Suspension hydraulic heavy object vibration mode test platform

Abstract

The invention relates to a suspension hydraulic heavy object vibration mode test platform, which comprises a support base, a bearing seat is arranged above the support base, a translation base is arranged below the support base, the top surface of the support base is in spherical surface fit with the bearing seat, the bottom surface of the support base is in plane fit with the translation base, and an oil storage cavity is arranged in the support base. The oil storage cavity communicates with an oil inlet channel formed in the supporting base and further communicates with a plurality of first oil ways and second oil ways, and the oil outlet ends of the first oil ways communicate with the top face of the supporting base so that an oil film can be formed between the matching faces of the supporting base and the bearing base. And the oil outlet end of the second oil way is communicated to the bottom surface of the supporting base so as to form an oil film between the matching surfaces of the supporting base and the translation base. The test platform provided by the invention meets the vibration mode test requirement of a heavy object with relatively large weight.

Description

Technical Field

[0001] The invention relates to the technical field of vibration modal testing, and in particular to a suspended hydraulic heavy-load vibration modal testing platform. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the field of aerospace, vibration modal testing of large heavy loads is crucial for evaluating the dynamic characteristics of structures and ensuring their safety and reliability. Traditional dynamic tests generally use steel cables to "suspend" heavy loads to achieve free boundary simulation. The maximum load of this single-point suspension system is 150T, but as the weight of the structure increases, the bearing capacity of the vibration tower is high, there is a bearing limit, and free boundary conditions are more difficult to achieve. The traditional suspension system uses eight sets of free suspension devices to lift heavy loads to simulate free boundary conditions, which has great resistance. In addition, the installation and testing process of the traditional suspension system is complicated, the operation is difficult, and the efficiency is low. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a suspended hydraulic heavy-load vibration modal testing platform to meet the vibration modal testing requirements of heavy-load objects with a large bearing capacity.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] An embodiment of the present invention provides a suspended hydraulic heavy-load vibration modal testing platform, including a support base, a bearing seat is provided above the support base, and a translation base is provided below the support base, the top surface of the support base is matched with the spherical surface of the bearing seat, and the bottom surface of the support base is matched with the translation base in a plane, an oil storage chamber is provided in the support base, the oil storage chamber is connected with an oil inlet channel arranged on the support base, and the oil storage chamber is also connected with multiple first oil circuits and second oil circuits, the oil outlet end of the first oil circuit is connected to the top surface of the support base to form an oil film between the mating surfaces of the support base and the bearing base, and the oil outlet end of the second oil circuit is connected to the bottom surface of the support base to form an oil film between the mating surfaces of the support base and the translation base.

[0007] Optionally, a first sealing ring is provided between the outer edge of the top surface of the support base and the bearing seat, and a second sealing ring is provided between the bottom surface of the support base and the translation base.

[0008] Optionally, throttles are provided at the oil outlet ends of the first oil circuit and the second oil circuit.

[0009] Optionally, the throttle includes a throttle body, and a surface of the throttle body is provided with a spiral groove to form an oil channel.

[0010] Optionally, the oil storage chamber is connected to multiple oil outlet channels, the oil outlet channels are arranged along the radial direction of the support base, and the multiple oil outlet channels are arranged at equal intervals along the circumferential direction of the support base. A first oil circuit perpendicular to the oil outlet channel is provided above the oil outlet channel, the top center of the oil storage chamber is also connected to the first oil circuit, and a second oil circuit perpendicular to the oil outlet channel is provided below the oil outlet channel.

[0011] Optionally, the oil outlet end of the first oil circuit is communicated with a first groove provided on the top surface of the support base, and the oil outlet end of the second oil circuit is communicated with a second groove provided on the bottom surface of the support base.

[0012] Optionally, a first observation flow channel and a second observation flow channel are further provided in the support base, the inlets of the first observation flow channel and the second observation flow channel extend to the top surface of the support base, and pressure detection elements are provided at the outlets of the first observation flow channel and the second observation flow channel.

