Two-dimensional similar test platform vehicle dynamic load applying device and method

Abstract

The invention provides a two-dimensional similarity test platform vehicle dynamic load applying device and method, and the device comprises a geological two-dimensional similarity test platform, a vehicle dynamic load simulation mechanism, and a data collection and analysis map recording device. The geological two-dimensional similarity test platform comprises a test bench main body structure, a geological model and a simulated road surface, the vehicle dynamic load simulation mechanism comprises a dynamic load applying device, the vehicle dynamic load simulation mechanism is connected with the test bench main body structure and located on the geological two-dimensional similarity test platform, and the dynamic load applying device is used for controlling the model vehicle to apply dynamic impact force and vibration load to the simulated road surface so as to simulate vehicle flow load; the data acquisition and analysis atlas recording device comprises a plurality of displacement monitoring modules and a plurality of stress monitoring modules, the displacement monitoring modules are used for detecting displacement parameters of the geologic model, and the stress monitoring modules are used for detecting stress parameters of the geologic model.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, and in particular to a two-dimensional similar test platform vehicle dynamic load application device and method. Background Art

[0002] Surface subsidence is a common geological phenomenon in the process of coal mining. Although its destructiveness is not as severe as that inside the mining area, it will also cause corresponding damage to various surface buildings, structures, roads, railways, industrial facilities, etc.

[0003] In the field of mining engineering research, people's research objects mainly focus on the interaction between underground mining activities and roads, while the field of road engineering focuses on the dynamic load of vehicles and the change law of roadbed and pavement settlement. It can be seen that in related studies, few researchers directly link the dynamic load factor of vehicles with the underground mining effect. Summary of the invention

[0004] The present invention provides a two-dimensional similar test platform vehicle dynamic load applying device and method, which are used to solve the defect that the vehicle dynamic load applying device in the prior art ignores the influence of dynamic load, and realizes accurate and efficient application of dynamic vehicle load.

[0005] The present invention provides a two-dimensional similar test platform vehicle dynamic load application device, comprising a geological two-dimensional similar test platform, a vehicle dynamic load simulation mechanism and a data acquisition and analysis atlas recording device; the geological two-dimensional similar test platform comprises a test platform main structure, a geological model and a simulated road surface; wherein the test platform main structure is used to carry the geological model and the simulated road surface internally, and the simulated road surface is located on the geological model; the vehicle dynamic load simulation mechanism comprises a dynamic load application device, the vehicle dynamic load simulation mechanism is connected to the test platform main structure, and is located on the geological two-dimensional similar test platform, and the dynamic load application device is used to control the model vehicle to apply dynamic impact force and vibration load to the simulated road surface to simulate vehicle flow load; the data acquisition and analysis atlas recording device comprises a plurality of displacement monitoring modules and a plurality of stress monitoring modules, the plurality of displacement monitoring modules and the plurality of stress monitoring modules are pre-buried in the geological model, the displacement monitoring module is used to detect the displacement parameters of the geological model, and the stress monitoring module is used to detect the stress parameters of the geological model.

[0006] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the geological model includes: a road base, a loess layer, a first silt layer, a fine sand layer, a second silt layer, a mudstone layer, a coal seam, and a sandy mudstone layer.

[0007] According to a two-dimensional similarity test platform vehicle dynamic load application device provided by the present invention, the geological two-dimensional similarity test platform also includes: an underground modular mining simulation unit, the underground modular mining simulation unit is located in the geological model, the underground modular mining simulation unit includes multiple single mining modules, and the single mining modules are used to extract according to preset rules to simulate underground mining.

[0008] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the underground modular mining simulation unit is located in the coal seam, and the single mining module is a coal block.

[0009] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the multiple displacement monitoring modules are respectively pre-buried in the loess layer, and the multiple stress detection modules are respectively pre-buried in the road base layer and the first silt sand layer.

[0010] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the test platform main structure includes: a bottom plate, a left guard plate and a right guard plate, the left guard plate latch is connected to the left side of the bottom plate, and the right guard plate latch is connected to the right side of the bottom plate.

[0011] According to a two-dimensional similar test platform vehicle dynamic load applying device provided by the present invention, the dynamic load applying device includes: a screw-driven traction mechanism and at least one simulated vehicle; the vehicle dynamic load simulation mechanism also includes: a plurality of connecting columns and a vehicle ring rail; one end of the plurality of connecting columns is respectively connected to the left guard plate and the right guard plate latch, and the other end of the plurality of connecting columns is fixed with the screw-driven traction mechanism, the vehicle ring rail covers the simulated road surface, and the screw-driven traction mechanism is located at a target height above the vehicle ring rail; the screw-driven traction mechanism is used to pull the at least one simulated vehicle according to the target traction mechanical parameters, so that the at least one simulated vehicle applies a target dynamic impact force and a target vibration load to the vehicle ring rail to simulate the vehicle flow load.

[0012] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the data acquisition and analysis graph recording device also includes: a data integration and analysis module, which is used to record the displacement parameters detected by the displacement monitoring module and the stress parameters detected by the stress monitoring module.

