Vibration test system for superconducting maglev train suspension frame

Abstract

The present invention provides a vibration test system for a suspension frame of a superconducting maglev train, the system comprising a ground mounting assembly, a vibration platform, a vertical hydraulic excitation assembly and a transverse hydraulic excitation assembly, the ground coil side beam and the suspension frame are arranged on the vibration platform, the ground coil module is arranged in the ground coil side beam, the vertical hydraulic excitation assembly comprises a plurality of vertical hydraulic actuators, the plurality of vertical hydraulic actuators are arranged on the ground mounting assembly at intervals along the vertical direction, the plurality of vertical hydraulic actuators are used to apply a vertical actuating force to the vibration platform, the transverse hydraulic excitation assembly comprises at least one transverse hydraulic actuator, the transverse hydraulic excitation assembly is arranged on the ground mounting assembly in the transverse direction, and the transverse hydraulic actuator is used to apply a transverse actuating force to the vibration platform. The technical solution of the present invention is applied to solve the technical problems in the prior art that the coil of the suspension frame test system is seriously heated, the heat dissipation device is difficult to design, the motor capacity is large and the current control is difficult.

Description

Technical Field

[0001] The present invention relates to the technical field of maglev vehicle test devices, and particularly to a vibration test system for a suspension frame of a superconducting maglev train. Background Art

[0002] Superconducting electromagnetic suspension vehicles (EDS) generally adopt sidewall suspension. Ground suspension guide coils and ground propulsion coils are arranged on both sidewalls of a U-shaped track, superconducting electromagnets are arranged on both sides of the suspension frame, the magnetic field generated by the ground propulsion coils acts on the superconducting magnets to push the vehicle to run, and the magnetic field generated by the superconducting magnets cuts the ground suspension coils to form induced current and induced electric field. Suspension and guidance are achieved by the interaction between the induced electric field and the superconducting magnets. Since the maglev of the superconducting electric system can only provide sufficient suspension force and guidance force when the vehicle runs at a certain speed, in order to conduct a bench test before the vehicle is put into operation to verify its running performance, a vibration test bench for the suspension frame of the superconducting electric system needs to be designed.

[0003] Patent JPA2004282956 designed a test device for realizing static suspension and dynamic vibration simulation by actively controlling the current of the ground coils in view of the problem that superconducting maglev cannot achieve static suspension. The device includes a pair of ground coil side beams, and ground coil modules are installed on the ground coil side beams. Static suspension of the superconducting magnet and the suspension frame is achieved by separately controlling the DC components of the currents of each coil in the ground module, and dynamic vibration simulation of the superconducting magnet and the suspension frame is achieved by controlling the AC components of the currents of each coil in the coil module.

[0004] The patent "Electromagnetic Vibration Device with Magnetic Support and Vibration Method" (JPA2004282956) has realized the bench test of superconducting electric system magnets and suspension frames, but there are also several disadvantages: First, in order to carry out dynamic performance tests of superconducting magnets and suspension frames, the coil modules need to pass a large amount of direct current and alternating current for a long time, resulting in serious coil heating, difficult design of heat dissipation devices, and large motor capacity; Second, the active control of the AC component of each coil leads to extremely difficult design of the control system; Third, the ground coils are installed on a pair of ground coil side beams, and the side beams are installed on the ground of the test site, while the vehicle actually runs on the U-shaped track beam, and there are significant differences in its mass and stiffness from the ground coil side beams. Therefore, this device cannot simulate vehicle-track coupling vibration. Summary of the Invention

[0005] The present invention provides a vibration test system for a suspension frame of a superconducting maglev train, which can solve the technical problems of serious coil heating, difficult design of heat dissipation devices, large motor capacity and great difficulty in current control in the existing suspension frame test system.

