Wheel road dynamic coupling effect simulation test system and method

Abstract

The invention discloses a wheel-road dynamic coupling effect simulation test system and method. The wheel-road dynamic coupling effect simulation test system comprises a test box, a test piece bearing platform, a water level adjusting device, a temperature and humidity control device, a wheel assembly, a loading simulation device and a data acquisition module. The test piece bearing platform is arranged in the test box, and an accommodating cavity for accommodating a test piece is formed in the test piece bearing platform; the water level adjusting device is connected with the containing cavity and used for injecting liquid into or discharging liquid out of the containing cavity. The temperature and humidity control device is connected with the test box; the wheel assembly comprises a plurality of test wheels which are arranged in the test box and correspond to the accommodating cavities of the test piece bearing platform; the loading simulation device is arranged in the test box and is connected with the test wheel; the device can accurately simulate complex working conditions such as emergency braking in the take-off and landing process of an ultra-high-speed vehicle or an aircraft, multiple wheel-road interaction parameters are quantitatively measured, and an effective means is provided for evaluating the anti-sliding, anti-abrasion and anti-rutting performance of a road surface material.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of road engineering and material testing technology, in particular to a wheel-road dynamic coupling simulation test system and method. BACKGROUND

[0002] With the continuous increase of traffic flow and the continuous improvement of vehicle driving speed, the road surface faces more severe durability and safety challenges during long-term service. Traditional pavement detection methods mainly focus on macro-structure performance and static parameter measurement, and lack dynamic simulation and quantitative analysis means for the wheel-road interaction mechanism under high-speed driving conditions.

[0003] In the prior art, there are some wheel-road simulation devices for simulating the interaction between wheel and road. For example, the patent with publication number CN118025494A discloses an aircraft brake test device, which relates to the field of aircraft brake technology. The aircraft brake test device drives the driving roller to rotate by the driving mechanism, and the landing assembly and the torsion assembly are lowered by the lifting assembly, so that the wheel contacts the driving roller. At this time, the wheel starts to rotate from static state to simulate the state of the wheel starting to rotate from static state during the landing process of the aircraft. The landing assembly is rotated around the axis of the landing gear by the torsion assembly to simulate the state of the wheel and the airport ground when the aircraft skids. The shaft of the wheel is movably connected with the detection assembly, and the detection assembly can detect the stress condition of the shaft of the wheel. At this time, the brake system brakes the wheel, and the detection assembly can detect the stress condition of the shaft of the wheel when the wheel skids and brakes, so as to facilitate the subsequent analysis of the stress condition of the aircraft brake system in the aircraft skid state by the technician.

[0004] Although the above-mentioned existing test device can simulate the mechanical behavior under certain landing and skid conditions, its loading mode, speed range and environmental simulation capability are limited, and it cannot truly simulate the long-term coupling effect of key environmental factors such as temperature, humidity and water in complex environment, and it is difficult to fully reflect the wheel-road dynamic coupling mechanism. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provide a wheel-road dynamic coupling simulation test system and method, which solves the technical problems that the existing technology cannot truly simulate the long-term coupling effect of complex environmental factors and cannot fully reflect the wheel-road dynamic coupling mechanism.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme: In a first aspect, the present application provides a wheel-road dynamic coupling simulation test system, comprising a test box, a test piece bearing platform, a water level adjusting device, a temperature and humidity control device, a wheel assembly, a loading simulation device, and a data acquisition module; the test piece bearing platform is arranged in the test box and forms a containing cavity for containing a test piece; the water level adjusting device is in communication with the containing cavity and is used for injecting or discharging liquid into the containing cavity; the temperature and humidity control device is connected to the test box and is used for adjusting the temperature and humidity in the test box; the wheel assembly comprises a plurality of test wheels arranged in the test box and corresponding to the containing cavity of the test piece bearing platform; the loading simulation device is installed on the test box and connected to the test wheels, and is used for driving the test wheels to press against the surface of the test piece with a preset load, and driving each test wheel to rotate to generate circumferential movement of the test wheel on the surface of the test piece; the data acquisition module is arranged on the wheel assembly and / or the loading simulation device, and is used for acquiring dynamic coupling data between the test wheels and the test piece.

[0007] In some embodiments, the test piece bearing platform comprises a support, a sliding guide, and a test piece placing piece, the support is arranged in the interior of the test box, the sliding guide is arranged on the support, and the test piece placing piece is slidingly arranged on the sliding guide and has a working position located in the interior of the test box and a loading position located outside the test box.

[0008] In some embodiments, the water level adjusting device comprises a water inlet assembly and a water outlet assembly, both of which are installed on the support, the test piece placing piece is provided with a containing cavity for containing a test piece and a water inlet and a water outlet in communication with the containing cavity, and the water inlet assembly and the water outlet assembly are in communication with the water inlet and the water outlet, respectively.