[0013] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the data integration and analysis module is also used to determine the analysis results of ground stress and vehicle flow load based on the traction mechanics parameters, the displacement parameters and the stress parameters.

[0014] The present invention also provides a method for applying dynamic load to a vehicle on a two-dimensional similar test platform, comprising the following steps: inputting traction mechanics parameters into a vehicle dynamic load simulation mechanism so that the dynamic load applying device of the vehicle dynamic load simulation mechanism applies dynamic impact force and vibration load to the simulated road surface of the geological two-dimensional similar test platform; detecting the displacement parameters and stress parameters of the geological model of the geological two-dimensional similar test platform through multiple displacement monitoring modules and multiple stress monitoring modules of a data acquisition and analysis atlas recording device; determining the analysis results of ground stress and vehicle flow load based on the traction mechanics parameters, the displacement parameters and the stress parameters through the data integration and analysis module of the data acquisition and analysis atlas recording device.

[0015] The present invention also provides an electronic device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for applying dynamic load to a vehicle on a two-dimensional similar test platform as described above is implemented.

[0016] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the vehicle dynamic load application method of the two-dimensional similar test platform as described in any one of the above is implemented.

[0017] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method for applying dynamic load to a vehicle on a two-dimensional similar test platform as described above is implemented.

[0018] The two-dimensional similarity test platform vehicle dynamic load application device and method provided by the present invention can simulate actual geological conditions through a geological two-dimensional similarity test platform. The geological model and simulated road surface carried by the main structure of the test platform can simulate simulated road surfaces under different geological structures, so that the test results are closer to the actual situation; the vehicle dynamic load simulation mechanism can control the model vehicle to apply dynamic impact force and vibration load to the simulated road surface, and can simulate the driving condition of vehicle flow load on the actual road. The dynamic loading method helps to simulate the influence of vehicle load on the geological structure, so that the simulation is more in line with the actual situation; the data acquisition and analysis atlas recording device includes a plurality of displacement monitoring modules and stress monitoring modules pre-buried in the geological model, which can monitor and record the displacement and stress changes of the geological structure in the dynamic loading process in real time, and can determine the stress change and displacement change of the geological structure under the vehicle load, thereby solving the technical problem that the vehicle dynamic load application device in the related technology ignores the influence of dynamic load. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced one by one below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention.

[0021] Figure 2 It is a structural schematic diagram of a geological two-dimensional similarity test platform provided by the present invention.

[0022] Figure 3 It is a schematic diagram of the interaction between the geological two-dimensional similarity test platform and the data acquisition and analysis graph recording device provided by the present invention.

[0023] Figure 4 It is a structural schematic diagram of a geological two-dimensional similarity test platform and a vehicle dynamic load simulation mechanism provided by the present invention.

[0024] Figure 5 It is a schematic flow chart of a method for applying dynamic load to a vehicle on a two-dimensional similarity test platform provided by the present invention.

[0025] Figure 6 It is a schematic diagram of the physical structure of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Surface subsidence is a common geological phenomenon in the process of coal mining. Although its destructiveness is not as severe as that inside the mining area, it will also cause corresponding damage to various buildings (structures), roads (railways), industrial facilities, etc. on the surface, posing a threat to people's living and working environment. In many studies, exploring the interaction between goafs and roads has always been one of the focuses of scientific researchers. However, if we want to conduct in-depth research on the problem of coal mining under the highway, we cannot only consider the single effect of vehicle dynamic loads, but also need to comprehensively consider the impact of underground mining activities on the deformation and damage of highway structures. At present, the existing technologies close to this research plan mainly cover the following aspects: Traditional two-dimensional similar material model: This technology is based on the principle of similarity. By reducing the scale, a two-dimensional model is constructed using alternative materials (such as sand, gypsum, etc.) with similar physical and mechanical properties to the prototype material to simulate the pavement structure in real scenarios. This method can effectively reproduce the response characteristics of the pavement under static loads, but often ignores the impact of dynamic loads (such as vehicle driving).

[0028] Vehicle loading test device: This test is based on the traditional similar material model, with the addition of simulated vehicle loads. The vehicle weight is approximately simulated by applying a constant or slowly changing load on the model. Although this type of device can evaluate the bearing capacity of the pavement structure to a certain extent, its research focus is mainly on studying the mechanical response of the pavement structure under vehicle loads, and cannot combine the impact of underground mining.

[0029] Numerical simulation methods: With the development of computer technology, numerical simulation technologies such as finite element analysis (FEA) and discrete element method (DEM) are widely used in road structure analysis. Although these technologies can theoretically take into account the influence of complex dynamic loading conditions and underground mining activities, their accuracy and reliability are highly dependent on the precise establishment of the model and the reasonable selection of parameters, and the calculation cost is high, making it difficult to fully reflect the nonlinear behavior and uncertainty factors in actual engineering.

[0030] Although the above technologies can provide a certain basis for studying the interaction between roads and goafs, they still have the following significant disadvantages or shortcomings: (1) Lack of realistic simulation of dynamic loading: Traditional two-dimensional similar material models and static loading test devices are unable to effectively simulate the dynamic load effects generated during vehicle driving, such as impact force and vibration caused by acceleration and speed changes, which leads to insufficient understanding of the dynamic response characteristics of the road surface.