[0013] Optionally, an oil return channel is also provided in the support base, and the oil return channel includes a first channel portion, one end of the first channel portion extends to the top surface of the support base, and the other end extends to the bottom surface of the support base, the first channel portion is connected to one end of the second channel portion, and the other end of the second channel portion extends to the peripheral surface of the support base to form an oil return port, and the oil return port is used to connect to the oil tank through an oil pipe.

[0014] Optionally, a boss is provided on the top edge of the support base, and a limit stop is provided on the upper surface of the boss to limit the movement of the bearing seat.

[0015] Optionally, an oil retaining ring is provided on the outer edge of the upper surface of the translational base.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. In the heavy-load vibration modal test platform of the present invention, the support base and the bearing seat are matched by a spherical surface, and the support base and the translational base are matched by a plane. The bearing seat is used to bear the heavy load. Through the arrangement of the oil storage chamber, the first oil circuit and the second oil circuit, an oil film can be formed between the matching surfaces of the support base and the bearing seat, and an oil film can be formed between the matching surfaces of the support base and the translational base. The relative motion friction torque generated between the support base, the translational base and the bearing seat is small, which meets the simulation of the free boundary of the heavy load, and the oil film has extremely high stiffness, and the pressure is evenly distributed on the entire oil film. Therefore, the support base will not bear a large local pressure. Compared with the traditional suspension method to pull up the heavy load to achieve free boundary simulation, it meets the vibration modal test requirements of heavy loads with heavy weight. During the test, it only needs to fix the heavy load on the bearing seat. Compared with the suspension method, the operation difficulty is smaller, and the test efficiency is improved.

[0018] 2. In the heavy-load vibration modal test platform of the present invention, throttles are provided at the oil outlet ends of the first oil circuit and the second oil circuit. The throttles use spiral grooves to achieve throttling. Compared with traditional small-hole throttles, the working process is smoother. There is no sense of obstruction when relative movement occurs between the support base and the bearing seat and the translation base. The oil outlet of the spiral groove is not perpendicular to the spherical joint surface between the support base and the bearing seat, and will not damage the spherical joint surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0021] Figure 2 is a top view of a support base according to Embodiment 1 of the present invention;

[0022] Figure 3 is a bottom view of a support base according to Embodiment 1 of the present invention;

[0023] Figure 4 The present invention Figure 2 A-direction cross-sectional diagram;

[0024] Figure 5 The present invention Figure 2 Schematic diagram of the cross section in the direction of B;

[0025] Figure 6 The present invention Figure 2 Schematic diagram of the C-direction cross section;

[0026] Figure 7 The present invention Figure 2 D-direction cross-sectional diagram;

[0027] Figure 8 This is a schematic diagram of the structure of the throttle in Example 1 of the present invention;

[0028] Fig. 9 The present invention Figure 8 A-direction cross-sectional diagram;

[0029] Fig.10 is a top view of the bearing seat of embodiment 1 of the present invention;

[0030] Fig.11 The present invention Fig.10 A-direction cross-sectional diagram;

[0031] Fig.12 1 is a top view of the limit stop platform of embodiment 1 of the present invention;

[0032] Fig.13 The present invention Fig.12 A-direction cross-sectional diagram;

[0033] Fig.14 1 is a top view of the oil deflector ring of Embodiment 1 of the present invention;

[0034] Fig.15 The present invention Fig.14 A-direction cross-sectional diagram;

[0035] Fig.16 is a top view of the translation base of embodiment 1 of the present invention;

[0036] Fig.17 1 is a bottom view of the translation base of embodiment 1 of the present invention;

[0037] Fig.18 The present invention Fig.16 A-direction cross-sectional diagram;

[0038] Fig.19 The present invention Fig.16 Schematic diagram of the cross section in the direction of B;

[0039] Among them, 1. bearing seat, 2. first sealing ring, 3. limit stop, 4. hexagon socket screw plug, 5. sealing gasket, 6. plug, 7. support base, 8. anti-collision ring, 9. oil retaining ring, 10. oil outlet pipe joint, 11. translation base, 12. rectangular sealing ring, 13. flat O-ring, 14. throttle, 15. throttle, 16. oil storage chamber, 17. oil inlet channel, 18. first oil circuit, 19. second oil circuit, 20. oil outlet channel, 21. first groove, 22. second groove, 23. second flow channel part, 24. first observation flow channel, 25. second observation flow channel, 26. spiral groove, 27. limit protrusion, 28. first flow channel part. DETAILED DESCRIPTION

