weight, a commercial vehicle with a self-weight less than about 800 kg of the test load (such as 3.5 t) needs to be selected. Finally, a vehicle with a full-load weight of 3.2 t is selected. Since there may be a difference between the actual load of the vehicle and the selected full-load weight, sandbag counterweight operation needs to be carried out on the selected vehicle. First, use a weighbridge to measure the self-weight of the loaded commercial vehicle, and determine the required number of sandbags (25 kg per bag) according to the difference between the self-weight and the full-load weight. After loading the sandbags into the loaded commercial vehicle, use the weighbridge to measure the full-load weight of the vehicle again until the required 3.2 t is reached. Then, adjust the sandbag distribution by measuring the front and rear axle load ratios. The measurement method is to measure the front and rear axle load ratios by the strain method. When the loading vehicle is fully loaded, first let the front wheels drive onto the specified position of the test equipment's ferry plate, and use a static data acquisition instrument to collect the strain values. Then, let the rear wheels drive onto the specified position of the ferry plate and collect the corresponding strain values. The ratio of the two strain values is the front and rear axle load ratio. The adjustment process is to change the front and rear axle load distribution by adjusting the position of the sandbags in the vehicle. This test can be repeated multiple times until the axle load ratio reaches a stable value and meets the required ratio of 5:7 for the test. Such an operation can ensure that the load distribution of the loaded commercial vehicle in the test conforms to the test setting standard, making the test data more accurate and reliable. Under the loading and unloading operation conditions, the corresponding dynamic strain measurement values at the dangerous section are collected by a dynamic data acquisition instrument. Then, the dynamic stress at the dangerous section under the loading and unloading operation conditions is obtained by multiplying the dynamic strain measurement values by the elastic modulus of the material corresponding to the dangerous section. The total weight is obtained by simulating the static and dynamic conditions on the vehicle loading and unloading equipment respectively, so as to obtain the accurate static stress and dynamic stress corresponding to the dangerous section in the vehicle loading and unloading equipment.

[0060] S200, when the resultant force of the static stress and the dynamic stress is less than or equal to a preset allowable stress, it is determined that the vehicle loading and unloading equipment meets the strength requirements.

[0061] Specifically, by adding the static stress and the dynamic stress obtained at the dangerous section, the resultant force of the stress at the dangerous section is obtained, and this resultant force is compared with the preset allowable stress. When the resultant force is less than or equal to the allowable stress, it means that the vehicle loading and unloading equipment can withstand the load during vehicle loading and unloading, that is, the vehicle loading and unloading equipment meets the strength requirements during vehicle loading and unloading. When the resultant force is greater than the required stress, it means that the vehicle loading and unloading equipment cannot withstand the load received during actual vehicle loading and unloading work and cannot meet the strength requirements for the vehicle loading and unloading equipment.

[0062] In this embodiment, by obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition, the static and dynamic stress states borne by the vehicle loading and unloading equipment during actual operation can be obtained. Comparing the resultant force of the static stress and the dynamic stress at the dangerous section with the preset allowable stress, if the resultant force is less than or equal to the allowable stress, it is determined that the vehicle loading and unloading equipment meets the requirements of clog clearing, which can ensure that the vehicle loading and unloading equipment will not suffer structural damage due to excessive stress, such as fracture, severe deformation, etc. under various working conditions, effectively avoiding the occurrence of safety accidents and ensuring the personal safety of operators and the safety of the surrounding environment of the equipment. Moreover, the vehicle loading and unloading equipment includes at least one combination of a lifting double-layer platform 1, a non-powered ladder 2, a powered ladder equipment 3, and a multi-functional platform vehicle 4. Therefore, for the vehicle loading and unloading equipment composed of different equipment combinations, the stress conditions during its operation are more complex, and the stress distribution generated by the coordinated work of each equipment is very different from that of a single equipment. Through the strength test prevention of this embodiment, the strength performance of the equipment during actual operation can be accurately controlled, potential structural hazards can be detected in advance, safety accidents caused by insufficient strength can be prevented, and the safety of personnel, equipment, and goods can be ensured. At the same time, the test results can be used to optimize the equipment combination design, improve the reliability and operation efficiency of the equipment, meet diverse operation requirements, and reduce long-term maintenance costs.

