Dike traffic load simulation multi-degree-of-freedom device and test system

Abstract

The invention provides an embankment traffic load simulation multi-degree-of-freedom device and test system, and the device comprises an X-direction linear motion unit which employs a conveyor belt mechanical drive structure and is used for driving a Z-direction linear motion unit to move back and forth; the Y-direction linear motion unit adopts a linear motor electromagnetic driving structure and is used for driving the loading device to move left and right; the Z-direction linear motion unit adopts a linear motor electromagnetic driving structure and is used for driving the Y-direction linear motion unit to move up and down; the loading device is mounted at the top of the Y-direction linear motion unit and is used for outputting a dynamic load to simulate a stress test of the embankment roadbed under the action of a traffic dynamic load; and the motor control mainboard is in control connection with the X-direction linear motion unit, the Y-direction linear motion unit, the Z-direction linear motion unit and the loading device and is used for coordinating three-dimensional motion and dynamic loading control. Through cooperative control of spatial multi-degree-of-freedom motion and dynamic load, the technical bottleneck of dike traffic load simulation in a complex environment is solved.

Description

Technical Field

[0001] This invention relates to the field of geological disaster testing technology, and in particular to a multi-degree-of-freedom device and testing system for simulating traffic loads on dikes. Background Technology

[0002] In the field of geological engineering, with the widespread construction of embankments and subgrades in water conservancy projects, the impact of traffic loads on soil structures has become increasingly prominent. Especially under conditions of frequent heavy vehicle traffic, the subgrade is under complex stress for extended periods, making it highly susceptible to structural deformation, settlement, cracking, and even failure, severely affecting the stability and safety of the project. To deeply study the influence of traffic loads on the structural performance of embankments and subgrades, model testing has become an indispensable research tool. However, currently used embankment model test loading devices have limited functionality, primarily using vertical static loads, making it difficult to simulate the dynamic response of embankments under traffic dynamic loads and the multi-field coupling effects of complex climatic (rainfall infiltration) and hydrogeological (water level rise and fall) conditions. Furthermore, existing equipment often requires specialized design and manufacturing for embankments of different sizes and operating conditions, resulting in poor adaptability, high manufacturing costs, and low reusability, limiting its application in various testing scenarios. Summary of the Invention

[0003] To address the aforementioned issues, this invention aims to propose a multi-degree-of-freedom device and test system for simulating traffic loads on embankments. By coordinating the control of spatial multi-degree-of-freedom motion and dynamic loads, it solves the technical bottleneck of simulating traffic loads on embankments under complex environments, providing a highly adaptable experimental platform for geological disaster prevention and control.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A multi-degree-of-freedom device for simulating traffic loads on embankments includes: The X-axis linear motion unit uses a conveyor belt mechanical drive structure to drive the Z-axis linear motion unit to move back and forth. The Y-axis linear motion unit uses a linear motor electromagnetic drive structure to drive the loading device to move left and right. The Z-axis linear motion unit uses a linear motor electromagnetic drive structure to drive the Y-axis linear motion unit to move up and down. The loading device, installed on the top of the Y-axis linear motion unit, is used to output dynamic loads to simulate the stress test of the embankment subgrade under traffic dynamic loads. The motor control mainboard controls the X-axis linear motion unit, Y-axis linear motion unit, Z-axis linear motion unit, and loading device respectively, and is used to coordinate three-dimensional motion and dynamic loading control.

[0005] Furthermore, the X-axis linear motion unit includes a rotary motor, a driving wheel, a driven wheel, a conveyor belt, a slide rail, and a snap-on slide plate; the rotary motor drives the driving wheel to rotate, and the conveyor belt drives the driven wheel to form a closed-loop drive structure; the conveyor belt is fixedly connected to the snap-on slide plate by bolts, realizing the reciprocating motion of the snap-on slide plate along the slide rail in the X direction, providing basic lateral forward and backward movement function.

[0006] Furthermore, the snap-on end of the snap-on slide plate is slidably connected to the slide rail for support.

[0007] Furthermore, both the Y-axis linear motion unit and the Z-axis linear motion unit include a linear motor driver, a stator assembly, and a mover assembly; the Z-axis stator assembly is installed at the bottom of the snap-on slide plate, and the mover assembly is connected to the stator assembly of the Y-axis linear motion unit to form a linkage structure; the Y-axis mover assembly is installed on the upper part of the Z-axis mover assembly and is used to drive the support platform set on it to move smoothly left and right along the Y direction.