[0040] Example 1

[0041] This embodiment provides a suspended hydraulic heavy load vibration modal test platform, such as Figure 1As shown, it includes a support base 7, a bearing seat 1 is provided above the support base 7, and the bearing seat 1 is used to support the heavy load to be tested, a spherical fit is adopted between the support base 7 and the bearing seat 1, and a translation base 11 is provided below the support base 7, and a plane fit is adopted between the support base 7 and the translation base 11. In this embodiment, a spherical plus plane fit method is adopted to meet the requirements of the free boundary condition of the heavy load, and a first sealing ring 2 is provided between the outer edge of the top surface of the support base 7 and the bearing seat 1, which is used to seal the gap between the top surface of the support base and the bearing seat to prevent oil leakage. Preferably, the first sealing ring 2 adopts a rectangular sealing ring, and a second sealing ring is provided between the outer edge of the bottom surface of the support base 7 and the top surface of the translation base 11, which is used to seal the gap between the bottom surface of the support base and the translation base to prevent oil leakage. Preferably, two second sealing rings are provided, and the second sealing ring located on the outside is a rectangular sealing ring 12, and the second sealing ring on the inside is a plane O-ring 13.

[0042] like Figure 2-Figure 7 As shown, an oil storage chamber 16 is provided at the center position of the support base 7, and the oil storage chamber 16 is coaxially arranged with the support base 7. The oil storage chamber 16 is connected with an oil inlet channel 17 opened on the support base 7. The oil inlet channel 17 is arranged along the radial direction of the support base 7. The oil inlet end of the oil inlet channel 17 extends to the circumferential surface of the support base 1 and is provided with an oil inlet pipe joint. The oil inlet channel 17 can be connected to the oil supply system through the oil inlet pipe joint.

[0043] In this embodiment, in order to facilitate the processing of the oil storage chamber, when processing the oil storage chamber 16, a hole is drilled at the center of the bottom surface of the support base 7 to form an oil storage chamber, and then the hexagonal screw plug 4 is threadedly connected at the drilled hole for sealing. The space above the hexagonal screw plug 4 forms the oil storage chamber 16. In order to avoid leakage of oil, a sealing gasket 5 is provided between the hexagonal screw plug 4 and the bottom surface of the support base.

[0044] The oil storage chamber 16 is connected to the oil inlet ends of multiple first oil circuits 18 and second oil circuits 19. The oil outlet end of the first oil circuit 18 extends to the top surface of the support base 7, which is used to form an oil film between the spherical mating surfaces of the support base 7 and the bearing seat 1. The oil outlet end of the second oil circuit 19 extends to the bottom surface of the support base 7, which is used to form an oil film between the support base 7 and the planar mating surface of the translational base 11.

[0045] Specific:

[0046] The side of the oil storage cavity 16 is connected to one end of a plurality of oil outlet channels 20 , which are arranged along the radial direction of the support base 7 , and the other end of the oil outlet channel 20 extends to the circumference of the support base 7 and is threadedly connected with a plug 6 for sealing.

[0047] In order to ensure uniform distribution of the oil, the plurality of oil outlet channels 20 are distributed at equal intervals along the circumferential direction of the support base 7 .

[0048] In this embodiment, six oil outlet channels 20 are provided. It can be understood that those skilled in the art can set the number of oil outlet channels according to actual needs.

[0049] The upper portion of each oil inlet channel 20 is connected to the bottom end of the corresponding first oil path 18 . The first oil path 18 is vertically arranged to the oil outlet channel 20 . The top end of the first oil path 18 extends to the top surface of the support base 7 .

[0050] The top center position of the oil storage chamber 16 is also connected to the bottom end of a first oil passage 18 , and the top end of the first oil passage extends to the top surface of the support base 7 .

[0051] A throttle 14 is provided at the top liquid outlet end of the first oil passage 18 connected to the oil outlet channel 20 .