[0006] The present invention provides a vibration test system for a suspension frame of a superconducting maglev train. The vibration test system includes: a ground mounting assembly; a vibration platform, on which a ground coil side beam and a suspension frame are arranged, a ground coil module is arranged in the ground coil side beam, and the ground coil module is connected to a power-on cable; a vertical hydraulic excitation assembly, which includes a plurality of vertical hydraulic actuators, the plurality of vertical hydraulic actuators are arranged at intervals in the vertical direction on the ground mounting assembly, and the plurality of vertical hydraulic actuators are used to apply a vertical acting force to the vibration platform; a lateral hydraulic excitation assembly, which includes at least one lateral hydraulic actuator, the lateral hydraulic excitation assembly is arranged in the lateral direction on the ground mounting assembly, and the lateral hydraulic actuator is used to apply a lateral acting force to the vibration platform.

[0007] Further, the vibration platform has a plurality of mass block accommodation cavities, the plurality of mass block accommodation cavities are used to install mass blocks, and the vibration test system realizes the simulation of the mass of the track beam by adjusting the number of mass blocks.

[0008] Further, the vibration test system for the suspension frame of the superconducting maglev train further includes a stiffness platform and a spring assembly. The spring assembly includes a plurality of springs. The vertical hydraulic excitation assembly is connected to the stiffness platform, the stiffness platform is connected to the vibration platform through the spring assembly, and the lateral hydraulic excitation assembly is connected to the stiffness platform. The vibration test system realizes the simulation of the stiffness of the track beam by adjusting the number of springs in the spring assembly.

[0009] Further, the vibration test system for the suspension frame of the superconducting maglev train further includes a top mounting frame, a top hydraulic actuator, a top counterweight platform and an air spring loading platform. The top mounting frame is arranged on the ground mounting assembly and is located above the suspension frame. The top hydraulic actuator is arranged on the top mounting frame. The top counterweight platform is connected to the top hydraulic actuator, and the top counterweight platform is used to counterweight the suspension frame. The air spring loading platform is arranged on the top counterweight platform. The top hydraulic actuator applies a set force to the air spring of the suspension frame through the air spring loading platform to simulate the unsprung mass of the suspension frame.

[0010] Further, the vibration test system further includes a longitudinal fixing device, which is arranged on the vibration platform and is used to limit the longitudinal displacement of the suspension frame to realize the longitudinal positioning of the suspension frame.

[0011] Further, the vibration test system further includes a slide rail, and a plurality of vertical hydraulic actuators are arranged on the slide rail.

[0012] Further, the vibration test system further includes a vertical velocity sensor, a vertical acceleration sensor, a vertical displacement sensor, a lateral velocity sensor, a lateral acceleration sensor, and a lateral displacement sensor. The vertical velocity sensor, the vertical acceleration sensor, and the vertical displacement sensor are all arranged inside the vertical hydraulic excitation assembly. The vertical velocity sensor is used to monitor the velocity of the vertical hydraulic excitation assembly, the vertical acceleration sensor is used to monitor the acceleration of the vertical hydraulic excitation assembly, and the vertical displacement sensor is used to monitor the displacement of the vertical hydraulic excitation assembly. The lateral velocity sensor, the lateral acceleration sensor, and the lateral displacement sensor are all arranged inside the lateral hydraulic excitation assembly. The lateral velocity sensor is used to monitor the velocity of the lateral hydraulic excitation assembly, the lateral acceleration sensor is used to monitor the acceleration of the lateral hydraulic excitation assembly, and the lateral displacement sensor is used to monitor the displacement of the lateral hydraulic excitation assembly.

[0013] Further, the vibration test system further includes a first acceleration sensor, a second acceleration sensor, and a third acceleration sensor. The first acceleration sensor is arranged on the vibration platform to monitor the acceleration of the vibration platform, the second acceleration sensor is arranged on the stiffness platform to monitor the acceleration of the stiffness platform, and the third acceleration sensor is arranged on the suspension frame to monitor the acceleration of the suspension frame.