[0031] (2) It is difficult to comprehensively consider the coupling effects of multiple factors: In areas where underground mining activities are frequent, the stress-strain state of the road surface is not only affected by vehicle dynamic loads, but is also closely related to surface subsidence and ground stress changes caused by underground mining. Existing technologies often find it difficult to simulate these complex coupling effects simultaneously in one model, limiting the depth and breadth of research.

[0032] (3) High cost and limited flexibility: Although numerical simulation methods can theoretically handle complex problems, the high computational cost, complexity of model establishment, and reliance on professional knowledge limit their application in rapid iterative design and experimental verification.

[0033] In summary, the existing technology has obvious limitations in simulating the stress-strain state of the road surface under the combined action of vehicle dynamic load and underground mining activities, and there is an urgent need for a test platform and corresponding method that can comprehensively consider dynamic loading and multi-factor coupling and is cost-effective. The present invention aims to overcome the above shortcomings by designing a new two-dimensional similar test platform vehicle dynamic load application device and method, and provide a more accurate and efficient test method for research in related fields.

[0034] The present invention provides a model and test method for studying the stress-strain state changes of pavement under the combined effects of vehicle dynamic load and underground mining activities. By controlling the simulation quantity, the mathematical model or mechanical change law of the influence of vehicle dynamic load, underground mining and other possible variables on the highway structure is explored.

[0035] refer to Figure 1 , Figure 1 It is a structural schematic diagram of a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention.

[0036] According to the present invention, a two-dimensional similarity test platform vehicle dynamic load application device includes a geological two-dimensional similarity test platform 101, a vehicle dynamic load simulation mechanism 102 and a data acquisition and analysis atlas recording device 103; A geological two-dimensional similarity test platform 101 includes a test platform main structure 1011, a geological model 1012, and a simulated road surface 1013; The main structure 1011 of the test bench is used to carry the geological model 1011 and the simulated road surface 1013 inside, and the simulated road surface 1013 is located on the geological model 1012; The vehicle dynamic load simulation mechanism 102 includes a dynamic load applying device 1021. The vehicle dynamic load simulation mechanism 102 is connected to the test bench main structure 1011 and is located on the geological two-dimensional similarity test platform 101. The dynamic load applying device 1021 is used to control the model vehicle to apply dynamic impact force and vibration load to the simulated road surface to simulate vehicle flow load; The data acquisition and analysis graph recording device 103 includes multiple displacement monitoring modules 1031 and multiple stress monitoring modules 1032. The multiple displacement monitoring modules 1031 and multiple stress monitoring modules 1032 are pre-buried in the geological model 1012. The displacement monitoring modules 1031 are used to detect the displacement parameters of the geological model 1012, and the stress monitoring modules 1032 are used to detect the stress parameters of the geological model 1012.

[0037] In the embodiment of the present invention, the two-dimensional similarity test platform vehicle dynamic load application device is composed of three parts: a geological two-dimensional similarity test platform, a vehicle dynamic load simulation mechanism, and a data acquisition and analysis spectrum recording device. The modular design allows each part to work independently or be conveniently combined together, thereby improving the flexibility and scalability of the test.

[0038] The geological two-dimensional similarity test platform can simulate the soil and rock characteristics under different geological conditions through the combination of the test platform main structure, geological model and simulated road surface; the simulation helps researchers to have a deeper understanding of the impact of vehicle loads under different geological conditions.

[0039] The vehicle dynamic load simulation mechanism is closely connected to the main structure of the test bench to ensure that the dynamic load can be applied stably and accurately during the simulation process. It is located above the geological two-dimensional similarity test platform and directly acts on the simulated road surface to simulate the impact of vehicle flow load on the geological structure.

[0040] The dynamic load application device is used to apply dynamic impact force and vibration load to the simulated road surface according to the preset traction mechanical parameters. These parameters usually include load size, loading speed, loading frequency and loading direction, which together determine the characteristics and effects of the simulated vehicle load.

[0041] The dynamic load applying device may be implemented by a variety of technologies, such as hydraulic drive, electromagnetic drive or mechanical drive, etc. These technologies can ensure that the dynamic load applying device has sufficient accuracy and stability during the simulation process, so as to accurately reflect the impact of vehicle loads on geological structures.

[0042] By adjusting the traction mechanical parameters of the dynamic load applying device, the vehicle dynamic load simulation mechanism can simulate the dynamic impact force and vibration load on the road surface generated by vehicles of different types, speeds and weights when driving on actual roads.

[0043] In an embodiment of the present invention, during the construction phase of the vehicle dynamic load applying device of the two-dimensional similarity test platform, a plurality of displacement monitoring modules and a plurality of stress monitoring modules are pre-buried in predetermined layers of the geological model.