[0008] Furthermore, the loading device is installed on the bearing platform and includes a loading motor, a reversing gear, a reciprocating threaded rod, a push ring, a bushing, a loading rod, and a loading plate. The loading motor is connected to the reciprocating threaded rod via the reversing gear; the reciprocating threaded rod is connected to the loading rod via the push ring; the loading rod is fitted with the bushing to restrict its rotation and achieve reciprocating motion; and the loading rod is fixedly connected to the loading plate to apply dynamic loads to the external structure.

[0009] Furthermore, two sets of X-axis linear motion units are symmetrically arranged, and the lower part of the two sets of X-axis linear motion units is driven to connect to Z-axis linear motion units, and the two sets of Z-axis linear motion units are driven to connect to Y-axis linear motion units.

[0010] To achieve the above objectives, the present invention also provides a levee traffic load simulation test system, comprising the levee traffic load simulation multi-degree-of-freedom device as described above, and further comprising a physical model trough, a test slope, a control computer, a data acquisition instrument and stress sensors, and wires, wherein the top of the physical model trough is connected to the X-axis linear motion unit by bolts; the test slope is stacked in the physical model trough; the stress sensors are embedded inside the test slope and connected to the data acquisition instrument; the data acquisition instrument is connected to the control computer via wires and is used to collect stress response data inside the test slope during loading.

[0011] Furthermore, the stress sensors are in several groups, arranged in a three-dimensional array inside the test slope.

[0012] Furthermore, the X-axis linear motion unit is mounted on the top frame of the physical model slot, and the loading plate can cover the entire cross-section of the test slope for moving loading.

[0013] Beneficial effects: The invention offers flexible loading methods, supporting both static and dynamic loads, with controllable dynamic load frequency and waveform, realistically simulating the multi-directional characteristics of actual traffic loads; it also boasts excellent scalability, being compatible with multi-field coupling tests and meeting the needs of embankment traffic dynamic response tests in complex environments; and it reduces costs and improves efficiency, enabling a single device to complete various types of embankment or roadbed model tests by adjusting its posture in three-dimensional space, reducing the cost of repetitive equipment design and manufacturing, and improving the overall efficiency of the test system. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the multi-degree-of-freedom device for simulating traffic loads on embankments according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the X-axis linear motion unit of the multi-degree-of-freedom device for simulating traffic load on embankments according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the linear motor electromagnetic drive structure of the multi-degree-of-freedom device for simulating traffic load on embankments according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the loading device of the multi-degree-of-freedom device for simulating traffic load on embankments according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the embankment traffic load simulation test system according to an embodiment of the present invention. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] Example 1 See Figure 1-4 A multi-degree-of-freedom device for simulating traffic loads on embankments, comprising: X-axis linear motion unit 1 uses a conveyor belt mechanical drive structure to drive Z-axis linear motion unit 3 to move back and forth. Y-axis linear motion unit 2 uses a linear motor electromagnetic drive structure to drive the loading device 4 to move left and right. Z-axis linear motion unit 3 uses a linear motor electromagnetic drive structure to drive Y-axis linear motion unit 2 to move up and down. Loading device 4, installed on top of Y-direction linear motion unit 2, is used to output dynamic load to simulate the stress test of embankment subgrade under traffic dynamic load. The motor control main board 5 controls the X-axis linear motion unit 1, Y-axis linear motion unit 2, Z-axis linear motion unit 3 and loading device 4 respectively, and is used to coordinate three-dimensional motion and dynamic loading control.

[0018] This embodiment integrates X / Y / Z three-axis linkage and dynamic loading system, breaking through the limitations of traditional single static load mode and realizing three-dimensional spatial simulation of traffic dynamic load; the motor control motherboard realizes the coordinated control of multi-degree-of-freedom motion, improving the test accuracy.

[0019] In a specific example, the X-axis linear motion unit 1 includes a rotary motor 12, a driving wheel 13, a driven wheel 14, a conveyor belt 15, a slide rail 16, and a snap-on sliding plate 17. The rotary motor 12 drives the driving wheel 13 to rotate, and the conveyor belt 15 drives the driven wheel 14 to form a closed-loop drive structure. The conveyor belt 15 is fixedly connected to the snap-on sliding plate 17 by bolts 29, so as to realize the reciprocating motion of the snap-on sliding plate 17 along the slide rail 16 in the X direction, providing basic lateral forward and backward movement function. The snap-on end 170 of the snap-on sliding plate 17 is slidably connected to the slide rail 16.