[0014] Further, the vibration test system further includes a first spherical bearing and a second spherical bearing. The lateral hydraulic excitation assembly is connected to the stiffness platform through the first spherical bearing, and the lateral excitation assembly is connected to the ground mounting assembly through the second spherical bearing. The lateral hydraulic excitation assembly can rotate around the lateral direction through the first spherical bearing and the second spherical bearing.

[0015] Further, the ground mounting assembly includes a ground mounting platform and a lateral hydraulic mounting seat. The lateral hydraulic mounting seat is arranged on the ground mounting platform, and the lateral hydraulic excitation assembly is connected to the lateral hydraulic mounting seat.

[0016] Applying the technical solution of the present invention, a vibration test system for a suspension frame of a superconducting maglev train is provided. The vibration test system applies a vertical acting force to the vibration platform through a vertical hydraulic actuator and a lateral acting force to the vibration platform through a lateral hydraulic actuator, thereby realizing the vibration simulation of the superconducting magnet and the suspension frame, without the need to pass a high alternating current into the ground coil module, thereby reducing the design difficulty of the coil module, reducing the heat generation of the coil, and reducing the motor capacity. Moreover, the hydraulic actuation system is a common vibration table vibration device, and precise vibration combination can be achieved through a computer, with a simple structure and convenient control. Description of the Drawings

[0017] The accompanying drawings included are used to provide a further understanding of the embodiments of the present invention, which form a part of the specification, for illustrating the embodiments of the present invention, and for explaining the principles of the present invention together with the written description. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 The structural schematic diagram of the vibration test system of the suspension frame of a superconducting maglev train provided according to a specific embodiment of the present invention is shown;

[0019] Figure 2 is shown Figure 1 The front view of the vibration test system of the suspension frame of the superconducting maglev train provided in

[0020] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0021] 10, ground mounting assembly; 11, ground mounting platform; 12, lateral hydraulic mounting seat; 20, vibration platform; 20a, mass block accommodation cavity; 30, vertical hydraulic excitation assembly; 40, lateral hydraulic excitation assembly; 50, stiffness platform; 60, spring assembly; 70, top mounting frame; 71, top support device; 72, vertical support leg; 80, top hydraulic actuator; 90, top counterweight platform; 100, air spring loading platform; 110, longitudinal fixing device; 120, slide rail; 200, suspension frame; 300, ground coil side beam; 400, ground coil module; 500, energized cable. Specific embodiments

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0025] As Figure 1 and Figure 2 As shown, according to a specific embodiment of the present invention, a vibration test system for a suspension frame of a superconducting maglev train is provided. The vibration test system includes a ground mounting assembly 10, a vibration platform 20, a vertical hydraulic excitation assembly 30, and a lateral hydraulic excitation assembly 40. A ground coil side beam 300 and a suspension frame 200 are disposed on the vibration platform 20. A ground coil module 400 is disposed within the ground coil side beam 300. The ground coil module 400 is connected to a power-on cable 500. The vertical hydraulic excitation assembly 30 includes a plurality of vertical hydraulic actuators. The plurality of vertical hydraulic actuators are spaced apart in the vertical direction on the ground mounting assembly 10. The plurality of vertical hydraulic actuators are configured to apply a vertical actuating force to the vibration platform 20. The lateral hydraulic excitation assembly 40 includes at least one lateral hydraulic actuator. The lateral hydraulic excitation assembly 40 is disposed in the lateral direction on the ground mounting assembly 10. The lateral hydraulic actuator is configured to apply a lateral actuating force to the vibration platform 20.

[0026] By applying this configuration method, a vibration test system for the suspension frame of a superconducting maglev train is provided. The vibration test system applies a vertical driving force to the vibration platform through a vertical hydraulic actuator and a lateral driving force to the vibration platform through a lateral hydraulic actuator, thereby realizing the vibration simulation of the superconducting magnet and the suspension frame. There is no need to introduce a high alternating current into the ground coil module, which reduces the design difficulty of the coil module, reduces the heat generation of the coil, and reduces the motor capacity. Moreover, the hydraulic driving system is a common vibration device for a vibration table, and precise vibration combination can be achieved through a computer. The structure is simple and the control is convenient.