[0044] Through the embodiment of the present invention, the actual geological conditions can be simulated through the geological two-dimensional similarity test platform. The geological model and simulated road surface carried by the main structure of the test platform can simulate the simulated road surface under different geological structures, so that the test results are closer to the actual situation; the vehicle dynamic load simulation mechanism can control the model vehicle to apply dynamic impact force and vibration load to the simulated road surface, and can simulate the driving condition of vehicle flow load on the actual road. The dynamic loading method helps to simulate the influence of vehicle load on the geological structure, so that the simulation is more in line with the actual situation; the data acquisition and analysis atlas recording device includes a plurality of displacement monitoring modules and stress monitoring modules embedded in the geological model, which can monitor and record the displacement and stress changes of the geological structure in the dynamic loading process in real time, and can determine the stress change and displacement change of the geological structure under the action of the vehicle load.

[0045] According to the present invention, a two-dimensional similar test platform vehicle dynamic load application device and a geological model are provided, including: a road base, a loess layer, a first silt layer, a fine sand layer, a second silt layer, a mudstone layer, a coal seam, and a sandy mudstone layer.

[0046] refer to Figure 2 , Figure 2 It is a structural schematic diagram of a geological two-dimensional similarity test platform provided by the present invention.

[0047] In the embodiment of the present invention, Figure 2 As shown in the figure, the geological model, from top to bottom, is the road surface, roadbed, loess, siltstone (first siltstone layer), fine sandstone, siltstone (second siltstone layer), mudstone, coal seam, and sandy mudstone. The left part is the left guard plate, the right part is the right guard plate, and the bottom is the floor.

[0048] The road surface is a simulated road surface covering the roadbed of the geological model.

[0049] Road base: The base layer that simulates the road, usually has a certain strength and stability, and is used to support the pavement structure.

[0050] Loess layer: a typical soil layer with specific physical and mechanical properties, such as collapsibility and compressibility.

[0051] The first silt sand layer: a fine-grained sand layer with relatively good permeability and certain bearing capacity.

[0052] Fine sand layer: A sand layer with finer particles may have better permeability and lower bearing capacity.

[0053] Second silt layer: Similar to the first silt layer, but with different thickness or physical properties.

[0054] Mudstone: A rock formation composed primarily of clay minerals and generally characterized by low permeability and high compressibility.

[0055] Coal Seam: A formation of earth containing combustible coal with specific mechanical and physical properties, such as low strength and high compressibility.

[0056] Sandy mudstone: A mudstone layer containing sandy components, which may have better permeability and higher strength.

[0057] It should be noted that during the model construction process, the geological model will be adaptively adjusted according to the changes in the research object. For example, in the northwest region, there may be a large number of thick and abundant loess layers in the geological structure, while in the southwest region the loess layers may be relatively thin and scarce. The specific changes will be constructed in proportion according to the hydrogeological column diagram of the research object area.

[0058] Through the embodiments of the present invention, during the test, the vehicle dynamic load application device will apply dynamic loads to the roadbed according to the set parameters, and these loads will be transmitted to the loess layer, silt layer, fine sand layer, etc. below through the roadbed, and ultimately affect the entire geological structure. By observing and analyzing the deformation, damage, and other phenomena of these geological layers under load, we can gain a deep understanding of the impact mechanism of vehicle loads on geological structures.

[0059] According to a two-dimensional similarity test platform vehicle dynamic load application device provided by the present invention, the geological two-dimensional similarity test platform also includes: The underground modular mining simulation unit is located in the geological model. The underground modular mining simulation unit includes multiple single mining modules. The single mining modules are used to extract according to preset rules to simulate underground mining.

[0060] In an embodiment of the present invention, the underground modular mining simulation unit is used to simulate underground mining activities, construct a stress field and displacement field similar to underground mining at the bottom of the device, reproduce the effects of surface subsidence, ground stress changes, etc. caused by underground mining, and realize comprehensive consideration of the coupling of multiple factors.

[0061] The underground modular mining simulation unit contains multiple single mining modules, which can be extracted according to preset rules to simulate underground mining activities at different stages. The single mining module is the basic component of the underground modular mining simulation unit, simulating a single mining event in the underground mining process; the single mining module adopts a modular design, which is easy to assemble and disassemble, and can be flexibly configured according to test requirements; the single mining module can be extracted according to preset rules to simulate different stages and conditions in the underground mining process.

[0062] Through the embodiment of the present invention, the underground mining process is simulated in a modular manner, including multiple single mining modules, which can be extracted according to preset rules to simulate underground mining activities at different stages.

[0063] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the underground modular mining simulation unit is located in the coal seam, and the single mining module is a coal block.

[0064] In an embodiment of the present invention, the underground modular mining simulation unit is located in the coal seam of the above-mentioned geological model, and the single mining module is a movable coal block used to simulate the coal mining process under the ground.

[0065] For example, coal blocks are placed in the coal seam according to a certain pattern to form an underground modular mining simulation unit; according to the preset mining plan, coal blocks are gradually extracted to simulate the coal seam mining process; during the extraction process, the response of the coal seam and its surrounding geological structure is detected through multiple displacement monitoring modules and multiple stress monitoring modules pre-buried in the geological model.

[0066] Through the embodiments of the present invention, the underground modular mining simulation unit (located in the coal seam) uses coal blocks as single mining modules to achieve a true simulation of the coal seam mining process.