[0009] In some embodiments, the water level adjusting device further comprises a water level sensor, which is installed in the containing cavity of the test piece placing piece.

[0010] In some embodiments, the temperature and humidity control device comprises a circulating air pipe and an air conditioning unit, the inlet of the circulating air pipe is arranged on one side of the test box and is in communication with the interior of the test box, and the air conditioning unit is installed on the side of the test box away from the inlet of the circulating air pipe, the air outlet end of the air conditioning unit is in communication with the interior of the test box, and the air inlet end is in communication with the circulating air pipe.

[0011] In some embodiments, the temperature and humidity control device further comprises a temperature sensor and a humidity sensor, both of which are installed in the interior of the test box.

[0012] In some embodiments, the loading simulation device comprises a bearing, a pressurizing component, a rotating driving component and an ABS braking module, two test wheels are provided, the bearing is arranged on the test box, the pressurizing component is arranged on the bearing and the output end thereof is connected with the test wheels for applying a set pressure to the test wheels, the rotating driving component is arranged on the bearing and connected with the two test wheels for driving the two test wheels to rotate in opposite directions, and the ABS braking module is arranged on the wheel shaft of the test wheel for braking control of the test wheel.

[0013] In some embodiments, the rotating driving component comprises a rotating driving member and a gear transmission member, the rotating driving member is arranged on the bearing, the gear transmission member comprises a driving gear and a plurality of driven gears, the output end of the rotating driving member is in transmission connection with the driving gear, the driving gear is in meshing transmission with each driven gear respectively, and each driven gear is in transmission connection with a corresponding test wheel respectively for transmitting the power of the rotating driving member to each test wheel to drive the test wheels to rotate in opposite directions.

[0014] In some embodiments, the data acquisition module comprises one or more of a force sensor, a rotation circle number sensor, a speed sensor and an acceleration sensor.

[0015] In a second aspect, the application further provides a wheel-road dynamic coupling simulation test method, comprising the wheel-road dynamic coupling simulation test system according to any one of the above aspects, and the method comprises the following steps: Placing the test piece on the test piece placing part of the test piece bearing platform and adjusting the test piece placing part to the working position; Starting the temperature and humidity control device, adjusting the temperature and humidity in the test box to the set value to simulate the temperature and humidity conditions in the actual use environment; Injecting a set amount of liquid into the containing cavity of the test piece placing part through the water level adjusting device to simulate the liquid contact condition in the actual use environment; Starting the loading simulation device, applying a set pressure to the test wheels by the pressurizing component, and driving each test wheel to rotate to generate circumferential movement of the test wheels on the test piece surface to simulate the dynamic coupling between the wheels and the test piece; During the test, the dynamic coupling data between the test wheels and the test piece are collected in real time by the data acquisition module and uploaded to the control system for real-time display and storage.

[0016] Compared with the prior art, the wheel-road dynamic coupling effect simulation test system and method provided by the application realizes accurate reproduction and collaborative control of temperature, humidity and liquid contact and other environmental factors through the integration of temperature and humidity control devices and water level adjusting devices, and can truly simulate the long-term service conditions of the wheel-road interface in actual complex environments. The design of the counter-rotating test wheel and the accurately controllable loading simulation device effectively restore the dynamic interaction mechanism of the wheel and the road surface under high-speed driving conditions, solving the key problem that the traditional method cannot quantitatively analyze the wheel-road coupling effect. Through the cooperation of the data acquisition module and the control system, real-time acquisition, display and storage of dynamic coupling data during the test process are realized, and the automation degree and data reliability of the test are significantly improved.

[0017] The system can accurately simulate the dynamic coupling process of the vehicle or aircraft wheel and the road surface under the super-high-speed driving condition, especially the wheel-road interaction behavior under the emergency braking condition; through synchronous acquisition and data processing of the data acquisition module, a plurality of key indicators such as braking force, braking distance, dynamic friction coefficient and slip rate can be quantitatively measured, providing data support for evaluating the safety performance of the road surface; in addition, the system also has complex environment simulation capability, and can reproduce different temperature, humidity and road surface water conditions, and is used for studying the influence of environmental factors on the material anti-skid, anti-wear and anti-rutting performance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is an exploded view of the wheel-road dynamic coupling effect simulation test system provided by the embodiment of the application; Figure 2 is a perspective structural schematic view of the wheel-road dynamic coupling effect simulation test system provided by the embodiment of the application; Figure 3 is a perspective structural schematic view of the wheel assembly and the loading simulation device installation of the wheel-road dynamic coupling effect simulation test system provided by the embodiment of the application; Figure 4 is a front view structural schematic view of the wheel assembly and the loading simulation device installation of the wheel-road dynamic coupling effect simulation test system provided by the embodiment of the application; Figure 5 is a perspective structural schematic view of the wheel assembly installation of the wheel-road dynamic coupling effect simulation test system provided by the embodiment of the application; Figure 6 is a front view structural schematic view of the wheel assembly installation of the wheel-road dynamic coupling effect simulation test system provided by the embodiment of the application; Figure 7 is a perspective structural schematic view of the test piece placing piece of the wheel-road dynamic coupling effect simulation test system provided by the embodiment of the application; Figure 8is a top view structural schematic diagram of the test piece after being placed in the wheel-road dynamic coupling simulation test system provided by the embodiment of the application.