[0027] As a specific embodiment of the present invention, as Figure 1 shown, the vibration test system includes four vertical hydraulic actuators and four lateral hydraulic actuators. The four vertical hydraulic actuators are arranged at intervals on the ground mounting assembly. The connection lines of the four vertical hydraulic actuators form a rectangular quadrilateral. When the two vertical hydraulic actuators in front of the rectangular quadrilateral along the length direction of the ground coil side beam are simultaneously in the retracted state (extended state), the two hydraulic actuators at the back are simultaneously in the extended state (retracted state), so as to be able to drive the suspension frame to move in the pitching direction, that is, to simulate the vibration posture of the suspension frame nodding; when the two vertical hydraulic actuators on the left side of the rectangular quadrilateral along the length direction of the ground coil side beam are simultaneously in the retracted state (extended state), the two hydraulic actuators on the right side are simultaneously in the extended state (retracted state), so as to be able to drive the suspension frame to move in the rolling direction, that is, to simulate the vibration posture of the suspension frame rolling; when the vertical hydraulic actuator at the upper left corner of the rectangular quadrilateral and the vertical hydraulic actuator at the lower right corner of the rectangular quadrilateral are simultaneously in the retracted state (extended state), the vertical hydraulic actuator at the lower left corner of the rectangular quadrilateral and the vertical hydraulic actuator at the upper right corner of the rectangular quadrilateral are simultaneously in the extended state (retracted state), so as to be able to simulate the vibration state of the suspension frame floating and sinking. The four lateral hydraulic actuators are all arranged on one side of the vibration platform 20. When the first two lateral hydraulic actuators among the four lateral hydraulic actuators are simultaneously in the retracted state (extended state) and the last two lateral hydraulic actuators are simultaneously in the extended state (retracted state), so as to be able to drive the suspension frame to move in the yaw direction, that is, to simulate the vibration of the suspension frame shaking its head; when the four lateral hydraulic actuators are simultaneously in the retracted state (extended state), so as to be able to simulate the vibration characteristics of the lateral posture of the suspension frame.

[0028] Further, in the present invention, in order to avoid restricting the vertical vibration of the vibration platform, the vibration test system may be configured to further include a first spherical bearing and a second spherical bearing. The lateral hydraulic excitation assembly 40 is connected to the stiffness platform 50 through the first spherical bearing, and the lateral excitation assembly is connected to the ground mounting assembly 10 through the second spherical bearing. The lateral hydraulic excitation assembly 40 can rotate around the lateral direction through the first spherical bearing and the second spherical bearing, that is, the lateral hydraulic excitation assembly 40 can perform a nodding action. In the present invention, the vertical direction is the vertical direction, the longitudinal direction is the length direction of the ground coil side beam, which also refers to the forward direction of the vehicle, and the lateral direction is the direction perpendicular to both the vertical direction and the longitudinal direction.

[0029] In addition, in the present invention, in order to facilitate the installation of the lateral hydraulic actuator, the ground mounting assembly 10 may be configured to include a ground mounting platform 11 and a lateral hydraulic mounting seat 12. The lateral hydraulic mounting seat 12 is disposed on the ground mounting platform 11, and the lateral hydraulic excitation assembly 40 is connected to the lateral hydraulic mounting seat 12.

[0030] Further, in the present invention, in order to simulate the mass of the track beam, the vibration platform 20 may be configured to have a plurality of mass block receiving cavities 20a for installing mass blocks. The vibration test system simulates the mass of the track beam by adjusting the number of mass blocks.