[0067] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the multiple displacement monitoring modules are respectively arranged on the surface of the geological model to detect the displacement parameters of the geological model, and the multiple stress detection modules are respectively pre-buried inside the geological model to detect the stress parameters of the geological model.

[0068] refer to Figure 3 , Figure 3 It is a schematic diagram of the interaction between the geological two-dimensional similarity test platform and the data acquisition and analysis graph recording device provided by the present invention.

[0069] like Figure 3 As shown, the data acquisition and analysis graph recording device includes a display, a control box, a displacement detection module 7 and a stress detection module 8, wherein a plurality of displacement monitoring modules are pre-buried in the loess layer, and a plurality of stress detection modules are pre-buried in the road base layer and the first silt sand layer.

[0070] Multiple displacement monitoring modules are pre-buried in the loess layer. As a typical soil layer, the loess layer has specific physical and mechanical properties, such as collapsibility and compressibility, and is therefore an important location for monitoring ground deformation.

[0071] The displacement monitoring module is used to monitor the displacement changes of the loess layer during mining activities. For example, various displacement sensors, such as laser rangefinders, displacement sensors, etc., may be used to evaluate the deformation of the stratum by measuring the distance change between the sensor and the target point.

[0072] Multiple stress detection modules are pre-buried in the roadbed and the first silt layer. These two geological layers are important components of roads and underground structures, and their stress states are used to assess the safety of mining activities.

[0073] The stress detection module is used to monitor stress changes in the roadbed and the first silt layer. For example, strain gauges, stress sensors and other equipment are used to measure the strain or stress in the geological layer to evaluate the impact of mining activities on the geological structure.

[0074] It should be noted that the displacement monitoring module is arranged on the surface of the geological model to detect the displacement parameters of the geological model, and the stress monitoring module is pre-buried inside the geological model (except for the roadbed, it will also be pre-buried in other layers according to needs) to detect the stress parameters of the geological model. The displacement monitoring units are evenly laid on the surface of the geological model in a grid-like manner (full coverage). Except for the stress monitoring unit that must be buried in the roadbed, the others will change according to changes in test requirements and the layers are not fixed.

[0075] Through the embodiments of the present invention, the key parameters of the model, such as stress, strain, displacement, etc., are monitored in real time through the displacement detection module and the stress detection module to ensure the accuracy and reliability of the data.

[0076] According to the present invention, a two-dimensional similar test platform vehicle dynamic load application device is provided, and the test platform main structure comprises: A bottom plate, a left guard plate and a right guard plate, wherein the left guard plate latch is connected to the left side of the bottom plate, and the right guard plate latch is connected to the right side of the bottom plate.

[0077] refer to Figure 2 ,like Figure 2 The main structure of the test bench includes a bottom plate, a left guard plate and a right guard plate. During the device construction phase, the tester installed latch-type baffles on both sides of the bottom plate and laid the bottom rock layer. Then, according to the comprehensive hydrogeological columnar diagram of the research object, it was laid in sequence as shown in (Attached Figure 2 It should be noted that when laying the mining layer (i.e. the coal seam), it is laid out according to standard modules in order to simulate the impact of mining (the coal seam is standardized piece by piece during the laying stage).

[0078] In an embodiment of the present invention, the base plate serves as the basic support part of the test bench, provides a stable support surface, and is usually made of high-strength, corrosion-resistant materials, such as steel plates or alloy materials, to ensure its load-bearing capacity and durability. The left guard plate and the right guard plate are connected to the base plate by a latch connection. The latch connection is a simple and effective connection method that allows the guard plate to be easily disassembled and installed when necessary, which facilitates the maintenance and adjustment of the test bench. At the same time, the left guard plate and the right guard plate also act as enclosures to ensure the closed nature of the test environment.

[0079] The latch connection is a connection method that connects two or more parts together through a latch. In the main structure of the test bench, the latch passes through the reserved holes on the guard plate and the bottom plate to connect the guard plate and the bottom plate.

[0080] In some embodiments, movable windows are reserved at corresponding positions of the left guard plate and the right guard plate at a preset layer (eg, coal seam) for extracting a single mining module.

[0081] Through the embodiment of the present invention, the main structure of the test bench forms a stable, strong and easy-to-maintain test platform through the combination of the bottom plate, the left guard plate and the right guard plate.

[0082] According to the present invention, a two-dimensional similar test platform vehicle dynamic load applying device is provided, the dynamic load applying device comprises: a screw-driven traction mechanism and at least one simulated vehicle; the vehicle dynamic load simulation mechanism further comprises: a plurality of connecting columns and a vehicle ring rail; One end of the plurality of connection columns is connected to the left guard plate and the right guard plate latch respectively, and the other end of the plurality of connection columns is fixed with a screw-driven traction mechanism, the vehicle ring track is covered on the simulated road surface, and the screw-driven traction mechanism is located at a target height above the vehicle ring track; The screw-driven traction mechanism is used to tow at least one simulated vehicle according to target traction mechanical parameters, so that the at least one simulated vehicle applies a target dynamic impact force and a target vibration load to the vehicle ring track to simulate the vehicle flow load.

[0083] refer to Figure 4 , Figure 4 It is a structural schematic diagram of a geological two-dimensional similarity test platform and a vehicle dynamic load simulation mechanism provided by the present invention.