[0063] Optionally, before respectively obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition, it includes:

[0064] Based on the finite element method, determine the stress value at the preset position of the vehicle loading and unloading equipment;

[0065] When the stress value is greater than the corresponding stress threshold, determine the preset position as the dangerous section.

[0066] Specifically, the process of establishing the finite element model includes:

[0067] Geometric modeling: Use professional three-dimensional modeling software to accurately construct the geometric model of the vehicle loading and unloading equipment. For the vehicle loading and unloading equipment with different combinations including a lifting double-layer platform, a non-powered ladder, a powered ladder equipment, and a multi-functional platform vehicle, it is necessary to detail the shapes, sizes of each component and their connection relationships. For example, accurately depict the support structure and platform size of the lifting double-layer platform, the inclination angle and ladder body length of the non-powered ladder, the driving device and transmission track of the powered ladder equipment, and the vehicle body structure and operation platform of the multi-functional platform vehicle.

[0068] Material property definition: Accurately assign material properties to each component in the model, including elastic modulus, Poisson's ratio, density, etc. These material properties determine the mechanical response of the device when subjected to forces. For example, if the main structure of the device is made of steel, its parameters such as elastic modulus and Poisson's ratio need to be obtained from the material handbook according to the actual steel model and accurately input into the finite element model.

[0069] Mesh generation: Mesh the constructed geometric model, discretizing the continuous solid structure into a finite number of small elements, such as tetrahedral elements, hexahedral elements, etc. The quality of mesh generation has an important impact on the accuracy of the calculation results. Encryption processing is required in key parts (such as connection points and areas where stress concentration may occur). Taking the connection part between the power climbing ladder device and the platform as an example, this area is subjected to complex forces during the operation of the device, and a finer mesh generation should be used to improve the calculation accuracy.

[0070] Loading and boundary condition setting

[0071] Loading: Apply corresponding loads to the model according to the actual working conditions of the vehicle loading and unloading equipment. Under the self-weight condition, apply gravitational acceleration to simulate the self-weight of the equipment; under the loading and unloading operation condition, consider the impact force when the vehicle drives in and out and the dynamic load of cargo loading and unloading. For example, when simulating a vehicle quickly driving onto the power climbing ladder, the impact force needs to be calculated based on the vehicle's speed and mass and applied as a dynamic load to the corresponding position of the climbing ladder.

[0072] Boundary conditions: Define the boundary conditions that conform to the actual support or constraint conditions for each component in the model. For example, at the contact between the support legs of the lifting double-deck platform and the ground, it can be set as a fixed constraint to restrict translation and rotation in three directions; for the connection points between the non-powered climbing ladder and the ground or other structures, set the corresponding constraint conditions according to the actual connection method, such as hinge constraints, etc.

[0073] Solution calculation: After completing the model establishment, loading, and boundary condition setting, use finite element analysis software for solution calculation. The software solves the mechanical equations of each element through numerical calculation methods, and then obtains the stress distribution of the entire model. During the calculation process, the calculation accuracy and convergence conditions can be set as needed to ensure the reliability of the calculation results. Through the solution, the stress values at any position on the vehicle loading and unloading equipment can be obtained, that is, the stress values at the preset positions. The preset positions can also be selected as the key positions on the vehicle loading and unloading equipment that bear external forces. This stress value reflects the stress magnitude borne by this position under specific working conditions. Abnormalities at this key position may pose safety hazards and even cause structural damage and inability to work properly, leading to safety accidents.

