Three-way vibration table for mechanical dynamic behavior and performance test

Abstract

The utility model discloses a three-way vibration table for mechanical dynamic behavior and performance testing in the field of vibration testing, which comprises a mounting base, a vibration platform and a vibration unit used for driving the vibration platform to vibrate, and the mounting base is used for mounting the vibration platform and the vibration unit; comprising a locking device and a limiting device, each layer of platform in the vibration platform is locked through the locking device, and one-way vibration or two-way vibration is achieved; and the limiting device enables each layer of platform in the vibration platform to vibrate in a set range when being driven by the driving unit. The three-way vibration table provided by the utility model can realize a one-way or multi-way test experiment, realizes the vibration of the vibration platform within a set range through the limiting device during the vibration experiment, can accurately reproduce the dynamic behavior of a rotating machine under a complex working condition, and provides accurate support for the dynamic performance test.

Description

Technical Field

[0001] This utility model relates to the field of vibration testing, and in particular to a three-dimensional vibration table for testing mechanical dynamic behavior and performance. Background Technology

[0002] Vibration platforms are used to help researchers systematically analyze the response characteristics of machinery under complex operating conditions, thereby optimizing the design and control strategies of rotating machinery and enhancing the safety and reliability of production equipment. Rotating machinery is prone to insufficient structural strength, response delays, and inadequate safety protection under high power and complex operating conditions. Existing platforms struggle to simulate complex operating conditions, leading to increased operational risks and limited testing accuracy for rotating machinery. Utility Model Content

[0003] The purpose of this invention is to provide a three-dimensional vibration table for testing the dynamic behavior and performance of machinery, enabling unidirectional and multidirectional testing experiments. The limiting device ensures that the vibration is within a set range, thereby improving the testing accuracy.

[0004] To solve the above technical problems, the following technical solution is adopted:

[0005] This utility model provides a three-dimensional vibration table for testing the dynamic behavior and performance of machinery, including a mounting base, a vibration platform, and a vibration unit for driving the vibration platform to vibrate. The mounting base is used to mount the vibration platform and the vibration unit.

[0006] The vibration platform includes a first platform, a second platform, and a third platform, which are driven by the vibration unit to vibrate in the X, Y, and Z directions, respectively.

[0007] It also includes a locking device and a limiting device. The locking device locks each layer of the vibration platform to achieve unidirectional or bidirectional vibration. The limiting device ensures that each layer of the vibration platform vibrates within a set range when driven by the driving unit.

[0008] Optionally, the first-layer platform is mounted on the mounting base via an X-axis linear guide rail, the second-layer platform is mounted on the first-layer platform via a Y-axis linear guide rail, and the third-layer platform is mounted on the second-layer platform via a Z-axis linear guide rail.

[0009] Optionally, the vibration unit includes an X-axis excitation device, a Y-axis excitation device, and a Z-axis excitation device. The X-axis excitation device is installed on the first platform, the Y-axis excitation device is installed on the second platform, and the Z-axis excitation device is installed on the third platform.

[0010] Optionally, the X-axis excitation device, Y-axis excitation device, and Z-axis excitation device are all composed of electric cylinders and floating joints of the same specifications. Vibration loading modules are provided on the first, second, and third platforms, and the floating joints are connected to the vibration loading modules.

[0011] Optionally, both the first and second platforms are provided with mounting slots for installing the electric cylinder.

[0012] Optionally, the mounting base includes a mounting seat and a base plate, the base plate is disposed on the mounting seat, the mounting seat is provided with mounting guide rails for mounting the base plate, and the first layer platform is mounted on the base plate.

[0013] Optionally, the limiting device includes a first limiting block, a second limiting block, and a third limiting block. The first limiting block is disposed on both sides of the first layer platform in the X direction, the second limiting block is disposed on both sides of the second layer platform in the Y direction, and the third limiting block is disposed on the third layer platform.

[0014] The third limiting block includes two strip blocks. One end of one strip block is installed on the side of the third layer platform, and the other strip block is installed on the side of the second layer platform. The two strip blocks are arranged in parallel and connected by bolts, so that the third layer platform vibrates within a set range in the Z direction.

[0015] Optionally, the locking device includes a first locking member, a second locking member, and a third locking member. The first locking member is installed on the side of the first layer platform for locking the first layer platform in the X direction. The second locking member is installed on the second layer platform for locking the second layer platform in the Y direction. The third locking member is installed on the third layer platform for locking the third layer platform in the Z direction.