[0084] like Figure 4 As shown, the dynamic load applying device of the vehicle dynamic load simulation mechanism includes a vehicle ring track 4, a screw-driven traction mechanism 5, a plurality of connecting columns and a simulated vehicle 6; wherein the screw-driven traction mechanism 5 is connected to the simulated vehicle 6 through a traction device, the simulated vehicle 6 travels on the vehicle ring track 4, the vehicle ring track 4 covers the ground (simulated road surface), one end of the plurality of connecting columns is respectively connected to the left guard plate and the right guard plate latch of the test bench main structure of the geological two-dimensional similar test platform, and the other end of the plurality of connecting columns is fixed with a screw-driven traction mechanism.

[0085] In the embodiment of the present invention, the connecting column plays a supporting and fixing role to ensure the stability and reliability of the entire dynamic load application device. One end of the connecting column is connected to the left guard plate and the right guard plate through a pin, and the other end is fixed with a screw-driven traction mechanism.

[0086] The screw-driven traction mechanism is located at a target height above the vehicle track to ensure accurate traction of the simulated vehicles; that is, at least one simulated vehicle is towed according to preset target traction mechanical parameters so that they can travel at a specific speed and acceleration. By towing the simulated vehicle, the target dynamic impact force and target vibration load are applied to the vehicle track, thereby simulating real vehicle flow loads.

[0087] The vehicle track is covered on the simulated road surface to provide a fixed driving path for the simulated vehicle, ensuring that the simulated vehicle can travel along the predetermined track while bearing the dynamic impact force and vibration load applied by the screw-driven traction mechanism.

[0088] Simulated vehicles are used to simulate the mass and dynamic characteristics of real vehicles to more accurately simulate vehicle flow loads.

[0089] According to the embodiment of the present invention, the dynamic load applying device drives the traction mechanism through the screw rod to traction at least one simulated vehicle, so that they travel on the vehicle ring track according to the target traction mechanical parameters. During the driving process, the simulated vehicle will apply dynamic impact force and vibration load to the vehicle ring track, thereby simulating the real vehicle flow load.

[0090] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the data acquisition and analysis graph recording device also includes: The data integration and analysis module is used to record the displacement parameters detected by the displacement monitoring module and the stress parameters detected by the stress monitoring module.

[0091] In the embodiment of the present invention, the data integration and analysis module can record the displacement parameters detected by the displacement monitoring module and the stress parameters obtained by the stress monitoring module. These data are collected in real time and stored in the internal database for subsequent analysis and mapping.

[0092] For example, the displacement monitoring module and the stress monitoring module are responsible for capturing displacement data and stress data respectively. These data are transmitted to the data integration and analysis module via wired or wireless means. All collected data are securely stored in the database of the data integration and analysis module to ensure data integrity and traceability.

[0093] According to the embodiment provided by the present invention, the data integration and analysis module stores the displacement data and stress data detected by the displacement monitoring module and the stress monitoring module, so as to facilitate subsequent data analysis.

[0094] According to a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention, the data integration and analysis module is also used to determine the analysis results of ground stress and vehicle flow load based on traction mechanics parameters, displacement parameters and stress parameters.

[0095] In an embodiment of the present invention, based on traction mechanics parameters (such as traction, acceleration, speed, etc.), displacement parameters (such as displacement amount, displacement rate, etc.) and stress parameters (such as stress value, stress distribution, etc.) combined with the knowledge of geology, mechanics and traffic engineering, the analysis results of ground stress and vehicle flow load are determined.

[0096] In order to facilitate user understanding and analysis, the data integration and analysis module can generate intuitive data maps and visual reports. For example, the maps and reports include displacement-time curves, stress distribution diagrams, relationship diagrams between ground stress and vehicle flow load, and related statistical analysis and prediction results.

[0097] The following describes an example of a two-dimensional similar test platform vehicle dynamic load application device provided by the present invention in practical application.

[0098] The vehicle dynamic load application device of the two-dimensional similarity test platform is composed of the geological two-dimensional similarity test platform (reference Figure 2 ), vehicle dynamic load simulation mechanism (reference Figure 4 ), data acquisition and analysis spectrum recording device (reference Figure 3 ), composed of three parts.

[0099] The geological two-dimensional similarity test platform is expected to be manually assembled by test personnel according to the changes in research content. It consists of the test platform main structure 1, underground modular mining simulation unit 2, and simulated road surface 3.

[0100] The vehicle dynamic load simulation mechanism is expected to consist of a vehicle ring track 4, a screw-driven traction mechanism 5 and a plurality of simulated vehicles 6.

[0101] The data acquisition and analysis spectrum recording device is envisioned to consist of a number of displacement monitoring modules 7, a number of stress monitoring modules 8 and a data integration and analysis system 9.

[0102] During the model construction phase, the experimenters installed latch-type baffles on both sides of the bottom plate and laid the bottom rock layer. Then, according to the comprehensive hydrogeological column diagram (i.e. geological model) of the research object, they laid the following Figure 2 As shown. It should be noted that when laying the mining layer (i.e., the coal seam), it is laid out according to the standard modules to simulate the impact of mining (i.e., the coal seam is standardized piece by piece during the laying stage). It should be noted that during the model construction stage, a number of displacement monitoring modules 7 and a number of stress monitoring modules 8 are pre-buried in the predetermined layer.