[0074] Stress threshold determination

[0075] The stress threshold is an important basis for judging the safety of the equipment, and its determination needs to comprehensively consider various factors. On the one hand, the mechanical property parameters of the materials used in the equipment, such as yield strength, tensile strength, etc., should be referred to. Generally speaking, the stress threshold will be set below the critical stress value at which the material begins to undergo plastic deformation or failure to ensure that the equipment has sufficient safety margin. On the other hand, factors such as the design life of the equipment, the use environment, and the uncertainty factors in actual operation also need to be considered. For example, for vehicle loading and unloading equipment that is frequently used in harsh environments (such as high temperature, high humidity), its stress threshold may be set relatively low to cope with the influence of environmental factors on material properties.

[0076] Determination of dangerous section

[0077] When the stress value at the preset position obtained by finite element calculation is greater than the corresponding stress threshold, the preset position can be determined as a dangerous section. A dangerous section means that the stress level of the equipment at this position is relatively high, exceeding the safety range, and there is a greater risk of structural failure. For example, during the finite element analysis of a lifting double-deck platform, it is found that the stress value at the connection between the support column and the upper platform exceeds the stress threshold, then this connection is determined as a dangerous section. Once the equipment bears excessive stress at this position during actual operation for a long time, it may lead to structural deformation, crack generation or even fracture, seriously affecting the safety and reliability of the equipment. After determining the dangerous section, it can be further analyzed in detail, such as studying the reasons for stress concentration, considering measures such as strengthening the structure, replacing materials or optimizing the design to reduce the stress level and ensure the safe operation of the equipment.

[0078] Optionally, the steps of respectively obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition include:

[0079] By loading the self-weight load on the preset area of the vehicle loading and unloading equipment, the static stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the self-weight condition is obtained;

[0080] By having a preset test vehicle perform loading and unloading operations on the vehicle loading and unloading equipment, the dynamic stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the loading and unloading operation condition is obtained.

[0081] Specifically, a self-weight load is applied to the preset area of the vehicle loading and unloading equipment in the form of loading sandbags to simulate the situation where the equipment bears its own weight during actual use, that is, to make the vehicle loading and unloading equipment in the self-weight working condition, so as to obtain the static stress corresponding to the dangerous section of the vehicle loading and unloading equipment in the self-weight working condition. Then, through the loading and unloading operation simulation of loading and unloading the test vehicle prepared in advance on the vehicle loading and unloading equipment, the vehicle loading and unloading equipment is made to be in the loading and unloading operation working condition, so as to obtain the dynamic stress corresponding to the dangerous section of the vehicle loading and unloading equipment in the loading and unloading operation working condition.

[0082] In this optional embodiment, loading sandbags is used to simulate the self-weight working condition, and a test vehicle is used to simulate the loading and unloading operation, highly restoring the two key working conditions of the equipment during actual use, making the test environment highly consistent with the real scenario, and greatly improving the degree of reflection of the test results on the actual situation. Moreover, by accurately obtaining the stress conditions under different working conditions, the evaluation of the strength of the vehicle loading and unloading equipment can comprehensively consider the stress performance of the equipment under various actual operating states, and then can more comprehensively and accurately judge whether the equipment strength meets the actual use requirements, providing a solid basis for the optimal design and safe operation of the equipment.

[0083] As Figure 3 shown, optionally, the obtaining of the static stress corresponding to the dangerous section of the vehicle loading and unloading equipment in the self-weight working condition by applying a self-weight load to the preset area of the vehicle loading and unloading equipment includes:

[0084] S101, setting a preset self-weight load in the preset area of the vehicle loading and unloading equipment to make the vehicle loading and unloading equipment in the self-weight working condition;

[0085] S102, collecting the initial static strain measurement value of the dangerous section under the self-weight working condition through a static stress data collector;

[0086] Steps S101 and S102 are repeated N times to obtain the corresponding N initial static strain measurement values, and the largest of the initial static strain measurement values is determined as the static strain measurement value, and the product of the static strain measurement value and the preset static elastic modulus is determined as the static stress, where N is greater than or equal to 2.