[0016] Optionally, it also includes a vibration sensor for monitoring the vibration of the vibration platform, a pressure pulse sensor for monitoring the pressure pulses of the vibration platform, a camera for recording the operating status of the vibration platform, and a swing sensor for detecting the swing of the vibration platform. The vibration sensor is mounted on the surface of the workpiece under test, the pressure pulse sensor is mounted on the third platform, the camera is mounted and supported at the height of the third platform via a gimbal, and the swing sensor is mounted and supported at the height of the third platform via a sensor bracket.

[0017] Optionally, the limiting device ensures that the vibration range of the vibration platform in the X, Y, and Z directions is 300 micrometers to 1 millimeter when the platform is vibrating, and the locking device ensures that the maximum vibration of the vibration platform in the X, Y, and Z directions when it is not vibrating is less than or equal to 30 micrometers.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0019] 1. The three-dimensional vibration table provided by this utility model can realize unidirectional or multidirectional testing experiments. During the vibration experiment, the vibration platform is made to vibrate within a set range by the limiting device. The three-dimensional vibration table realizes three-dimensional coupled vibration, which can accurately reproduce the dynamic behavior of rotating machinery under complex working conditions and provide accurate support for dynamic performance testing.

[0020] 2. The platforms of this utility model are connected by linear guide rails. The linear guide rails can not only serve as a connection and support, but also guide the corresponding platforms to move in the set direction, so as to avoid platform vibration and deflection, which would affect the final test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the vibration platform structure in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the planar structure of the vibration platform in an embodiment of this utility model;

[0024] Figure 4 This is a side view of the vibration platform in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the installation structure of the limiting device in an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the second-layer platform installation structure in an embodiment of this utility model;

[0027] Figure 7 This is a schematic diagram of the first layer structure in this utility model embodiment;

[0028] Figure 8 This is a schematic diagram of the first layer installation structure in this utility model embodiment;

[0029] Figure 9 This is a schematic diagram of the base plate mounting structure in an embodiment of this utility model;

[0030] Figure 10 This is a schematic diagram of the electric cylinder structure in an embodiment of this utility model;

[0031] Figure 11 This is a schematic diagram of the structure of the rotating platform for mounting the three-dimensional vibration table of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Mounting base; 101. Mounting guide rail; 2. Base plate; 3. Drive unit; 31. X-axis excitation device; 32. Y-axis excitation device; 33. Z-axis excitation device; 4. Vibration platform; 41. First-layer platform; 42. Second-layer platform; 43. Third-layer platform; 5. Electric cylinder; 51. Floating joint; 6. Locking device; 61. First locking element; 62. Second locking element; 63. Third locking element; 7. Limiting device; 71. First limiting block; 72. Second limiting block; 73. Third limiting block; 8. Vibration loading module; 9. X-axis linear guide rail; 10. Y-axis linear guide rail; 11. Z-axis linear guide rail; 12. Electric cylinder mounting slot; 13. Swing sensor; 14. Vibration sensor; 15. Gimbal; 16. Sensor bracket; 17. Pressure sensor mounting base; 18. Rotating platform. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0036] This embodiment provides a three-dimensional vibration table for testing mechanical dynamic behavior and performance, including a mounting base, a vibration platform 4, and a vibration unit. Both the vibration platform 4 and the vibration unit are mounted on the mounting base, and the vibration unit is used to drive the vibration platform 4 to vibrate.

[0037] like Figure 2 , Figure 3 As shown, the vibration platform 4 comprises three layers: a first-layer platform 41, a second-layer platform 42, and a third-layer platform 43. The three layers are installed sequentially, and the three layers vibrate in the X, Y, and Z directions respectively via the drive unit 3. Specifically, the first-layer platform 41 vibrates in the X direction, the second-layer platform 42 vibrates in the Y direction, and the third-layer platform 43 vibrates in the Z direction.

[0038] Each vibration platform 4 is equipped with a limiting device 7 and a locking device 6. By setting the limiting device 7, the vibration of each platform is controlled within a set range. By setting the locking device 6, each platform can be locked individually to realize unidirectional or two-way vibration experiments. For example, the first platform 41 can be locked, and the driving unit 3 can drive the second platform and the third platform 43 to vibrate in the Y and Z directions respectively. Alternatively, two platforms can be locked to realize unidirectional vibration experiments, meeting different experimental requirements.