[0019] Explanation of reference signs: 1, test box; 11, top plate; 12, bottom plate; 13, left side plate; 14, right side plate; 15, front side plate; 16, rear side plate; 17, door frame; 18, transparent observation door; 19, sensor mounting hole; 2, test piece bearing platform; 201, accommodating cavity; 21, support; 211, bolt positioning hole; 22, sliding guide rail; 23, test piece placing piece; 231, water inlet; 232, water outlet; 3, water level adjusting device; 31, water inlet assembly; 32, water outlet assembly; 4, temperature and humidity control device; 41, circulating air pipe; 42, air conditioning unit; 43, temperature sensor; 44, humidity sensor; 5, wheel assembly; 51, test wheel; 52, wheel shaft; 6, loading simulation device; 61, bearing piece; 62, pressurizing component; 621, hydraulic cylinder; 622, hydraulic actuating rod; 623, support plate; 63, rotary driving component; 631, rotary driving piece; 632, gear transmission piece; 633, transmission shaft; 64, ABS braking module; 7, data acquisition module; 8, general control switch; 9, test piece; 91, wheel trace. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0021] In order to solve the technical problems that the complex environmental factors cannot be truly simulated for long-term coupling effect and the wheel-road dynamic coupling mechanism cannot be comprehensively reflected, the present application provides a wheel-road dynamic coupling simulation test system and method, which can accurately simulate the complex working conditions such as emergency braking in the take-off and landing process of super-high-speed vehicles or aircrafts, quantitatively measure a plurality of wheel-road interaction parameters, and provide an effective means for evaluating the anti-skid, anti-wear and anti-rutting performance of road surface materials.

[0022] Please refer to Figures 1 to 8In a first aspect, the embodiments of the present application provide a wheel-road dynamic coupling simulation test system, which comprises a test box 1, a test piece bearing platform 2, a water level adjusting device 3, a temperature and humidity control device 4, a wheel assembly 5, a load simulation device 6, and a data acquisition module 7. The test piece bearing platform 2 is arranged in the test box 1 and forms an accommodating cavity 201 for accommodating a test piece. The water level adjusting device 3 is connected with the accommodating cavity 201 and used for injecting or discharging liquid into the accommodating cavity 201. The temperature and humidity control device 4 is connected with the test box 1 and used for adjusting the temperature and humidity in the test box 1. The wheel assembly 5 comprises a plurality of test wheels 51 arranged in the test box 1 and corresponding to the accommodating cavity 201 of the test piece bearing platform 2. The load simulation device 6 is installed on the test box 1 and connected with the test wheels 51, and used for driving the test wheels 51 to press against the surface of the test piece with a preset load and driving each test wheel 51 to rotate so as to generate circumferential movement of the test wheel on the surface of the test piece. The data acquisition module 7 is arranged on the wheel assembly 5 and / or the load simulation device 6 and used for acquiring dynamic coupling data between the test wheels 51 and the test piece.

[0023] In the present scheme, the test piece bearing platform 2 forms an accommodating cavity 201 for accommodating a test piece, and test pieces of different pavement materials can be placed in the accommodating cavity 201 to simulate the stress and dynamic coupling of different pavement materials in actual environments. The water level adjusting device 3 can accurately control the amount of liquid in the accommodating cavity 201, thereby simulating the influence of different environmental conditions such as rain and water accumulation on pavement materials. The temperature and humidity control device 4 can adjust the temperature and humidity in the test box 1, and can simulate the performance changes of pavement materials under different climate conditions, such as the influence of high-temperature dry environment or low-temperature humid environment on pavement materials. The test wheels 51 in the wheel assembly 5 correspond to the test piece on the test piece bearing platform 2, and the load simulation device 6 can control the load size, rotation direction and speed of the test wheels 51, thereby highly realistically simulating the dynamic coupling between the vehicle tire and the pavement. Finally, the data acquisition module 7 can acquire the dynamic coupling data between the test wheels 51 and the test piece in real time and accurately, thereby providing a reliable basis for subsequent research and analysis on the performance of pavement materials.