[0087] Specifically, the state of the equipment bearing its own weight during actual use is simulated by setting a preset self-weight load in a preset area. Among them, the self-weight load can be pre-made sandbags, and the weights of these sandbags are unified (25 kg per bag). The preset area can be the key parts determined in advance according to the structural characteristics and mechanical analysis of the equipment. These parts are usually the places where stress concentration may occur or have an important impact on the overall structural stability when the equipment bears its own weight. For example, the connection between the support columns and the platform of the lifting double-layer platform, the support points of the non-powered ladder and the powered ladder, and the key load-bearing beams of the chassis of the multi-functional platform vehicle and other positions. In actual operation, loading can be achieved by placing heavy objects equivalent to the self-weight of each part of the equipment in the preset area, such as using sandbags, counterweights, etc. For example, for a specific vehicle loading and unloading equipment, after calculation, it is known that a certain key support part bears a certain weight under its own weight. Then, sandbags of the corresponding weight can be placed near this part to make the equipment in an equivalent self-weight working condition for subsequent stress measurement. This loading method can more realistically simulate the stress situation of the equipment during actual operation and lay a foundation for accurately obtaining the static stress. After the vehicle loading and unloading equipment is loaded with the self-weight load in the preset area and stabilized, a static stress data collector is used to collect the initial static strain measurement value of the dangerous section. This measurement value reflects the strain situation generated by the dangerous section under the current self-weight load.

[0088] Furthermore, due to the possible existence of some interference factors during the test process, such as environmental vibration, small errors of the measuring instrument, etc., the data measured once may not be accurate enough, so multiple measurements are required. Therefore, by repeating the process of loading the self-weight and collecting the strain measurement values N times, N initial static strain measurement values after reloading the self-weight can be obtained. Multiple measurements can effectively reduce the measurement error and improve the reliability of the data. Among these N measurement values, the largest initial static strain measurement value is selected as the static strain measurement value. Because the maximum strain value often represents the most unfavorable stress situation of the dangerous section under the self-weight working condition, calculating the static stress based on it can more conservatively and safely evaluate the strength of the equipment under its own weight. For example, if among the 3 measurements, the initial static strain measurement value obtained in the 3rd measurement is the largest, then this value is determined as the static strain measurement value.

[0089] Optionally, the step of obtaining the dynamic stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the loading and unloading operation condition by performing the loading and unloading operation on the vehicle loading and unloading equipment with a preset test vehicle includes:

[0090] According to the preset test speed, control the preset test vehicle to perform the loading and unloading operation on the vehicle loading and unloading equipment, and collect the loading and unloading dynamic strain measurement value of the dangerous section corresponding to the test speed through a dynamic data collector;

[0091] Determine the maximum handling dynamic strain measurement value among all the handling dynamic strain measurement values as the dynamic strain measurement value, and determine the dynamic stress through a preset dynamic stress relationship.

[0092] Specifically, in the strength test of vehicle handling equipment, the preset test speed is determined according to the actual usage scenario and equipment performance. For example, considering the common driving speed range of the vehicle during actual handling and the expected operating conditions during equipment design, different speed levels such as 10 km / h, 15 km / h, 20 km / h, etc. are set as the preset test speeds. These speeds cover the possible driving speed situations of the vehicle during handling operations, which helps to comprehensively evaluate the performance of the equipment under different working conditions.

[0093] During the test, control the test vehicle to perform handling operations on the vehicle handling equipment at the preset test speed. This handling process can include the process of getting on and off the vehicle, that is, the loading and unloading processes of the vehicle. Among them, getting on the vehicle can be carried out by driving forward, and getting off the vehicle can be carried out by reversing. This requires an accurate speed control device, such as the vehicle's own speed control system and the monitoring system of the test site to work together, to monitor and adjust the vehicle speed in real time to keep it stable at the preset value. For example, an electronic throttle control system and a speed sensor can be used. When the vehicle speed approaches the preset speed, the throttle opening is automatically adjusted to ensure that the vehicle travels at a constant speed to simulate the real handling operation process. This can ensure the consistency and comparability of each test, so that the collected data can accurately reflect the stress situation of the equipment at a specific speed.