[0039] The third-layer platform 43 has three layers and is used to install test specimens. A rotating platform can also be installed on it to perform vibration tests on the rotating platform and its components. The third-layer platform 43 has a large space and can support several sensors on the side to collect various parameter data during testing. Example 2

[0040] This embodiment is based on the three-axis vibration table for testing mechanical dynamic behavior and performance provided in Embodiment 1, with the following differences:

[0041] like Figure 4 , Figure 5 , Figure 7 , Figure 8 As shown, the mounting base includes a mounting seat 1 and a base plate 2. The mounting seat 1 is provided with a mounting guide rail 101. The four corners of the mounting seat 1 are mounted on the laboratory foundation by foot bolts and adjusting pads. The four corners of the base plate 2 are connected to the mounting seat 1 by bolts to the mounting guide rail 101.

[0042] The drive unit 3 includes an X-axis excitation device 31, a Y-axis excitation device 32, and a Z-axis excitation device 33. The X-axis excitation device 31, the Y-axis excitation device 32, and the Z-axis excitation device 33 are all composed of an electric cylinder 5 and a floating joint 51 of the same specifications. One end of the floating joint 51 is connected to the output end of the electric cylinder 5, and the other end has a connecting flange, which is connected to the platform.

[0043] Four X-axis linear guides 9 are evenly spaced on the upper surface of the base plate 2. The first-layer platform 41 is mounted on the base plate 2 via the four X-axis linear guides 9. An electric cylinder mounting slot 12 is provided in the middle of the first-layer platform 41. The electric cylinder mounting slot 12 is arranged in the X direction on the first-layer platform 41. An X-axis excitation device 31 and a vibration loading module 8 are provided inside the electric cylinder mounting slot 12. The floating joint 51 in the X-axis excitation device 31 is connected to the vibration loading module 8. One end of the vibration loading module 8 of the first layer is mounted on the base plate 2, and the other end extends into the electric cylinder mounting slot 12. When the electric cylinder 5 is driven, the vibration loading block vibrates in the X direction and transmits the vibration to the first-layer platform 41. First limiting blocks 71 are installed on both opposite sides of the first-layer platform 41. Each first limiting block 71 is a rectangular plate. Bolts pass through the first limiting blocks 71 and extend into the sidewalls of the first-layer platform 41, thus installing the first limiting blocks 71 on the first-layer platform 41. One end of each first limiting block 71 is mounted on the base plate 2, allowing the first-layer platform 41 to vibrate within the X-direction range of 300μm to 1mm, limiting the vibration range in the X-direction and improving the accuracy of vibration experimental parameters. A first locking member 61 is provided on the side of the first limiting block 71. The first locking member 61 includes a first base mounted on the sidewall of the first-layer platform 41, a first base mounted on the base plate 2, and a bolt assembly connecting the first base and the second base. Tightening the nuts on the bolt assembly locks the vibration of the first-layer platform 41 in the X-direction.

[0044] like Figure 5 , Figure 7 , Figure 8As shown, four Y-axis linear guides 10 are evenly arranged on the upper surface of the first-layer platform 41. The second-layer platform 42 is mounted on the first-layer platform 41 via the four Y-axis linear guides 10. An electric cylinder mounting slot 12 is provided in the middle of the second-layer platform 42. The electric cylinder mounting slot 12 is arranged in the Y direction on the second-layer platform 42. Inside the electric cylinder mounting slot 12 are a Y-axis excitation device 32 and a vibration loading module 8. The floating joint 51 in the Y-axis excitation device 32 is connected to the vibration loading module 8. One end of the loading module is mounted on the upper surface of the first-layer platform 41, and the other end extends into the electric cylinder mounting slot 12 of the second-layer platform 42 and connects to the floating joint 51. When the electric cylinder 5 is driven, the vibration loading module 8 vibrates in the Y direction and transmits the vibration to the second-layer platform 42. The second-level platform 42 has second limiting blocks 72 on both sides. The second limiting blocks 72 are rectangular plates. Bolts pass through both sides of the second limiting blocks 72 and extend into the side of the first-level platform 41. The top of the second limiting blocks 72 is connected to the bottom of the second-level platform 42, allowing the second-level platform 42 to vibrate in the Y direction between 300μm and 1mm, thus limiting the vibration range in the Y direction. The side of the second limiting blocks 72 has a second locking member 62. The second locking member 62 includes a folded plate and a bolt assembly mounted on the base plate 2. One end of the bolt passes through the folded plate and extends into the side of the second-level platform 42. By tightening the nut on the bolt assembly, the vibration of the second-level platform 42 in the Y direction is locked.