[0024] The test box 1 serves as the basic support structure of the entire simulation test system and provides a stable installation and operation environment for each component. It is made of high-strength and corrosion-resistant materials to ensure that it can withstand stress and corrosion under various complex environmental conditions during long-term use, thereby ensuring the reliability and stability of the test system. Please refer to Figure 1 and Figure 2, the test box 1 is a rectangular sealed structure, which is enclosed and sealed by a top plate 11, a bottom plate 12, a left side plate 13, a right side plate 14, a front side plate 15 and a rear side plate 16, a door frame 17 is arranged on the front side plate 15, and a transparent observation door 18 which can slide to one side is installed on the door frame 17, so as to facilitate observation and recording during the test. In order to facilitate the installation of sensors and other equipment, sensor mounting holes 19 are reserved on the left side plate 13 and the rear side plate 16, so that various sensors can be accurately installed.

[0025] Please refer to Figure 1 and Figure 2 In some possible embodiments, the test piece carrying platform 2 is composed of a support 21, a sliding guide rail 22 arranged on the support 21, and a test piece placing piece 23 slidingly arranged on the sliding guide rail 22. The support 21 adopts a rack structure, and the sliding guide rail 22 is arranged in parallel with two lengths perpendicular to the length direction of the front side plate 15, and is slidingly matched with the bottom of the two sides of the test piece placing piece 23. The test piece placing piece 23 can slide forward and backward on the sliding guide rail 22, and the sliding stroke has a working position and a loading position. When in the working position, the test piece placing piece 23 is located inside the test box 1 and directly below the test wheel 51 of the wheel assembly 5, so that the test piece placed in the accommodating cavity 201 accurately corresponds to the test wheel 51, so as to perform dynamic coupling simulation test. When in the loading position, the test piece placing piece 23 partially or entirely moves out of the test box 1, facilitating the test piece to be put into or taken out of the accommodating cavity 201.

[0026] Please refer to Figure 1 、 Figure 2 and Figure 7 In some possible embodiments, the test piece placing piece 23 is provided with a detachable fence which can adapt to test pieces of different sizes. The test piece placing piece 23 forms an accommodating cavity 201 at the top for fixing the pavement material test piece, and the side wall and the bottom are respectively provided with a water inlet 231 and a water outlet 232.

[0027] Further, in order to ensure the accurate positioning of the test piece placing piece 23 in the working position, the test piece placing piece 23 is further provided with a latch structure, and the support 21 is provided with a latch positioning hole 211. When the test piece placing piece 23 slides to the working position, the latch structure can be accurately inserted into the latch positioning hole 211 on the support 21, so as to realize the stable locking of the test piece placing piece 23.

[0028] Further, in some possible embodiments, an electric driving structure can also be arranged on the support 21, which can take the form of an electric push rod or a servo motor, and a transmission connection is established between the electric driving structure and the test piece placing piece 23. For example, one end of the electric push rod is fixed on the support 21, and the other end is connected with the test piece placing piece 23. The extension and retraction movement of the electric push rod is used to drive the test piece placing piece 23 to automatically slide on the sliding guide rail 22, so that the test piece placing piece 23 can be accurately switched between the working position and the loading position without manual operation, thereby improving the efficiency and convenience of the test.

[0029] Referring to Figure 1 and Figure 7 In some possible embodiments, the water level adjusting device 3 includes a water inlet assembly 31 and a water outlet assembly 32. The water inlet assembly 31 is a water inlet pipeline, the water inlet end of which is connected with an external water source, and the other end is arranged on one side of the top of the support 21. The water outlet assembly 32 is a water outlet pipeline, the water outlet end of which is installed on the top of the support 21. When the test piece placing piece 23 is in the working position, the water outlet 232 of the water inlet pipeline and the water inlet 231 of the water outlet pipeline correspond to the water inlet 231 and the water outlet 232 of the side wall of the test piece placing piece 23, respectively, so that the liquid can be injected into or discharged from the containing cavity 201. The water supply amount of the water inlet pipeline is accurately adjusted by the flow control valve arranged thereon or the water pump connected thereto, and the valve installed on the water outlet pipeline can control the discharge of the liquid in the containing cavity 201 by controlling the opening and closing of the valve.

[0030] When it is necessary to simulate a rainfall or water accumulation environment, the valve of the water outlet pipeline is in a closed state, and the flow control valve or the water pump on the water inlet pipeline is opened. The water flow is adjusted according to the preset test requirements, and the required amount of liquid is accurately injected into the containing cavity 201. When the test is completed or the environmental conditions need to be changed, the valve on the water outlet pipeline is opened, and the liquid in the containing cavity 201 is discharged. Through the cooperation of the water inlet assembly 31 and the water outlet assembly 32, the amount of liquid in the containing cavity 201 can be flexibly and accurately controlled, and various different actual environmental conditions can be simulated.