[0052] The lower portion of each oil outlet channel 20 is connected to the top end of the corresponding second oil circuit 19 . The second oil circuit 19 is coaxially arranged with the first oil circuit 18 connected to the oil outlet channel 20 . The second oil circuit 19 is perpendicular to the oil outlet channel 20 . The bottom end of the second oil circuit 19 extends to the bottom surface of the support base 7 .

[0053] A throttle 15 is provided at the bottom liquid outlet of each second oil passage 19 .

[0054] In this embodiment, Figure 8-Figure 9 As shown, the throttle includes a throttle body, which matches the first oil circuit 18 and the second oil circuit 19 and can be installed at the liquid outlet ends of the first oil circuit 18 and the second oil circuit 19. The outer peripheral surface of the throttle body is provided with a spiral groove 26, which serves as a circulation channel for the oil and plays a throttling role.

[0055] The throttle of this embodiment has a smoother working process compared to the traditional small hole throttle. There is no sense of obstruction when relative movement occurs between the support base 7 and the bearing seat 1 and the translation base 11. The oil outlet of the spiral groove 26 is not perpendicular to the spherical joint surface between the support base and the bearing seat, and will not damage the spherical joint surface.

[0056] In this embodiment, the reason why the high-pressure oil is delivered to the supporting base 7, between the mating surfaces of the bearing seat 1, and between the mating surfaces of the supporting base 7 and the translation base 11 by using a pipeline plus a throttle is not to simply let the high-pressure oil slowly penetrate into the contacting places from the oil circuit, because the weight of the object being carried is very large, and the method of slowly seeping is, firstly, relatively inefficient, and secondly, it is very likely that it cannot penetrate completely, and at the end, it is very likely that the gravity of the object prevents it from penetrating. The first oil circuit 18 and the second oil circuit 19 on the periphery adopt the method of pipeline plus throttle, and high-pressure hydraulic oil is applied to the middle part of the first oil circuit 18, which solves this problem to a great extent. Under given oil pressure conditions, the flow and pressure between the bearing seat 1 and the supporting base 7 and between the supporting base and the translation base are adjusted by the throttle to ensure that a continuous, stable and uniform oil film is formed at the two joint surfaces.

[0057] Furthermore, in order to facilitate the formation of an oil film between the support base 7 and the bearing base 1, and between the support base 7 and the translation base 11, the outlet end of the first oil circuit 18 extends to the bottom groove surface of the first groove 21 opened on the top surface of the support base 7, and the outlet end of the second oil circuit 19 extends to the bottom groove surface of the second groove 22 opened on the bottom surface of the support base 7.

[0058] Preferably, the first groove connected to the first oil path 18 communicating with the oil storage chamber is a circular groove, and the first grooves 21 connected to the other first oil paths 18 are fan-shaped grooves.

[0059] An oil return channel is also provided in the support base 7, and the oil return channel is arranged on one side of the support base 7 for returning oil into the oil tank. The oil return channel includes a first channel portion 28, the top end of the first channel portion 28 extends to the top surface of the support base 7, for receiving oil between the support base 7 and the bearing seat 1, the bottom end of the first channel portion 22 extends to the bottom surface of the support base 7, for receiving oil between the support base 7 and the translation base 11, the middle portion of the first channel portion 22 is connected to one end of the second channel portion 23, the second channel portion 23 is arranged along the radial direction of the support base 7, and the other end of the second channel portion 23 extends to the circumferential surface of the support base 7 to form an oil return port, and an oil return pipe joint is provided at the oil return port, and the oil return pipe joint is used to connect the oil tank through the oil return pipeline so that the oil flows back to the oil tank.

[0060] Furthermore, in order to achieve the control of oil pressure, multiple groups of observation flow channels are also arranged in the support base, each group having a first observation flow channel 24 and a second observation flow channel 25. In this embodiment, six oil inlet channels are arranged, and therefore six groups of observation flow channels are arranged, and each oil inlet channel corresponds to a group of observation flow channels.

[0061] The first observation flow channel 24 and the second observation flow channel 25 both adopt L-shaped flow channels, including two parts perpendicular to each other, one part is set as a vertical part along the axial direction of the support base 7, and the other part is set as a horizontal part along the radial direction of the support base 7. The top end of the vertical part of the first observation flow channel 24 extends to the top surface of the support base 7, and the bottom end of the vertical part of the second observation flow channel 25 extends to the bottom surface of the support base 7.