[0031] In the present invention, in order to study the vehicle-track coupled vibration and simulate the stiffness of the track beam, the vibration test system of the superconducting maglev train suspension frame may be configured to further include a stiffness platform 50 and a spring assembly 60. The spring assembly 60 includes a plurality of springs. The vertical hydraulic excitation assembly 30 is connected to the stiffness platform 50. The stiffness platform 50 is connected to the vibration platform 20 through the spring assembly 60. The lateral hydraulic excitation assembly 40 is connected to the stiffness platform 50. The vibration test system simulates the stiffness of the track beam by adjusting the number of springs in the spring assembly 60.

[0032] As a specific embodiment of the present invention, as Figure 1 shown, the springs are rigid springs. There are 4*7 rigid spring mounting seats provided at the lower end of the vibration platform 20. 8 rigid springs are disposed on 8 of the rigid spring mounting seats. The 8 rigid springs are connected to the stiffness platform 50. The support stiffness of the track beam can be simulated by increasing or decreasing the number of rigid springs.

[0033] Further, in the present invention, in order to simulate the unsprung mass of the suspension frame, the vibration test system of the superconducting maglev train suspension frame can be configured to further include a top mounting frame 70, a top hydraulic actuator 80, a top counterweight platform 90, and an air spring loading platform 100. The top mounting frame 70 is arranged on the ground mounting assembly 10 and is located above the suspension frame. The top hydraulic actuator 80 is arranged on the top mounting frame 70. The top counterweight platform 90 is connected to the top hydraulic actuator 80. The top counterweight platform 90 is used to counterweight the suspension frame. The air spring loading platform 100 is arranged on the top counterweight platform 90. The top hydraulic actuator 80 applies a set force to the air spring of the suspension frame through the air spring loading platform 100 to simulate the unsprung mass of the suspension frame.

[0034] As a specific embodiment of the present invention, the top mounting frame 70 includes a top support device 71 and vertical support legs 72. There are four vertical support legs 72, and the four vertical support legs 72 are arranged on the top support device 71. The top counterweight platform 90 is connected to the top support device 71 through the top hydraulic actuator 80.

[0035] Further, in the present invention, in order to prevent the suspension frame from moving significantly longitudinally during the test, the vibration test system can be configured to further include a longitudinal fixing device 110. The longitudinal fixing device 110 is arranged on the vibration platform 20, and the longitudinal fixing device 110 is used to limit the longitudinal displacement of the suspension frame to achieve longitudinal positioning of the suspension frame. As a specific embodiment of the present invention, a stop block can be used as the longitudinal fixing device 110.

[0036] In addition, in the present invention, in order to expand the use range of the test system so that it can be adjusted according to the size of the object to be measured, and can perform vibration tests on the suspension frame of a single car body as well as on the suspension frame of the entire car body, the vibration test system can be configured to further include a slide rail 120, and a plurality of vertical hydraulic actuators are arranged on the slide rail 120. Through this setting, the distribution positions of the respective vertical hydraulic actuators can be adjusted according to the actual size of the object to be measured, so that they can be evenly distributed at the bottom of the object to be measured, thereby improving the accuracy of the test.

[0037] Furthermore, in the present invention, in order to be able to obtain the velocity, acceleration, and displacement information during the vibration test in real time, the vibration test system can be configured to further include a vertical velocity sensor, a vertical acceleration sensor, a vertical displacement sensor, a lateral velocity sensor, a lateral acceleration sensor, and a lateral displacement sensor. The vertical velocity sensor, the vertical acceleration sensor, and the vertical displacement sensor are all arranged in the vertical hydraulic excitation assembly 30. The vertical velocity sensor is used to monitor the velocity of the vertical hydraulic excitation assembly 30, the vertical acceleration sensor is used to monitor the acceleration of the vertical hydraulic excitation assembly 30, and the vertical displacement sensor is used to monitor the displacement of the vertical hydraulic excitation assembly 30. The lateral velocity sensor, the lateral acceleration sensor, and the lateral displacement sensor are all arranged in the lateral hydraulic excitation assembly 40. The lateral velocity sensor is used to monitor the velocity of the lateral hydraulic excitation assembly 40, the lateral acceleration sensor is used to monitor the acceleration of the lateral hydraulic excitation assembly 40, and the lateral displacement sensor is used to monitor the displacement of the lateral hydraulic excitation assembly 40.