[0031] Further, in order to accurately simulate different simulated rainfall or water accumulation environments, in some possible embodiments, a water level sensor is installed inside the containing cavity 201 of the test piece placing piece 23. The water level sensor can be arranged on the side wall or the bottom of the containing cavity 201 by plug-in or clamping installation, and the detection end thereof is vertically arranged in the containing cavity 201, for real-time monitoring of the water level height in the containing cavity 201. The water level sensor, the flow control valve or the water pump, and the valve on the water outlet pipeline are connected through an electric circuit to form a feedback control system, so that the water level height in the containing cavity 201 can be controlled to always remain within a preset range, and the water immersion depth control is realized.

[0032] Of course, in other possible embodiments, the specific form of the water level adjusting device 3 is not limited to this, and other forms can also be used, for example, a liquid storage tank structure with a lifting function is used, the liquid storage tank is arranged outside the test box 1 and is connected in communication with the containing cavity 201 of the test piece placing piece 23 through a pipeline. A lifting platform is arranged in the liquid storage tank, and the lifting platform can move up and down in the liquid storage tank. When the lifting platform rises, the liquid in the liquid storage tank is squeezed to enter the containing cavity 201 through the pipeline, so as to realize injection of the liquid into the containing cavity 201. When the lifting platform descends, the liquid in the containing cavity 201 flows back to the liquid storage tank through the pipeline under the action of gravity, so as to realize discharge of the liquid in the containing cavity 201. At the same time, a scale mark can also be arranged on the liquid storage tank, so as to directly observe and control the amount of injected or discharged liquid, and a flow meter or other measuring device can be arranged on the pipeline, so as to further accurately control the flow of the liquid.

[0033] Please refer to Figure 1 In some possible embodiments, the temperature and humidity control device 4 includes a circulating air pipeline 41 and an air conditioning unit 42. The inlet of the circulating air pipeline 41 is arranged on the left side plate 13 of the test box 1 and is connected in communication with the inside of the test box 1. The air conditioning unit 42 is installed on the right side plate 14 of the test box 1, and the air outlet end thereof is connected in communication with the inside of the test box 1, and the air inlet end thereof is connected in communication with the circulating air pipeline 41. Therefore, the air conditioning unit 42 can extract the air in the test box 1 through the circulating air pipeline 41, and then send the air back into the test box 1 after adjusting the temperature and humidity, so as to realize uniform and stable control of the temperature and humidity in the test box 1. For example, when a high-temperature dry environment needs to be simulated, the air conditioning unit 42 can reduce the humidity and increase the temperature of the air sent into the test box 1. When a low-temperature humid environment needs to be simulated, the humidity of the air sent into the test box 1 can be increased, and the temperature of the air sent into the test box 1 can be reduced, so as to accurately simulate various climate conditions and provide a more reliable test environment for the performance test of the pavement material.

[0034] Further, in order to accurately control the temperature and humidity in the test box 1, in some possible embodiments, the temperature and humidity control device 4 further includes a temperature sensor 43 and a humidity sensor 44. The temperature sensor 43 and the humidity sensor 44 are both installed in the inside of the test box 1, and the detection ends of the temperature sensor 43 and the humidity sensor 44 are respectively used to monitor the temperature and humidity in the test box 1 in real time. The temperature sensor 43 and the humidity sensor 44 are connected in circuit with the air conditioning unit 42 to form a feedback control system. Based on the set temperature and humidity parameters, the air conditioning unit 42 automatically adjusts the temperature and humidity of the air sent into the test box 1 according to the signals fed back by the temperature sensor 43 and the humidity sensor 44, so as to ensure that the temperature and humidity in the test box 1 always remain within the preset range, thereby realizing more accurate temperature and humidity control and meeting the strict requirements of the performance test of the pavement material under different test conditions.

[0035] Of course, in other possible embodiments, the specific form of the temperature and humidity control device 4 is not limited to this, and other types of environment simulation equipment can also be used, such as a combination of an infrared heating device and a humidifier. The infrared heating device can be uniformly distributed on the top and side wall of the test box 1, and heat the air in the test box 1 by emitting infrared rays; the humidifier is an ultrasonic humidifier, which can atomize water into small particles and spray them into the test box 1, effectively increasing the air humidity.