[0094] Strain gauges are pre-installed at the dangerous sections of vehicle loading and unloading equipment. The strain gauges can convert the tiny strains generated by the dangerous sections during loading and unloading operations into electrical signal changes. The dynamic data acquisition instrument is connected to the strain gauges and is responsible for real-time acquisition of these changing electrical signals and converting them into digital strain measurement values. During the installation process, it is necessary to ensure that the strain gauges are accurately pasted in the correct position to truly reflect the strain conditions of the dangerous sections, and at the same time ensure that the parameters of the dynamic data acquisition instrument are correctly set, such as sampling frequency, filtering parameters, etc., to accurately collect and process data. For example, for high-frequency dynamic strain signals, a higher sampling frequency needs to be set to avoid signal loss and ensure that the collected data can accurately reflect the changing trend of dynamic strain. When the test vehicle is loading and unloading on the vehicle loading and unloading equipment at a preset speed, the dangerous section will generate strain due to dynamic processes such as the vehicle getting on and off. The dynamic data acquisition instrument collects these strain signals in real time and records them to obtain the loading and unloading dynamic strain measurement values ​​corresponding to each preset test speed. The dynamic strain measurement value can be the maximum strain value generated during the two loading and unloading processes of getting on and off, or the average of the two strain values ​​generated during the getting on and off processes. These measurements reflect the dynamic strain caused by loading and unloading operations on dangerous sections at different speeds, and provide raw data for the subsequent determination of dynamic stress.

[0095] Furthermore, after completing the loading and unloading operations at all preset test speeds and collecting the corresponding loading and unloading dynamic strain measurement values, find the maximum loading and unloading dynamic strain measurement value from all the measurement values ​​and determine it as the dynamic strain measurement value. The reason for selecting the maximum value is that it represents the worst strain condition that the dangerous section is subjected to during the test, and can reflect the maximum dynamic strain condition that the equipment may face during loading and unloading operations. For example, multiple tests are carried out at different speeds, and a series of loading and unloading dynamic strain measurement values ​​are obtained. The largest value is found by comparison, and this value is used as the key data for the subsequent calculation of dynamic stress.

[0096] In this optional embodiment, by presetting the test speed and controlling the test vehicle to load and unload the equipment at this speed, the different driving speeds of the vehicle in the actual loading and unloading scene can be simulated. The vehicle speed varies in actual operation. By setting multiple preset speed tests, the common speed range is covered, so that the test results are closer to the actual situation, ensuring that the collected data can accurately reflect the strain of the equipment in actual use, and improving the accuracy of the test. Selecting the maximum value from all loading and unloading dynamic strain measurement values ​​as the dynamic strain measurement value takes into account the worst strain conditions that the equipment may face during loading and unloading operations. In actual operation, the equipment will occasionally be subjected to strains beyond normal levels. Calculating the dynamic stress with the maximum value can more conservatively and safely evaluate the strength of the equipment, ensure that the equipment can operate safely under various working conditions, and avoid inaccurate test results due to ignoring extreme conditions.

[0097] Optionally, controlling the test vehicle to perform loading and unloading operations on the vehicle loading and unloading equipment, and collecting the measured dynamic strain values of the dangerous section corresponding to the test speed through a dynamic data collector, including:

[0098] When the test vehicle performs the loading and unloading operations in four-wheel drive mode, collecting the first dynamic strain measurement value of the dangerous section through the dynamic data collector;

[0099] When the test vehicle performs the loading and unloading operations in front-wheel drive mode, collecting the second dynamic stress measurement value of the dangerous section through the dynamic data collector;

[0100] Continuing to perform the loading and unloading operations in the drive mode corresponding to the maximum measured value among the first dynamic stress measurement value and the second dynamic stress measurement value, and collecting the third dynamic strain measurement value of the dangerous section through the dynamic data collector;

[0101] Determining the maximum measured value among the first dynamic strain measurement value, the second dynamic strain measurement value, and the third dynamic strain measurement value as the measured dynamic strain value.