[0038] In addition, in the present invention, in order to be able to record the vibration acceleration during the vibration test in real time, so as to study the stability and safety of the suspension frame under the magnetic track coupling vibration, the vibration test system can be configured to further include a first acceleration sensor, a second acceleration sensor, and a third acceleration sensor. The first acceleration sensor is arranged on the vibration platform 20 to monitor the acceleration of the vibration platform 20, the second acceleration sensor is arranged on the stiffness platform 50 to monitor the acceleration of the stiffness platform 50, and the third acceleration sensor is arranged on the suspension frame to monitor the acceleration of the suspension frame.

[0039] For a further understanding of the present invention, the following will Figure 1 and Figure 2 be used to elaborate in detail on the vibration test system of the suspension frame of the superconducting maglev train provided by the present invention.

[0040] As Figure 1 and Figure 2 shown, according to a specific embodiment of the present invention, a vibration test system for the suspension frame of a superconducting maglev train is provided. The vibration test system includes a ground mounting platform 11, a lateral hydraulic mounting seat 12, four vertical hydraulic actuators, four lateral hydraulic actuators, a vibration platform 20, a stiffness platform 50, a spring assembly 60, a top mounting frame 70, a top hydraulic actuator 80, a top counterweight platform 90, an air spring loading platform 100, a longitudinal fixing device 110, and a slide rail 120.

[0041] The vertical hydraulic actuator is fixed on the slide rail 120 of the ground mounting platform 11 by bolts. The vertical hydraulic actuators are symmetrically arranged to avoid applying eccentric loads. The four horizontal hydraulic actuators are connected to one side of the stiffness platform 50 through spherical bearings. The horizontal hydraulic actuators can rotate freely around the axis, thus avoiding restricting the vertical vibration of the vibration platform 20. The hydraulic actuators are controlled by a computer. Through the vertical hydraulic actuators, the vibration postures of the suspension frame such as floating, rolling and nodding can be simulated. Through the horizontal hydraulic actuators, the vibration characteristics of the suspension frame in yawing and lateral postures can be simulated.

[0042] The ground mounting platform 11 is provided with a slide rail for adjusting the vertical hydraulic exciter and an actuator mounting seat. Both the horizontal hydraulic actuator and the vertical hydraulic actuator are controlled by a computer and can precisely control the actions of the hydraulic actuators. The lower end of the vertical hydraulic actuator is fixed on the actuator mounting seat that can move along the slide rail. The horizontal hydraulic actuators are distributed on one side of the stiffness platform. The two ends of each horizontal hydraulic actuator are respectively fixed on the stiffness platform and the lateral hydraulic mounting seat 12 on one side through spherical bearings. The horizontal hydraulic actuator can perform a nodding action (i.e., movement in the pitching direction) around the spherical bearing, avoiding restricting the vertical displacement of the vibration platform.

[0043] In order to minimize the mass of the platform itself as much as possible, both the vibration platform 20 and the stiffness platform 50 are hollow frame structures welded by I-shaped non-magnetic steel. The ground coil side beam 300 is fixed on the upper end of the vibration platform 20 by bolts. The ground coil module 400 is externally connected to the equipment power supply through the power cable 500. The power cable 500 can supply power to the ground coil module 400. When energized, the ground coil module 400 generates a magnetic field, and the electromagnetic force generated between it and the superconducting magnet on the suspension frame is used to realize the suspension and fixation of the suspension frame. The longitudinal fixing device 110 is fixed above the vibration platform 20 by bolts. The longitudinal fixing device 110 realizes the longitudinal positioning of the suspension frame 200 by restricting the longitudinal displacement of the support wheels of the suspension frame. There are 4x7 rigid spring mounting seats at the lower end of the vibration platform 20, which are connected to the stiffness platform 50 through eight rigid springs. By increasing or decreasing the number of springs, the support stiffness of the track beam can be simulated. There is a mass block accommodation cavity 20a on the vibration platform 20. The mass block can be fixed in the mass block accommodation cavity 20a of the vibration platform 20 by bolts. By changing the number of mass blocks, the mass of the vibration platform can be adjusted to accurately simulate the mass of the track beam.