[0036] Please refer to Figures 1 to 6 In some possible embodiments, the loading simulation device 6 includes a carrier 61, a pressurizing component 62, a rotary driving component 63, and an ABS braking module 64. Two test wheels 51 are provided. The carrier 61 is arranged on the test box 1, the pressurizing component 62 is arranged on the carrier 61 and the output end thereof is connected with the test wheel 51, for applying a set pressure to the test wheel 51; the rotary driving component 63 is arranged on the carrier 61 and is drivingly connected with the two test wheels 51, for driving the two test wheels 51 to rotate oppositely, which can generate a circumferential motion on the surface of the test piece; and the ABS braking module 64 is arranged on the wheel shaft 52 of the test wheel 51, for braking control of the test wheel 51. Through the design of the carrier 61, the pressurizing component 62, the rotary driving component 63, and the ABS braking module 64, the loading simulation device 6 can accurately simulate the stress condition and braking effect of the vehicle tire under different driving conditions. The pressurizing component 62 can flexibly adjust the pressure applied to the test wheel 51 according to the test requirement, so as to simulate the pressure effect of different load vehicles on the road surface material; the rotary driving component 63 can accurately control the rotation direction and speed of the test wheel 51, so as to simulate the dynamic coupling effect between the tire and the road surface under different working conditions such as vehicle acceleration, deceleration, and uniform speed driving; and the ABS braking module 64 enables the simulation test system to truly restore the complex mechanical relationship between the tire and the road surface during the braking process of the vehicle, thereby providing strong support for the research on the performance change of the road surface material under the braking condition.

[0037] In other possible embodiments, the test wheel 51 can also be more than two, in which case each test wheel 51 is circumferentially and uniformly distributed above the accommodating cavity 201 of the test piece bearing platform 2 and is drivingly connected with the rotary driving component 63. The rotary driving component 63 can adopt the form of a motor cooperating with a gear transmission set, and the power of the motor is uniformly distributed to each test wheel 51 through the gear transmission set, so as to ensure that each test wheel 51 can rotate synchronously and stably, thereby forming a regular and continuous circumferential motion track on the surface of the test piece.

[0038] In one of the specific embodiments, the bearing 61 adopts a rack body structure, which is fixedly installed between the support 21 and the top plate 11. The pressurizing component 62 is a hydraulic drive component, which comprises three hydraulic cylinders 621 and three hydraulic rotary drive components 63 respectively arranged on the hydraulic cylinders 621. The output ends of the three hydraulic cylinders 622 are connected with the support plates 623 below, and the support plates 623 and the rotary drive components 63 are connected to the wheel shaft 52 of the test wheel 51. According to the preset test requirements, different sizes of pressure can be accurately applied to the test wheel 51 to simulate the pressure effect of the tire on the road surface material when the vehicle with different loads runs.

[0039] In one of the specific embodiments, the rotary drive component 63 comprises a rotary drive 631 and a gear transmission 632. The rotary drive 631 is preferably a servo motor, which is installed at the bottom of the support plate 623. The gear transmission 632 comprises a gear box and a planetary gear arranged in the gear box. The planetary gear has a driving gear and a plurality of driven gears. The driving end of the servo motor is coaxially connected with the driving gear of the planetary gear in the gear box through a transmission shaft 633. The test wheel 51 is provided with two coaxial driven gears. When the servo motor is started, the driving end drives the driving gear to rotate, and the driving gear drives the two test wheels 51 to rotate at the same speed or at different speeds in opposite directions through the driven gears. The rotary drive component 63 can rotate relative to the support plate 623, so that the test wheel 51 can move circumferentially around the rotation mounting point of the rotary drive component 63 when rotating in opposite directions, and the continuous high-speed movement of the wheel can be simulated. By accurately controlling the rotation speed and direction of the servo motor, the tire rotation characteristics of the vehicle in different driving states, such as acceleration, deceleration, turning and the like, can be simulated, so that the dynamic coupling process between the vehicle tire and the road surface can be more truly reflected. The wheel shaft 52 of the test wheel 51 adopts a segmented structure, and the ABS brake module 64 is integrated at the wheel shaft 52, which has the function of anti-lock brake, can accurately brake the high-speed rotating test wheel 51, and can accurately simulate the dynamic coupling effect between the tire and the road surface of the vehicle under complex working conditions such as emergency braking or wet road surface.

[0040] In one of the specific embodiments, the test wheel 51 has a highest linear speed of 150 km / h, and the tire specifications of the test wheel 51 can be replaced, so that the automobile or aircraft tire can be simulated.

[0041] Of course, in other possible embodiments, the specific form of the loading simulation device 6 is not limited to this, and other types of driving and loading modes can also be used. For example, a combination of an electric cylinder and a chain transmission can be used, the electric cylinder is installed on the bearing 61, and the output end thereof is connected to the wheel shaft 52 of the test wheel 51 through a chain, and the chain transmission is driven by the extension and retraction movement of the electric cylinder, thereby realizing the loading and rotation control of the test wheel 51. In addition, the magneto-rheological fluid loading technology can also be considered, which utilizes the rheological properties of the magneto-rheological fluid under the action of a magnetic field, and changes the viscosity of the magneto-rheological fluid by controlling the magnetic field strength, thereby realizing the loading simulation of the test wheel 51.

[0042] In order to realize the collection of the dynamic coupling data between the test wheel 51 and the test piece, in some possible embodiments, the data acquisition module 7 includes a force sensor, a rotation circle number sensor, a speed sensor and an acceleration sensor, and is integrated on the wheel shaft 52, for collecting the dynamic coupling data such as the pressure, the rotation circle number, the rotation speed and the acceleration generated when the test wheel 51 contacts the test piece in real time.