[0020] In this embodiment, the conveyor belt structure, combined with the slide rail, enhances lateral movement stability. The design of the snap-on sliding plate, in conjunction with the slide rail, reduces mechanical wear, prevents excessive stress on the conveyor belt, improves load-bearing capacity, and extends equipment life.

[0021] In a specific example, both the Y-axis linear motion unit 2 and the Z-axis linear motion unit 3 include a linear motor driver 18, a stator assembly 19, and a mover assembly 20. The Z-axis stator assembly 19 is mounted on the bottom of the snap-on slide plate 17, and the mover assembly 20 is connected to the stator assembly 19 of the Y-axis linear motion unit 2 to form a linkage structure. The Y-axis mover assembly 20 is mounted on the upper part of the Z-axis mover assembly 20 and is used to drive the support platform 28 mounted thereon to move smoothly left and right in the Y direction.

[0022] In this embodiment, the Y / Z axis uses a rotary motor to achieve millisecond-level response; the three-dimensional linkage design ensures that the loading device can achieve high-precision controllable displacement in the X, Y, and Z directions.

[0023] In a specific example, the loading device 4 is installed on the bearing platform 28 and includes a loading motor 21, a reversing gear 22, a reciprocating threaded rod 23, a push ring 24, a bushing 25, a loading rod 26, and a loading plate 27. Specifically: the loading motor 21 is connected to the reciprocating threaded rod 23 via the reversing gear 22; the reciprocating threaded rod 23 is connected to the loading rod 26 via the push ring 24; the loading rod 26 is assembled with the bushing 25 to restrict its rotation and achieve reciprocating motion; and the loading rod 26 is fixedly connected to the loading plate 27 to apply dynamic loads to the external structure.

[0024] In this embodiment, the loading motor 21 drives the reciprocating threaded rod 23 to rotate through the reversing gear 22, and pushes the ring 24 to convert the rotational motion into the axial linear reciprocating motion of the loading rod 26. The loading rod 26 is assembled through the bushing 25 to prevent its rotation and achieve stable pushing. Finally, the dynamic load is applied to the surface of the test slope below through the loading plate 27 to simulate the frequency, amplitude and path of the real vehicle load.

[0025] In a specific example, two sets of X-axis linear motion units 1 are symmetrically arranged. The lower part of the two sets of X-axis linear motion units 1 is driven and connected to Z-axis linear motion units 3, and the two sets of Z-axis linear motion units 3 are driven and connected to Y-axis linear motion units 2.

[0026] The symmetrical layout of two sets of X-axis linear motion units improves the stability of Z-axis lifting and lowering, making it suitable for load tests on wide-span embankment models (such as 10m span).

[0027] Example 2 To achieve the above objectives, see Figure 5 This embodiment also provides a levee traffic load simulation test system, including the levee traffic load simulation multi-degree-of-freedom device as described above, and further including a physical model trough 6, a test slope 7, a control computer 8, a data acquisition instrument 9, a stress sensor 10, and a wire 11. The top of the physical model trough 6 is connected to the X-axis linear motion unit 1 by bolts 29; the test slope 7 is stacked in the physical model trough 6; the stress sensor 10 is embedded inside the test slope 7 and connected to the data acquisition instrument 9; the data acquisition instrument 9 is connected to the control computer 8 through the wire 11 and is used to collect stress response data inside the test slope 7 during the loading process.

[0028] This embodiment combines a multi-dimensional controllable motion platform with a dynamic loading device to construct a traffic load simulation system with high degree of freedom and strong adaptability. This system simulates the stress characteristics of embankment subgrade under traffic dynamic loads and multi-field coupling effects under complex stress, climate, and hydrogeological conditions. By collecting stress responses through the system, the influence of traffic loads on the structural performance of embankment subgrade can be studied in depth, providing an effective experimental platform for embankment safety evaluation.

[0029] In a specific example, the stress sensors 10 are in several groups, arranged in a three-dimensional array inside the test slope 7.

[0030] In this embodiment, several sets of stress sensors are arranged in a three-dimensional grid, which can collect data such as axial stress, shear stress, and pore water pressure.

[0031] In a specific example, the X-axis linear motion unit 1 is mounted on the top frame of the physical model slot 6, and the loading plate 407 can cover the entire cross-section of the test slope 7 for moving loading.