[0044] The vibration test system includes a vertical velocity sensor, a vertical acceleration sensor, a vertical displacement sensor, a lateral velocity sensor, a lateral acceleration sensor, and a lateral displacement sensor. The vertical velocity sensor, the vertical acceleration sensor, and the vertical displacement sensor are all arranged inside the vertical hydraulic excitation assembly 30. The vertical velocity sensor is used to monitor the velocity of the vertical hydraulic excitation assembly 30, the vertical acceleration sensor is used to monitor the acceleration of the vertical hydraulic excitation assembly 30, and the vertical displacement sensor is used to monitor the displacement of the vertical hydraulic excitation assembly 30. The lateral velocity sensor, the lateral acceleration sensor, and the lateral displacement sensor are all arranged inside the lateral hydraulic excitation assembly 40. The lateral velocity sensor is used to monitor the velocity of the lateral hydraulic excitation assembly 40, the lateral acceleration sensor is used to monitor the acceleration of the lateral hydraulic excitation assembly 40, and the lateral displacement sensor is used to monitor the displacement of the lateral hydraulic excitation assembly 40. At the same time, acceleration sensors are arranged on the vibration platform 20, the stiffness platform 50, and the suspension frame 200 to record the vibration acceleration during the vibration test. The obtained test information can be used to study the stability and safety of the suspension frame under the magneto-rail coupling vibration.

[0045] The top counterweight platform 90, four vertical support legs 72, a top support device 71, four top hydraulic actuators 80, a secondary spring loading platform 100, and a top counterweight platform 90 are all assembled by bolts. When the top counterweight platform 90 counterweights the suspension frame 200, the secondary spring loading platform 100 is located on the secondary springs of the suspension frame 200, and the actuator loading can be accurately simulated by computer control to simulate the unsprung mass of the suspension frame.

[0046] In summary, the present invention provides a vibration test system for a superconducting maglev train suspension frame. The vibration test system is simple to control and has mature technology. By using a hydraulic actuator device, the vibration simulation of the superconducting magnet and the suspension frame is realized, without the need to pass a high alternating current into the ground coil module, thereby reducing the design difficulty of the ground coil module, reducing the heat generation of the coil, and reducing the motor capacity. Moreover, the hydraulic actuator system is a common vibration table vibration device, and precise vibration combination can be achieved through a computer, with a simple structure and convenient control. In addition, the side beam equipped with the ground coil module is fixed on the vibration platform, and the vibration platform is connected to the stiffness platform through a spring assembly. By adjusting the mass block and the number of springs of the vibration platform, the simulation of various track beam characteristics can be realized, thereby realizing the test simulation of the magneto-rail coupling vibration of the superconducting maglev train suspension frame.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0048] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0049] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vibration test system for a superconducting maglev train suspension frame, characterized in that: The vibration test system comprises: Ground mounting assembly (10); A vibration platform (20), a ground coil side beam and a suspension frame are arranged on the vibration platform (20), a ground coil module is arranged in the ground coil side beam, and the ground coil module is connected to a powered cable; A vertical hydraulic vibration excitation component (30), the vertical hydraulic vibration excitation component (30) comprising a plurality of vertical hydraulic actuators, the plurality of vertical hydraulic actuators being arranged on the ground mounting component (10) at intervals in a vertical direction, the plurality of vertical hydraulic actuators being used to apply a vertical actuating force to the vibration platform (20); A lateral hydraulic vibration excitation component (40), the lateral hydraulic vibration excitation component (40) comprising at least one lateral hydraulic actuator, the lateral hydraulic vibration excitation component (40) being arranged on the ground mounting component (10) in a lateral direction, the lateral hydraulic actuator being used to apply lateral actuation force to the vibration platform (20), the vibration platform (20) having a plurality of mass block accommodating cavities (20a), the plurality of mass block accommodating cavities (20a) being used to install mass blocks, the vibration test system simulating the mass of the track beam by adjusting the number of the mass blocks; the vibration test system also comprising a vertical velocity sensor, a vertical acceleration sensor, a vertical displacement sensor, a lateral velocity sensor, a lateral acceleration sensor and a lateral displacement sensor, the vertical velocity sensor, the vertical acceleration sensor and The vertical displacement sensors are all arranged in the vertical hydraulic vibration assembly (30); the vertical velocity sensor is used to monitor the velocity of the vertical hydraulic vibration assembly (30); the vertical acceleration sensor is used to monitor the acceleration of the vertical hydraulic vibration assembly (30); and the vertical displacement sensor is used to monitor the displacement of the vertical hydraulic vibration assembly (30); the lateral velocity sensor, the lateral acceleration sensor and the lateral displacement sensor are all arranged in the lateral hydraulic vibration assembly (40); the lateral velocity sensor is used to monitor the velocity of the lateral hydraulic vibration assembly (40); the lateral acceleration sensor is used to monitor the acceleration of the lateral hydraulic vibration assembly (40); and the lateral displacement sensor is used to monitor the displacement of the lateral hydraulic vibration assembly (40).