[0043] In some possible embodiments, the system further includes a computer control program and a servo drive controller, for unified regulation and control of the environmental parameters, the wheel group rotation speed, the braking process and the data acquisition, and real-time processing and display of the sensor data.

[0044] In a second aspect, the embodiments of the present application also provide a wheel-road dynamic coupling simulation test method, which includes the wheel-road dynamic coupling simulation test system of any one of the above-mentioned embodiments, and the method includes the following steps: S1, placing the test piece on the test piece placing part 23 of the test piece bearing platform 2, and adjusting the test piece placing part 23 to the working position; S2, starting the temperature and humidity control device 4, and adjusting the temperature and humidity in the test box 1 to the set value, so as to simulate the temperature and humidity conditions in the actual use environment; S3, injecting a set amount of liquid into the containing cavity 201 of the test piece placing part 23 through the water level adjusting device 3, so as to simulate the liquid contact condition in the actual use environment; S4, starting the loading simulation device 6, so that the pressurizing part 62 applies a set pressure to the test wheel 51, and drives the respective test wheels 51 to rotate oppositely, so as to simulate the dynamic coupling between the wheel and the test piece; S5, in the test process, the dynamic coupling data between the test wheel 51 and the test piece are collected in real time through the data acquisition module 7, and are uploaded to the control system for real-time display and storage.

[0045] The present application also provides a more specific embodiment to illustrate the above-mentioned steps S1-S5, which includes the following steps: Step one, at the beginning of the test, slide the transparent observation door 18 open, pull the test piece placing part 23 out along the sliding guide rail 22 to the loading position, place the shaped test piece in the receiving cavity 201 of the test piece placing part 23, then push the test piece placing part 23 back to the working position and fix it through the latch structure, and finally close the transparent observation door 18.

[0046] Step two, start the system through the master control switch 8, set the required temperature, humidity and water level parameters in the control program. The system controls the temperature and humidity in the test chamber 1 according to the set values, feedback signals from the temperature sensor 43 and the humidity sensor 44 in real time, and adjusts the temperature and humidity in the test chamber 1 in cooperation with the circulating air pipe 41 and the air conditioning unit 42; at the same time, the water level adjusting device 3 injects liquid into the receiving cavity 201 according to the preset water level, and the drain assembly 32 is in the closed state.

[0047] Step three, after the environmental conditions in the test chamber 1 are stable, set the vertical load and the test speed in the control program. The pressurizing part 62 of the load simulation device 6 pushes the test wheel 51 to move downward, so that the test wheel 51 contacts the test piece surface at a set pressure. The rotary driving part 631 drives the two test wheels 51 to rotate at high speed through the transmission shaft 633 and the bevel gear structure in the gear box, so that the test wheel 51 forms a circular wheel trace 91 on the test piece around the preset path.

[0048] Step four, during the test, the force sensor, the rotation number sensor, the speed sensor and the acceleration sensor integrated on the wheel shaft 52 collect dynamic coupling data between the test wheel 51 and the test piece in real time, and upload them to the control system for real-time display and storage.

[0049] Step five, according to the test needs, the control system can be touched to issue a braking instruction, and the ABS braking module 64 is started immediately to simulate the anti-lock braking process of the actual vehicle during high-speed operation, and the sensors record the braking distance, dynamic friction coefficient, slip rate and deceleration parameters synchronously.

[0050] Step six, when the test conditions are changed, the control system directly adjusts the parameters such as temperature and humidity, water level, load and speed to simulate the dynamic coupling between the wheel and the road surface under different environmental and operating conditions.

[0051] Step seven, after all the tests are completed, the water inlet functions of the temperature and humidity control device 4 and the water level adjusting device 3 are closed in turn, the drain assembly 32 is opened to drain the liquid in the receiving cavity 201; then the test wheel 51 is lifted by the pressurizing part 62 to separate from the test piece surface, finally the power of the system is turned off, the transparent observation door 18 is opened, the test piece placing part 23 is moved out and the test piece is taken out, and the test is completed.

[0052] The wheel-road dynamic coupling simulation test system and method can accurately simulate the dynamic coupling process of vehicle or airplane wheels and the road under the super-high-speed driving condition, especially the wheel-road interaction behavior under the emergency braking condition; through the synchronous acquisition and data processing of the data acquisition module 7, the braking force, braking distance, dynamic friction coefficient and slip rate can be quantitatively determined, and the data support for evaluating the road safety performance is provided; in addition, the system also has the complex environment simulation capability, and can reproduce different temperature, humidity and road surface water conditions, and is used for studying the influence of environmental factors on the material skid resistance, wear resistance and anti-rutting performance.