[0045] like Figure 3 , Figure 6 , Figure 10The Z-axis excitation device 33 on the third platform 43 is mounted on the side. The electric cylinder 5 in the Z-axis excitation device 33 is vertically mounted on the side wall of the mounting base 1. The floating joint 51 passes through the second platform 42, with one end connected to the bottom of the third platform 43 and the other end connected to the output end of the electric cylinder 5. The third platform 43 has three planes. The bottom two pairs of side edges have connecting plates extending downwards. The connecting plates are connected to the Z-axis linear guide rails 11 on the side of the second platform 42. There are four Z-axis linear guide rails 11, with two rails on each side of the second platform 42. The third platform 43 is connected to the side of the second platform 42 through the four Z-axis guide rails. The connecting plate has a third limiting block 73 on both sides. The third limiting block 73 includes a strip block on the connecting plate, a strip block installed on the side of the second platform 42, and a bolt assembly connecting the two strip blocks. The two strip blocks are arranged in parallel with staggered vertical spacing and are connected together by bolts, so that the third platform 43 vibrates in the Z direction between 300μm and 1mm. The third locking member 63 on the third platform 43 includes a base installed on the base plate 2, a bolt rod, and a nut. One end of the bolt rod is installed on the base, and the other end passes through the bottom layer of the first platform 41, the second platform 42, and the third platform 43. The end is fitted with a nut. After tightening the nut, the vibration of the third platform 43 in the Z direction is locked.

[0046] like Figure 1 , Figure 2 As shown, a pressure sensor mounting base 17 is provided at the bottom of the third-layer platform 43. A pressure pulse sensor is mounted on the pressure sensor mounting base 17 to measure the pressure pulses when the test piece vibrates on the third-layer platform 43. A vibration sensor 14 is also mounted on the test piece mounted on the vibration platform 4 to collect the vibration data of the test piece. The vibration sensor 14 is in direct contact with the vibration platform 4 and collects the vibration acceleration parameters of the vibration platform 4 in the vertical and horizontal directions to monitor the vibration status of the vibration platform 4. A swing sensor 13 is also provided on the side of the vibration platform 4, which is mounted and supported by a sensor bracket 16. The swing sensor 13 collects the swing data of the test piece. A black and white high-speed camera is also provided, which is mounted and supported by a pan-tilt unit 15 to record the vibration state of the test piece.

[0047] like Figure 3 , Figure 11As shown, the triaxial vibration platform 4 provided in this embodiment has sufficient space on the third-layer platform 43 to mount the rotating platform 18, allowing vibration testing of components on the rotating platform 18. When the rotating platform 18 is used as the test piece, the oscillation sensor 13 measures the oscillation data of the main shaft on the rotating platform 18, reflecting the oscillation status of the shaft center. The pressure pulse sensor collects the pressure pulse changes generated by the rotating platform 18 during both stopping and running. During the vibration process, the sensors collect vibration, oscillation, and other data of the test piece in real time. The data is transmitted to the control module via a data acquisition card. The control system analyzes and processes the data to generate a test report. The data acquisition card used is an NI PXIe-6363, and the control module used is an NI CompactRIO controller.

[0048] In use, the triaxial vibration platform 4 can perform triaxial, biaxial, or uniaxial experiments on the test piece. During triaxial testing, the locking devices 6 corresponding to each layer are released, and the excitation devices corresponding to each layer are activated. The test piece is then mounted on the third layer platform 43 for testing. During biaxial testing, the locking devices 6 of one layer are locked, and the corresponding excitation devices for that layer are not activated. After the excitation devices of the other two layers are activated, the maximum horizontal and vertical vibration of the locked layer is less than or equal to 30 μm. During uniaxial vibration testing, two layers are locked, and their corresponding excitation devices are not activated. The maximum horizontal and vertical vibration of the two locked layers is less than or equal to 30 μm, ensuring the stability and reliability of the platform in the non-excited state. Precise control of the X, Y, and Z-axis vibration displacement is achieved through the limiting devices 7 of each layer platform, ensuring the maximum horizontal and vertical vibration range of the platform during vibration. The clamping device is used when the drive unit 3 is not running to maintain the stability of the platform, limit the vibration to a very small range, and ensure the stability and accuracy of the vibration platform 4 during triaxial vibration. At the same time, the limit device 7 limits the maximum displacement range of the vibration table to prevent the vibration amplitude from exceeding the safe range, and ensures that the system remains stationary when the vibration source stops working, thus ensuring the accuracy of the experiment and the safety of the equipment.