[0062] The horizontal parts of the first observation channel 24 and the second observation channel 25 are extended to the peripheral surface of the support base 7 to form an observation port, and a pressure detection element is installed at the observation port to detect the pressure of the oil. In this embodiment, the pressure detection element adopts a pressure sensor, and the existing equipment can be used, which is not described in detail here.

[0063] When the pressure sensor indicates that the oil pressure is insufficient, oil is injected through the oil inlet passage to increase the oil pressure.

[0064] like Figure 10-11 As shown, the support base 1 is used to support the object to be tested, and its top surface is a plane, and its bottom surface is a spherical surface that matches the bottom surface of the support base 7.

[0065] Further, such as Figure 12-13 As shown, in order to limit the movement range of the bearing seat 1 relative to the supporting base 7, a boss is provided on the top outer edge of the supporting base 7, and a limit stop 3 is fixed to the upper surface of the boss by bolts. The limit stop 3 adopts an L-shaped structure, and accordingly, a limit protrusion 27 is provided on the outer edge of the bearing seat 1. When the movement range of the bearing seat is too large, the limit protrusion can contact the horizontal part of the limit stop 3, so that the movement range of the bearing seat 1 is limited by the limit stop 3, so as to prevent the bearing seat 1 from being separated from the supporting base 7 due to external fluctuations and causing danger.

[0066] Furthermore, an annular oil retaining ring 9 is provided at the outer edge of the top surface of the translation base 11 to prevent oil from splashing around.

[0067] Preferably, Figure 14-15 As shown, the oil deflector ring 9 is provided with a plurality of fixing holes at equal intervals along the circumferential direction, and the oil deflector ring 9 is fixed to the edge of the upper surface of the translation base 11 through the fixing holes and bolts.

[0068] The outer peripheral surface of the support base 7 is provided with an anti-collision ring 8 , the position of the anti-collision ring 8 corresponds to the position of the oil retaining ring 9 , so as to prevent the support base 7 from being damaged by collision.

[0069] Further, such as Figure 16-Figure 19As shown, a plurality of threaded holes are provided on the bottom surface of the translation base 11 for fixing the translation base 11. Preferably, the plurality of threaded holes are equally spaced along the circumferential direction. An oil outlet hole is also provided on one side of the translation base 11. Both ends of the oil outlet hole extend to the top surface and the peripheral surface of the translation base respectively. An oil outlet pipe joint 10 is provided at the opening formed on the peripheral surface of the support base of the oil outlet hole. When oil leaks, the oil will flow into the translation base 11. After the experiment is over, this part of the oil will be discharged through the oil outlet hole and the oil outlet pipe joint 10.

[0070] In this embodiment, the load of the heavy object is supported by the oil film between the support base 7 and the bearing seat 1, and the oil film between the support base 7 and the translational base 11. The oil is pumped into the throttle at a constant pressure, and after a certain pressure loss, it flows into the gaps between the support base 7 and the bearing seat 1, and between the support base 7 and the translational base 11, thereby forming a supporting force.

[0071] The calculation formula for bearing capacity is:

[0072] F 承载力 =π(Rsinθ) 2 p

[0073] Wherein, p is the gap pressure between the support base 7 and the bearing seat 1, R is the radius of the spherical surface of the bearing seat 1, and θ is the angle between the radius at the intersection of the rotating bearing seat 1 and the support base 7 and the axial direction.

[0074] In this embodiment, the support base 7 and the bearing seat 1 are matched through a spherical surface, and the support base 7 and the translational base 11 are matched through a plane surface. The bearing seat is used to carry heavy loads. Through the arrangement of the oil storage chamber 16, the first oil circuit 18 and the second oil circuit 19, an oil film can be formed between the matching surfaces of the support base 7 and the bearing seat 1, and an oil film can be formed between the matching surfaces of the support base 7 and the translational base 11. The relative motion friction torque generated between the support base 7, the translational base 11 and the bearing seat 1 is small, which meets the simulation of the free boundary of the heavy load, and the oil film has extremely high stiffness, and the pressure is evenly distributed on the entire oil film. Therefore, the support base will not bear a large local pressure. Compared with the traditional method of using a suspension method to pull up the heavy load to achieve free boundary simulation, it meets the vibration modal test requirements of heavy loads with heavy weight. During the test, it only needs to fix the heavy load on the bearing seat. Compared with the suspension method, the operation difficulty is smaller, and the test efficiency is improved.