[0102] Specifically, when testing the vehicle loading and unloading equipment, first let the test vehicle perform the loading and unloading operations in four-wheel drive mode. In four-wheel drive mode, all four wheels of the vehicle can provide driving force. This driving mode will make the power distribution and driving characteristics of the vehicle during loading and unloading different from other driving modes, and thus generate unique forces on the vehicle loading and unloading equipment. During the operation, through the dynamic data collector connected to the strain gauges on the dangerous section, the strain data of the dangerous section is collected in real time to obtain the first dynamic strain measurement value. This measurement value reflects the strain situation of the dangerous section under the working condition of four-wheel drive loading and unloading operations. For example, during the process of the vehicle driving onto the transport vehicle through the power ladder, four-wheel drive may make the vehicle accelerate more smoothly, but it may also generate a special stress distribution on the equipment structure such as the ladder due to the simultaneous exertion of the four wheels. The first dynamic strain measurement value records the strain response of the dangerous section in this case.

[0103] Then, let the test vehicle switch to front-wheel drive mode to perform the loading and unloading operations. When in front-wheel drive, only the front wheels provide driving force, the controllability and power transmission mode of the vehicle change, and the forces on the vehicle loading and unloading equipment will also change. Similarly, use the dynamic data collector to collect the strain data of the dangerous section to obtain the second dynamic strain measurement value. This value reflects the strain situation of the dangerous section under the working condition of front-wheel drive loading and unloading operations. For example, when the vehicle drives away from the lift double-deck platform in front-wheel drive, the characteristics of the vehicle's center of gravity transfer and driving force distribution in front-wheel drive mode will cause different stresses on the dangerous section, and the second dynamic strain measurement value captures these changes.

[0104] Further, compare the magnitudes of the first dynamic strain measurement value and the second dynamic strain measurement value, and select the driving mode corresponding to the maximum measurement value to continue the test. The reason for choosing the driving mode corresponding to the maximum measurement value to continue the test is that this driving mode caused a greater strain in the dangerous section during the previous test and is more likely to represent the working condition where the equipment bears a large stress during actual loading and unloading operations. For example, if the first dynamic strain measurement value is greater than the second dynamic strain measurement value, continue to use the four-wheel drive mode for subsequent tests; otherwise, use the front-wheel drive mode. After determining the driving mode, continue to perform the loading and unloading operation using this driving mode, and collect the strain data of the dangerous section again through the dynamic data acquisition instrument to obtain the third dynamic strain measurement value. This step is to further obtain the strain data of the dangerous section under this relatively unfavorable working condition on the basis of the previous test, increasing the richness and reliability of the data. Since the driving mode that caused a greater strain in the dangerous section is continued to be used, the third dynamic strain measurement value may further reflect the strain situation of the equipment under extreme or relatively harsh working conditions. Compare the first dynamic strain measurement value, the second dynamic strain measurement value, and the third dynamic strain measurement value, and determine the maximum measurement value as the loading and unloading dynamic stress measurement value. The reason for choosing the maximum value as the final measurement result is from the perspective of safety and conservatism, considering that the equipment may encounter various complex working conditions during actual use, and this maximum measurement value represents the most severe strain situation that the dangerous section bears under different driving mode tests. By calculating the dynamic stress using the strain measurement value under this most unfavorable condition, the strength and safety of the vehicle loading and unloading equipment during the loading and unloading operation can be evaluated more strictly, ensuring that the equipment can meet the usage requirements under various actual working conditions and avoiding potential safety hazards caused by underestimating the stress borne by the equipment.

[0105] In this optional embodiment, by allowing the test vehicle to perform the loading and unloading operation in two modes: four-wheel drive and front-wheel drive, and utilizing the differences in vehicle power distribution and driving characteristics under different driving modes, the strain values of the dangerous section are collected to comprehensively reflect the stress changes of the equipment caused by different vehicle driving modes, avoiding the limitations of single-driving-mode tests and enhancing the comprehensiveness of the test results. At the same time, the dynamic strain measurement values are collected multiple times under different conditions, increasing the number and diversity of test samples. By comparing and screening the data, accidental factors and errors are effectively reduced, making the determined loading and unloading dynamic stress measurement value more truly reflect the strain of the dangerous section during the equipment loading and unloading operation, providing reliable data for accurately calculating the dynamic stress and evaluating the equipment strength, and improving the accuracy of the entire test.