[0049] The test specimen can be placed on the third platform 43 of the vibration platform 4 for testing. When the third platform 43 vibrates, it mainly bears the vibration in the Z direction, which is suitable for testing the vibration response characteristics of the test specimen in the vertical direction. When the first platform 41 vibrates, the vibration performance of the test specimen in the X direction can be tested. When the second platform 42 vibrates, the focus is on testing the vibration performance of the test specimen in the Y direction. In addition, when the test specimen is placed on the third platform 43, the three platforms vibrate simultaneously, which can bear the vibration in multiple directions at the same time, simulating more complex working conditions and comprehensively testing the performance of the test specimen in a multi-directional vibration environment.

[0050] The system utilizes a Bosch Rexroth EMC-115 electric cylinder (model 5) for precise control of the cylinder, enabling accurate regulation of vibration frequency and amplitude. It features real-time feedback and adaptive adjustment, ensuring the vibration table can accurately provide unidirectional or triaxial coupled vibration under different experimental requirements, while guaranteeing the stability and reliability of the vibration table during long-term operation. Precise control of current and stroke adjusts the impact force, ensuring stable and consistent impacts. The system's vibration frequency and amplitude are adjustable, providing both single-direction vibration and X, Y, Z-axis coupled vibration. Each platform is connected via linear guides, which serve as support and guide stable vibration in one direction for each platform.

[0051] The XYZ three-axis platform is used in the Vibration Platform 4 for Dynamic Behavior and Performance of Rotating Machinery to simulate vibration environments. The following describes its usage process in detail, covering preparation, operation, monitoring, and termination. Each step is closely linked to ensure the accuracy and safety of the test.

[0052] 1. Installation and Debugging Preparation Stage: Before using the three-dimensional vibration table, ensure the main body of the vibration table is properly installed. During installation, pay close attention to the selection and installation of the electric cylinder 5. Select an electric cylinder 5 such as the Bosch Rexroth EMC-115 according to design requirements, ensuring its thrust is not less than 2t and that parameters such as stroke and accuracy meet the requirements. After installing the electric cylinder 5, connect the floating joint 51 to connect it to the three-layer platform. At the same time, select a suitable guide rail, such as the HIWIN HGH25HA linear guide rail, ensuring it can withstand the total mass of the experimental table and that the guide rail length meets the displacement requirements. Install the limiting device 7 and the locking device 6, and adjust their positions to ensure that when the excitation device is in use, the horizontal and vertical vibrations of the vibration platform 4 are within the specified range (horizontal vibration ≥300μm and ≤1mm, maximum vertical vibration ≥300μm and ≤1mm); when the excitation device is not in use, the vibration between each layer of the platform is minimal (maximum horizontal vibration ≤30μm, maximum vertical vibration ≤30μm).

[0053] 2. Operation Phase: After preparation, the XYZ three-axis platform is started. The control system provides individual or synchronous power control for electric cylinder 5, and the X, Y, and Z-axis excitation device (electric cylinder 5) begins operation. Depending on the testing requirements, electric cylinder 5 provides vibrations of different frequencies and amplitudes, which can be vibrations in a single direction or coupled vibrations in the X, Y, and Z directions. For example, when simulating specific operating conditions of rotating machinery, precise control of electric cylinder 5 generates corresponding vibration frequencies and amplitudes to simulate the vibration state of the equipment during actual operation. During operation, the control system adjusts vibration parameters in real time to ensure that the output of excitation force, vibration amplitude, and frequency remains consistent with the set values, avoiding vibration errors.