[0075] At the same time, the translation base 11 can be installed through the threaded holes at the bottom. Compared with the traditional installation method of eight sets of free suspension devices, the installation process is simpler and the operation is less difficult, which shortens the modal test time and improves the test efficiency.

[0076] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A suspended hydraulic heavy load vibration modal test platform, characterized in that: It includes a supporting base, a bearing seat is provided above the supporting base, and a translational base is provided below the supporting base, the top surface of the supporting base is matched with the spherical surface of the bearing seat, and the bottom surface of the supporting base is matched with the translational base in a plane, an oil storage chamber is provided in the supporting base, the oil storage chamber is connected with the oil inlet channel arranged on the supporting base, and the oil storage chamber is also connected with multiple first oil circuits and second oil circuits, the oil outlet end of the first oil circuit is connected to the top surface of the supporting base to form an oil film between the matching surfaces of the supporting base and the bearing base, and the oil outlet end of the second oil circuit is connected to the bottom surface of the supporting base to form an oil film between the matching surfaces of the supporting base and the translational base.

2. A suspended hydraulic heavy load vibration modal testing platform as claimed in claim 1, characterized in that: A first sealing ring is provided between the outer edge of the top surface of the support base and the bearing seat, and a second sealing ring is provided between the bottom surface of the support base and the translation base.

3. A suspended hydraulic heavy load vibration modal testing platform as claimed in claim 1, characterized in that: The oil outlet ends of the first oil circuit and the second oil circuit are provided with throttles.

4. A suspended hydraulic heavy load vibration modal testing platform as claimed in claim 3, characterized in that: The throttle comprises a throttle body, and a spiral groove is arranged on the surface of the throttle body to form an oil channel.

5. The suspended hydraulic heavy load vibration modal testing platform according to claim 1, characterized in that: The oil storage chamber is connected to a plurality of oil outlet channels, the oil outlet channels are arranged along the radial direction of the support base, and the plurality of oil outlet channels are arranged at equal intervals along the circumferential direction of the support base. A first oil circuit perpendicular to the oil outlet channel is provided above the oil outlet channel, the top center of the oil storage chamber is also connected to the first oil circuit, and a second oil circuit perpendicular to the oil outlet channel is provided below the oil outlet channel.

6. A suspended hydraulic heavy load vibration modal testing platform as claimed in claim 1, characterized in that: The oil outlet end of the first oil circuit is communicated with a first groove arranged on the top surface of the support base, and the oil outlet end of the second oil circuit is communicated with a second groove arranged on the bottom surface of the support base.

7. A suspended hydraulic heavy load vibration modal testing platform as claimed in claim 1, characterized in that: The support base is further provided with a first observation flow channel and a second observation flow channel, the inlets of the first observation flow channel and the second observation flow channel extend to the top surface of the support base, and pressure detection elements are provided at the outlets of the first observation flow channel and the second observation flow channel.

8. The suspended hydraulic heavy load vibration modal testing platform according to claim 1, characterized in that: An oil return channel is also provided in the support base, and the oil return channel includes a first channel portion, one end of the first channel portion extends to the top surface of the support base, and the other end extends to the bottom surface of the support base, the first channel portion is connected with one end of the second channel portion, and the other end of the second channel portion extends to the peripheral surface of the support base to form an oil return port, and the oil return port is used to connect to the oil tank through an oil pipe.

9. The suspended hydraulic heavy load vibration modal testing platform according to claim 1, characterized in that: A boss is provided on the top edge of the support base, and a limit stop is provided on the upper surface of the boss to limit the movement of the bearing seat.

10. The suspended hydraulic heavy load vibration modal testing platform according to claim 1, characterized in that: An oil retaining ring is arranged on the outer edge of the upper surface of the translation base.

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