[0103] During the test phase, the underground mining process is simulated by regularly extracting the underground modular mining simulation unit 2 during the test, the vehicle operation process is simulated by the screw-driven traction mechanism 5, and the mechanical changes under the combined influence of underground mining and vehicle dynamic load are collected by the pre-buried monitoring modules 7 and 8. Through the control variable method, the mathematical model or mechanical change law of the influence of vehicle dynamic load on the road during underground mining is sought.

[0104] Dynamic loading device: The traction mechanism 5 is driven by a screw rod, and the traction-related mechanical parameters are solidified, which can simulate the driving state of vehicles under different masses, speeds, and accelerations. Dynamic impact force and vibration load are applied to the model, highly reproducing the dynamic effect of actual vehicle flow on the pavement structure.

[0105] Simulation of underground mining activities: The underground modular mining simulation unit 2 constructs a stress field and displacement field similar to underground mining at the bottom of the model, reproduces the effects of surface subsidence and ground stress changes caused by underground mining, and realizes comprehensive consideration of the coupling of multiple factors.

[0106] Proposal of vehicle flow-load flow conversion method: In order to more accurately simulate the impact of actual traffic flow on pavement structure, this study proposes an innovative vehicle flow-load flow conversion method. This method uses the control variable method, takes the existing measured data as a benchmark, and adjusts the vehicle model ratio to obtain the similarity ratio or mathematical model of ground stress and vehicle flow-load, providing a reference for the development of related experiments.

[0107] High-precision sensors are installed on the surface and inside of the model to monitor the model's key parameters such as stress, strain, and displacement in real time to ensure the accuracy and reliability of the data. Advanced signal processing technology is used to filter, amplify, and digitize sensor data to improve the efficiency and accuracy of data processing. Special data acquisition software is developed to receive, store, and analyze sensor data in real time, and generate intuitive charts and reports to facilitate researchers to quickly obtain and analyze test results.

[0108] This technical solution is not only applicable to the field of civil engineering, but can also be expanded to multiple fields such as mining engineering and transportation engineering, providing strong support for scientific research and technological innovation in related fields.

[0109] The following is a description of the method for applying dynamic load to a vehicle on a two-dimensional similar test platform provided by the present invention. The method for applying dynamic load to a vehicle on a two-dimensional similar test platform described below and the device for applying dynamic load to a vehicle on a two-dimensional similar test platform described above can be referred to in correspondence with each other.

[0110] refer to Figure 5 , Figure 5 It is a schematic flow chart of a method for applying dynamic load to a vehicle on a two-dimensional similarity test platform provided by the present invention.

[0111] Step 501, inputting traction mechanical parameters into a vehicle dynamic load simulation mechanism, so that a dynamic load applying device of the vehicle dynamic load simulation mechanism applies dynamic impact force and vibration load to a simulated road surface of a geological two-dimensional similarity test platform; Step 502, detecting displacement parameters and stress parameters of a geological model of a geological two-dimensional similarity test platform through a plurality of displacement monitoring modules and a plurality of stress monitoring modules of a data acquisition and analysis atlas recording device; Step 503, through the data integration and analysis module of the data acquisition and analysis atlas recording device, based on the traction mechanics parameters, displacement parameters and stress parameters, determine the analysis results of the ground stress and the vehicle flow load.

[0112] Specifically, the above-mentioned two-dimensional similar test platform vehicle dynamic load application method provided by the present invention can implement all the method steps implemented by the above-mentioned two-dimensional similar test platform vehicle dynamic load application device embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0113] Figure 6 is a schematic diagram of the physical structure of the electronic device provided by the present invention, such as Figure 6 As shown, the electronic device may include: a processor 610, a communication interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communication interface 620 and the memory 630 communicate with each other through the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute the vehicle dynamic load application method of the two-dimensional similar test platform, the method comprising: inputting the traction mechanics parameters into the vehicle dynamic load simulation mechanism, so that the dynamic load application device of the vehicle dynamic load simulation mechanism applies dynamic impact force and vibration load to the simulated road surface of the geological two-dimensional similar test platform; detecting the displacement parameters and stress parameters of the geological model of the geological two-dimensional similar test platform through multiple displacement monitoring modules and multiple stress monitoring modules of the data acquisition and analysis atlas recording device; determining the analysis results of ground stress and vehicle flow load based on the traction mechanics parameters, displacement parameters and stress parameters through the data integration and analysis module of the data acquisition and analysis atlas recording device.

[0114] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0115] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the two-dimensional similar test platform vehicle dynamic load application method provided by the above-mentioned methods, and the method includes: inputting traction mechanical parameters into a vehicle dynamic load simulation mechanism, so that the dynamic load application device of the vehicle dynamic load simulation mechanism applies dynamic impact force and vibration load to the simulated road surface of the geological two-dimensional similar test platform; detecting the displacement parameters and stress parameters of the geological model of the geological two-dimensional similar test platform through multiple displacement monitoring modules and multiple stress monitoring modules of the data acquisition and analysis atlas recording device; determining the analysis results of ground stress and vehicle flow load based on traction mechanical parameters, displacement parameters and stress parameters through the data integration and analysis module of the data acquisition and analysis atlas recording device.