[0106] Optionally, the dynamic stress relationship satisfies:

[0107]

[0108] Wherein, σ is the dynamic stress, α is the full load weight of the test vehicle, β is the experimental full load weight of the test vehicle, ε is the measured value of the dynamic strain, and E is the elastic modulus.

[0109] As Figure 4 shown, a model inference device 400 provided by an embodiment of the present invention includes:

[0110] An acquisition module 410, configured to respectively acquire the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition;

[0111] A judgment module 420, configured to judge that the vehicle loading and unloading equipment meets the strength requirement when the resultant force of the static stress and the dynamic stress is less than or equal to a preset allowable stress.

[0112] The model inference device of this embodiment is used to implement the vehicle loading and unloading equipment strength test method as described above. Its advantages compared with the prior art are the same as those of the vehicle loading and unloading equipment strength test method compared with the prior art, and will not be elaborated here.

[0113] As Figure 5 shown, an electronic device 500 provided by an embodiment of the present invention includes a memory 510 and a processor 520; the memory 510 is used to store a computer program; the processor 520 is used to implement the vehicle loading and unloading equipment strength test method as described above when executing the computer program.

[0114] Or, an electronic device 500 includes a memory 510 and a processor 520 coupled to the memory 510; the memory 510 is configured to store a computer program; the processor 520 is configured to perform the following operations when executing the computer program:

[0115] Respectively acquire the static stress of the dangerous section of the vehicle loading and unloading equipment under the self-weight condition and the dynamic stress under the loading and unloading operation condition;

[0116] When the resultant force of the static stress and the dynamic stress is less than or equal to a preset allowable stress, judge that the vehicle loading and unloading equipment meets the strength requirement.

[0117] A computer-readable storage medium provided by an embodiment of the present invention has a computer program stored thereon. When the computer program is executed by a processor, the vehicle loading and unloading equipment strength test method as described above is implemented.

[0118] Or, a non-volatile computer-readable storage medium has a computer program stored thereon. When the computer program is executed by a processor, the processor is caused to perform the following operations:

[0119] Obtain the static stress of the dangerous section of the vehicle loading and unloading equipment under its own weight condition and the dynamic stress under the loading and unloading operation condition respectively;

[0120] When the resultant force of the static stress and the dynamic stress is less than or equal to a preset allowable stress, it is determined that the vehicle loading and unloading equipment meets the strength requirement.

[0121] Now, an electronic device 500 that can be a server or a client of the present invention will be described. It is an example of a hardware device that can be applied to various aspects of the present invention. The electronic device 500 is intended to represent various forms of digital electronic computer devices, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device 500 can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0122] The electronic device 500 includes a computing unit that can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) or a computer program loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The computing unit, the ROM, and the RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0123] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc. In this application, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present invention. In addition, the functional units in each embodiment of the present invention can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0124] Although the present invention is disclosed as above, the scope of protection of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the scope of protection of the present invention.

Claims

1. A vehicle loading and unloading equipment strength test method, characterized in that: Applicable to vehicle loading and unloading equipment, the vehicle loading and unloading equipment includes at least one of a lifting double-layer platform, a non-powered ladder, a powered ladder device and a multi-functional platform vehicle; The vehicle loading and unloading equipment strength test method includes: Respectively obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under deadweight conditions and the dynamic stress under loading and unloading operation conditions; When the resultant force of the static stress and the dynamic stress is less than or equal to the preset allowable stress, it is determined that the vehicle loading and unloading equipment meets the strength requirement.

2. The vehicle loading and unloading equipment strength test method according to claim 1, characterized in that: Before respectively obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the deadweight working condition and the dynamic stress under the loading and unloading working condition, the method includes: Determining stress values ​​at preset positions of the vehicle loading and unloading equipment based on a finite element method; When the stress value is greater than the corresponding stress threshold, the preset position is determined as a dangerous section.