[0054] 3. Monitoring Phase: While the platform is running, various sensors begin collecting data. Vibration sensor 14 is installed on the test bench body, collecting vibration acceleration data in both the vertical and horizontal directions. It converts vibration into electrical output through the piezoelectric effect, providing a basis for analyzing the test bench's vibration. Eddy current runout sensor is installed on the base of the rotating component of the test bench, near the rotating component. It uses the eddy current effect to collect shaft runout data, reflecting the swing of the shaft's centerline and helping to monitor the operating status of the rotating component. Pressure pulse sensor is installed on the base of the rotating component near the test bench's excitation source, collecting the impact generated during the test bench's start-up and shutdown, and the pressure pulse changes generated during operation, to promptly detect any abnormal pressure conditions that may affect equipment operation. The data collected by these sensors is transmitted to the control system in real time for monitoring and analyzing the testing process.

[0055] 4. Conclusion: After the test is completed, first stop all vibration devices, and electric cylinder 5 stops vibration output. Then, use locking device 6 to fix each layer of the platform to ensure that the platform is in a stable and static state, avoiding safety hazards or equipment damage caused by accidental vibration. Finally, organize and analyze the collected data to obtain the performance data of the test piece under simulated vibration environment, providing support for the research and optimization of rotating machinery.

[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A three-dimensional vibration table for testing the dynamic behavior and performance of machinery, characterized in that, It includes a mounting base, a vibration platform, and a vibration unit for driving the vibration platform to vibrate, wherein the mounting base is used to mount the vibration platform and the vibration unit; The vibration platform includes a first platform, a second platform, and a third platform, which are driven by the vibration unit to vibrate in the X, Y, and Z directions, respectively. It also includes a locking device and a limiting device. The locking device locks each layer of the vibration platform to achieve unidirectional or bidirectional vibration. The limiting device ensures that each layer of the vibration platform vibrates within a set range when driven by the driving unit.

2. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The first-layer platform is mounted on the mounting base via an X-axis linear guide rail, the second-layer platform is mounted on the first-layer platform via a Y-axis linear guide rail, and the third-layer platform is mounted on the second-layer platform via a Z-axis linear guide rail.

3. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The vibration unit includes an X-axis excitation device, a Y-axis excitation device, and a Z-axis excitation device. The X-axis excitation device is installed on the first platform, the Y-axis excitation device is installed on the second platform, and the Z-axis excitation device is installed on the third platform.

4. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 3, characterized in that, The X-axis excitation device, Y-axis excitation device, and Z-axis excitation device are all composed of electric cylinders and floating joints of the same specifications. Vibration loading modules are provided on the first, second, and third platforms, and the floating joints are connected to the vibration loading modules.

5. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 4, characterized in that, Both the first and second platform layers are provided with mounting slots for installing the electric cylinder.

6. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The mounting base includes a mounting seat and a base plate. The base plate is disposed on the mounting seat, and the mounting seat is provided with mounting guide rails for mounting the base plate. The first layer platform is mounted on the base plate.

7. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The limiting device includes a first limiting block, a second limiting block, and a third limiting block. The first limiting block is disposed on both sides of the first layer platform in the X direction, the second limiting block is disposed on both sides of the second layer platform in the Y direction, and the third limiting block is disposed on the third layer platform. The third limiting block includes two strip blocks. One end of one strip block is installed on the side of the third-layer platform, and the other strip block is installed on the side of the second-layer platform. The two strip blocks are arranged in parallel and connected by bolts, so that the third-layer platform vibrates within a set range in the Z direction.

8. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The locking device includes a first locking member, a second locking member, and a third locking member. The first locking member is installed on the side of the first layer platform and is used to lock the first layer platform in the X direction. The second locking member is installed on the second layer platform and is used to lock the second layer platform in the Y direction. The third locking member is installed on the third layer platform and is used to lock the third layer platform in the Z direction.

9. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, It also includes a vibration sensor for monitoring the vibration of the vibration platform, a pressure pulse sensor for monitoring the pressure pulse of the vibration platform, a camera for recording the operating status of the vibration platform, and a swing sensor for detecting the swing of the vibration platform. The vibration sensor is installed on the surface of the workpiece being measured, the pressure pulse sensor is installed on the third-layer platform, the camera is mounted and supported at the height of the third-layer platform via a gimbal, and the swing sensor is mounted and supported at the height of the third-layer platform via a sensor bracket.

10. The three-dimensional vibration table for testing mechanical dynamic behavior and performance according to claim 1, characterized in that, The limiting device ensures that the vibration range of the vibration platform in the X, Y, and Z directions is 300 micrometers to 1 millimeter when the platform is vibrating, and the locking device ensures that the maximum vibration of the vibration platform in the X, Y, and Z directions when it is not vibrating is less than or equal to 30 micrometers.

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