[0116] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the two-dimensional similar test platform vehicle dynamic load application method provided by the above-mentioned methods, the method comprising: inputting traction mechanics parameters into a vehicle dynamic load simulation mechanism so that the dynamic load application device of the vehicle dynamic load simulation mechanism applies dynamic impact force and vibration load to the simulated road surface of the geological two-dimensional similar test platform; detecting the displacement parameters and stress parameters of the geological model of the geological two-dimensional similar test platform through multiple displacement monitoring modules and multiple stress monitoring modules of a data acquisition and analysis atlas recording device; determining the analysis results of ground stress and vehicle flow load based on traction mechanics parameters, displacement parameters and stress parameters through a data integration and analysis module of the data acquisition and analysis atlas recording device.

[0117] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0118] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0119] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0120] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0121] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-dimensional similarity test platform vehicle dynamic load application device, characterized in that: It includes a geological two-dimensional similarity test platform, a vehicle dynamic load simulation mechanism, and a data acquisition and analysis atlas recording device; The geological two-dimensional similarity test platform includes a test platform main structure, a geological model and a simulated road surface; The main structure of the test bench is used to carry the geological model and the simulated road surface inside, and the simulated road surface is located above the geological model; The vehicle dynamic load simulation mechanism comprises a dynamic load applying device, which is connected to the main structure of the test bench and is located on the geological two-dimensional similarity test platform. The dynamic load applying device is used to control the model vehicle to apply dynamic impact force and vibration load to the simulated road surface to simulate vehicle flow load; The data acquisition and analysis graph recording device includes multiple displacement monitoring modules and multiple stress monitoring modules. The multiple displacement monitoring modules and the multiple stress monitoring modules are pre-buried in the geological model. The displacement monitoring module is used to detect the displacement parameters of the geological model, and the stress monitoring module is used to detect the stress parameters of the geological model.

2. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 1, characterized in that: The geological model includes: a road base layer, a loess layer, a first silt layer, a fine sand layer, a second silt layer, a mudstone layer, a coal seam, and a sandy mudstone layer.

3. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 2, characterized in that: The geological two-dimensional similarity test platform also includes: An underground modular mining simulation unit is located in the geological model, and includes a plurality of single mining modules, and the single mining modules are used to extract according to preset rules to simulate underground mining.

4. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 3, characterized in that: The underground modular mining simulation unit is located in the coal seam, and the single mining module is a coal block.

5. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 2, characterized in that: The multiple displacement monitoring modules are respectively arranged on the surface of the geological model to detect the displacement parameters of the geological model, and the multiple stress detection modules are respectively pre-buried inside the geological model to detect the stress parameters of the geological model.

6. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 1, characterized in that: The main structure of the test bench includes: A bottom plate, a left guard plate and a right guard plate, wherein the left guard plate latch is connected to the left side of the bottom plate, and the right guard plate latch is connected to the right side of the bottom plate.

7. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 6, characterized in that: The dynamic load applying device comprises: a screw-driven traction mechanism and at least one simulated vehicle; the vehicle dynamic load simulation mechanism further comprises: a plurality of connecting columns and a vehicle ring rail; One end of the plurality of connection columns is connected to the left guard plate and the right guard plate latch respectively, the other end of the plurality of connection columns is fixed with the screw drive traction mechanism, the vehicle ring track covers the simulated road surface, and the screw drive traction mechanism is located at a target height above the vehicle ring track; The screw-driven traction mechanism is used to tow the at least one simulated vehicle according to target traction mechanical parameters, so that the at least one simulated vehicle applies a target dynamic impact force and a target vibration load to the vehicle ring track to simulate a vehicle flow load.

8. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 1, characterized in that: The data acquisition and analysis graph recording device also includes: The data integration and analysis module is used to record the displacement parameters detected by the displacement monitoring module and the stress parameters detected by the stress monitoring module.

9. The two-dimensional similarity test platform vehicle dynamic load application device according to claim 8, characterized in that: The data integration and analysis module is also used to determine the analysis results of ground stress and vehicle flow load based on the traction mechanics parameters, the displacement parameters and the stress parameters.

10. A method for applying dynamic load to a vehicle on a two-dimensional similarity test platform, characterized in that: include: Inputting the traction mechanics parameters into the vehicle dynamic load simulation mechanism, so that the dynamic load applying device of the vehicle dynamic load simulation mechanism applies dynamic impact force and vibration load to the simulated road surface of the geological two-dimensional similarity test platform; Detecting displacement parameters and stress parameters of the geological model of the geological two-dimensional similarity test platform through multiple displacement monitoring modules and multiple stress monitoring modules of the data acquisition and analysis spectrum recording device; The analysis results of ground stress and vehicle flow load are determined based on the traction mechanics parameters, the displacement parameters and the stress parameters through the data integration and analysis module of the data acquisition and analysis atlas recording device.

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