3. The vehicle loading and unloading equipment strength test method according to claim 1, characterized in that: The step of respectively obtaining the static stress of the dangerous section of the vehicle loading and unloading equipment under the deadweight working condition and the dynamic stress under the loading and unloading working condition comprises: By applying a deadweight load to a preset area of ​​the vehicle loading and unloading equipment, a static stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the deadweight working condition is obtained; A preset test vehicle is used to perform loading and unloading operations on the vehicle loading and unloading equipment to obtain the dynamic stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the loading and unloading operation conditions.

4. The vehicle loading and unloading equipment strength test method according to claim 3, characterized in that: The method of obtaining the static stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the deadweight working condition by loading the deadweight load on the preset area of ​​the vehicle loading and unloading equipment includes: S101, setting a preset deadweight load in a preset area of ​​the vehicle loading and unloading equipment, so that the vehicle loading and unloading equipment is in the deadweight working condition; S102, collecting initial static strain measurement values ​​of the dangerous section under the deadweight working condition by means of a static stress data acquisition instrument; Repeat step S101 and step S102 N times to obtain corresponding N initial static strain measurement values, and determine the largest initial static strain measurement value as the static strain measurement value, and determine the product of the static strain measurement value and a preset static elastic modulus as the static stress, where N is greater than or equal to 2.

5. The vehicle loading and unloading equipment strength test method according to claim 3, characterized in that: The method of performing loading and unloading operations on the vehicle loading and unloading equipment by a preset test vehicle to obtain the dynamic stress corresponding to the dangerous section of the vehicle loading and unloading equipment under the loading and unloading operation condition includes: According to a preset test speed, the test vehicle is controlled to perform loading and unloading operations on the vehicle loading and unloading equipment, and the loading and unloading dynamic strain measurement value of the dangerous section corresponding to the test speed is collected by a dynamic data acquisition instrument; The largest loading and unloading dynamic strain measurement value among all the loading and unloading dynamic strain measurement values ​​is determined as the dynamic strain measurement value, and the dynamic stress is determined through a preset dynamic stress relationship.

6. The vehicle loading and unloading equipment strength test method according to claim 5, characterized in that: The controlling the test vehicle to perform loading and unloading operations on the vehicle loading and unloading equipment, and collecting the loading and unloading dynamic strain measurement value of the dangerous section corresponding to the test speed through a dynamic data acquisition instrument, includes: When the test vehicle is carrying out the loading and unloading operation in a four-wheel drive mode, the first dynamic strain measurement value of the dangerous section is collected by the dynamic data acquisition instrument; When the test vehicle is carrying out the loading and unloading operation in a front-wheel drive mode, the second dynamic stress measurement value of the dangerous section is collected by the dynamic data acquisition instrument; Continue the loading and unloading operation by using the driving mode corresponding to the largest measurement value between the first dynamic stress measurement value and the second dynamic stress measurement value, and collect the third dynamic strain measurement value of the dangerous section by using the dynamic data acquisition instrument; The largest measurement value among the first dynamic strain measurement value, the second dynamic strain measurement value and the third dynamic strain measurement value is determined as the loading and unloading dynamic stress measurement value.

7. The vehicle loading and unloading equipment strength test method according to claim 5, characterized in that: The dynamic stress relationship satisfies: Wherein, σ is the dynamic stress, α is the full load weight of the test vehicle, β is the experimental full load weight of the test vehicle, ε is the dynamic strain measurement value, and E is the elastic modulus.

8. A vehicle loading and unloading equipment strength test device, characterized in that: include: An acquisition module, used to respectively acquire the static stress of the dangerous section of the vehicle loading and unloading equipment under deadweight conditions and the dynamic stress under loading and unloading conditions; The judgment module is used to judge whether the vehicle loading and unloading equipment meets the strength requirement when the resultant force of the static stress and the dynamic stress is less than or equal to the preset allowable stress.

9. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is used to implement the vehicle loading and unloading equipment strength test method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the vehicle loading and unloading equipment strength test method according to any one of claims 1 to 7 is implemented.

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