[0032] The X-axis top frame installation method in this embodiment allows the loading plate to cover any section of the slope, simulating the lane-changing conditions of heavy-load vehicles.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-degree-of-freedom device for simulating traffic loads on embankments, characterized in that, include: The X-axis linear motion unit (1) adopts a conveyor belt mechanical drive structure to drive the Z-axis linear motion unit (3) to move back and forth; The Y-axis linear motion unit (2) uses a linear motor electromagnetic drive structure to drive the loading device (4) to move left and right; The Z-axis linear motion unit (3) adopts a linear motor electromagnetic drive structure to drive the Y-axis linear motion unit (2) to move up and down; Loading device (4), installed on top of Y-direction linear motion unit (2), is used to output dynamic load to simulate the stress test of embankment roadbed under traffic dynamic load; The motor control motherboard (5) controls the X-axis linear motion unit (1), Y-axis linear motion unit (2), Z-axis linear motion unit (3) and loading device (4) respectively, and is used to coordinate three-dimensional motion and dynamic loading control.

2. The multi-degree-of-freedom device for simulating traffic loads on dikes according to claim 1, characterized in that, The X-direction linear motion unit (1) includes a rotary motor (12), a driving wheel (13), a driven wheel (14), a conveyor belt (15), a slide rail (16), and a snap-on slide plate (17). The rotary motor (12) drives the driving wheel (13) to rotate, and drives the driven wheel (14) through the conveyor belt (15) to form a closed-loop drive structure. The conveyor belt (15) is fixedly connected to the snap-on slide plate (17) by bolts (29), so as to realize the reciprocating motion of the snap-on slide plate (17) along the slide rail (16) in the X direction, and provide basic lateral forward and backward movement function.

3. The multi-degree-of-freedom device for simulating traffic loads on dikes according to claim 2, characterized in that, The snap-on end (170) of the snap-on slide plate (17) is slidably connected to the slide rail (16).

4. The multi-degree-of-freedom device for simulating traffic loads on dikes according to claim 2, characterized in that, The linear motion unit (2) in the Y direction and the linear motion unit (3) in the Z direction both include a linear motor driver (18), a stator assembly (19), and a mover assembly (20). The stator assembly (19) in the Z direction is installed at the bottom of the snap-on slide plate (17), and the mover assembly (20) is connected to the stator assembly (19) of the linear motion unit (2) in the Y direction to form a linkage structure. The mover assembly (20) in the Y direction is installed on the upper part of the mover assembly (20) in the Z direction and is used to drive the support platform (28) set on it to move smoothly left and right in the Y direction.

5. The multi-degree-of-freedom device for simulating traffic loads on dikes according to claim 4, characterized in that, The loading device (4) is installed on the bearing platform (28) and includes a loading motor (21), a reversing gear (22), a reciprocating threaded rod (23), a push ring (24), a bushing (25), a loading rod (26), and a loading plate (27). The loading motor (21) is connected to the reciprocating threaded rod (23) through the reversing gear (22); the reciprocating threaded rod (23) is connected to the loading rod (26) through the push ring (24); the loading rod (26) is assembled with the bushing (25) to restrict the rotation of the loading rod (26) and realize reciprocating motion; the loading rod (26) is fixedly connected with the loading plate (27) to realize the application of dynamic loads on the external structure.

6. The multi-degree-of-freedom device for simulating traffic loads on embankments according to claim 1, characterized in that, The X-direction linear motion unit (1) is symmetrically arranged in two sets. The lower part of the two sets of X-direction linear motion units (1) is driven and connected to the Z-direction linear motion unit (3), and the two sets of Z-direction linear motion units (3) are driven and connected to the Y-direction linear motion unit (2).

7. A levee traffic load simulation test system, comprising the levee traffic load simulation multi-degree-of-freedom device as described in any one of claims 1 to 6, characterized in that, It also includes a physical model trough (6), a test slope (7), a control computer (8), a data acquisition instrument (9), a stress sensor (10), and a wire (11). The top of the physical model trough (6) is connected to the X-axis linear motion unit (1) by bolts (29). The test slope (7) is stacked in the physical model trough (6). The stress sensor (10) is embedded inside the test slope (7) and connected to the data acquisition instrument (9). The data acquisition instrument (9) is connected to the control computer (8) through the wire (11) and is used to collect stress response data inside the test slope (7) during loading.

8. The embankment traffic load simulation test system according to claim 7, characterized in that, The stress sensors (10) are in several groups and arranged in a three-dimensional array inside the test slope (7).

9. The embankment traffic load simulation test system according to claim 7, characterized in that, The X-direction linear motion unit (1) is installed on the top frame of the physical model slot (6), and the loading plate (407) can cover the full-section moving loading of the test slope (7).

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