[0053] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper" and "lower" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be interpreted broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0054] It should be noted that in the present application, relational terms such as "first" and "second" and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0055] The specific embodiments of the present application described above do not constitute a limitation on the scope of protection of the present application. Any various other corresponding changes and modifications made according to the technical concept of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A wheel-road dynamic coupling simulation test system, characterized in that, The test box comprises: a test box; a test piece bearing platform arranged in the test box and forming a containing cavity for containing a test piece; a water level adjusting device in communication with the containing cavity for injecting or discharging liquid into the containing cavity; a temperature and humidity control device connected to the test box for adjusting the temperature and humidity in the test box; a wheel assembly comprising a plurality of test wheels arranged in the test box and corresponding to the containing cavity of the test piece bearing platform; a load simulation device mounted on the test box and connected to the test wheels for driving the test wheels to press against the surface of the test piece with a preset load and driving the test wheels to rotate to generate circumferential movement on the surface of the test piece; and a data acquisition module arranged on the wheel assembly and / or the load simulation device for acquiring dynamic coupling data between the test wheels and the test piece. The test piece bearing platform comprises a support, a sliding guide and a test piece placing member, the support is arranged in the test box, the sliding guide is arranged on the support, and the test piece placing member is slidingly arranged on the sliding guide and has a working position inside the test box and a loading position outside the test box.

2. The wheel-dynamics-coupling simulation test system according to claim 1, wherein The water level adjusting device comprises a water inlet assembly and a water outlet assembly, both of which are mounted on the support, the test piece placing member is provided with a containing cavity for containing a test piece and a water inlet and a water outlet in communication with the containing cavity, and the water inlet assembly and the water outlet assembly are in communication with the water inlet and the water outlet, respectively.

3. The wheel-dynamics-coupling simulation test system according to claim 2, wherein The water level adjusting device further comprises a water level sensor mounted in the containing cavity of the test piece placing member.

4. The wheel-dynamics-coupling simulation test system according to claim 3, wherein The temperature and humidity control device comprises a circulating air pipe and an air conditioning unit, the inlet of the circulating air pipe is arranged on one side of the test box and in communication with the inside of the test box, and the air conditioning unit is mounted on the side of the test box away from the inlet of the circulating air pipe, with its air outlet end in communication with the inside of the test box and its air inlet end in communication with the circulating air pipe.

5. The wheel-dynamics-coupling simulation test system according to claim 1, wherein The temperature and humidity control device further comprises a temperature sensor and a humidity sensor, both of which are mounted in the inside of the test box.

6. The wheel-dynamics-coupling simulation test system according to claim 5, wherein The load simulation device comprises a bearing member, a pressure applying member, a rotation driving member and an ABS braking module, the test wheels are arranged in pairs, the bearing member is arranged on the test box, the pressure applying member is arranged on the bearing member and connected to the test wheels at its output end for applying a set pressure to the test wheels, the rotation driving member is arranged on the bearing member and connected to the test wheels for driving the test wheels to rotate in opposite directions, and the ABS braking module is arranged on the axle of the test wheel for braking control of the test wheel.

7. The wheel-dynamics-coupling simulation test system according to claim 1, wherein ​ 8. The wheel-dynamics-coupling simulation test system according to claim 7, wherein The rotating driving component comprises a rotating driving part and a gear transmission part, the rotating driving part is arranged on the bearing part, the gear transmission part comprises a driving gear and a plurality of driven gears, the output end of the rotating driving part is connected with the driving gear, the driving gear is in meshing transmission with each driven gear respectively, and each driven gear is in transmission connection with a corresponding test wheel respectively, for transmitting power of the rotating driving part to each test wheel to drive the test wheels to rotate oppositely.

9. The wheel-dynamics-coupling simulation test system according to claim 1, wherein The data acquisition module comprises one or more of a force sensor, a rotation circle number sensor, a speed sensor and an acceleration sensor.

10. A method of simulating a dynamic coupling effect of a wheel and a road, characterized by, The method comprises the wheel road dynamic coupling simulation test system according to any one of claims 1-9, and the method comprises: Placing the test piece on the test piece placing part of the test piece bearing platform, and adjusting the test piece placing part to the working position; Starting the temperature and humidity control device, adjusting the temperature and humidity in the test box to the set value to simulate the temperature and humidity conditions in the actual use environment; Injecting a set amount of liquid into the containing cavity of the test piece placing part through the water level adjusting device to simulate the liquid contact condition in the actual use environment; Starting the loading simulation device, applying a set pressure to the test wheels by the pressurizing part, and driving each test wheel to rotate to generate circumferential movement on the surface of the test piece to simulate the dynamic coupling between the test wheels and the test piece; During the test, the dynamic coupling data between the test wheels and the test piece are collected in real time by the data acquisition module and uploaded to the control system for real-time display and storage.

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