2. The vibration test system for the superconducting maglev train suspension frame according to claim 1 is characterized in that: The vibration test system of the superconducting maglev train suspension frame also includes a stiffness platform (50) and a spring assembly (60), wherein the spring assembly (60) includes a plurality of springs, the vertical hydraulic excitation assembly (30) is connected to the stiffness platform (50), the stiffness platform (50) is connected to the vibration platform (20) via the spring assembly (60), and the transverse hydraulic excitation assembly (40) is connected to the stiffness platform (50). The vibration test system simulates the stiffness of the track beam by adjusting the number of springs in the spring assembly (60).

3. The vibration test system for the superconducting maglev train suspension frame according to claim 2 is characterized in that: The vibration test system of the superconducting maglev train suspension frame also includes a top mounting frame (70), a top hydraulic actuator (80), a top counterweight platform (90) and an empty spring loading platform (100). The top mounting frame (70) is arranged on the ground mounting assembly (10) and is located at the upper part of the suspension frame. The top hydraulic actuator (80) is arranged on the top mounting frame (70). The top counterweight platform (90) is connected to the top hydraulic actuator (80). The top counterweight platform (90) is used to counterweight the suspension frame. The empty spring loading platform (100) is arranged on the top counterweight platform (90). The top hydraulic actuator (80) applies a set force to the empty spring of the suspension frame through the empty spring loading platform (100) to simulate the spring mass of the suspension frame.

4. The vibration test system for the superconducting maglev train suspension frame according to claim 3 is characterized in that: The vibration test system further comprises a longitudinal fixing device (110), wherein the longitudinal fixing device (110) is arranged on the vibration platform (20), and the longitudinal fixing device (110) is used to limit the longitudinal displacement of the suspension frame to achieve longitudinal positioning of the suspension frame.

5. The vibration test system for the superconducting maglev train suspension frame according to claim 4 is characterized in that: The vibration test system also includes a slide rail (120), and a plurality of the vertical hydraulic actuators are arranged on the slide rail (120).

6. The vibration test system for the superconducting maglev train suspension frame according to claim 2, characterized in that: The vibration test system further comprises a first acceleration sensor, a second acceleration sensor and a third acceleration sensor, wherein the first acceleration sensor is arranged on the vibration platform (20) to monitor the acceleration of the vibration platform (20), the second acceleration sensor is arranged on the rigidity platform (50) to monitor the acceleration of the rigidity platform (50), and the third acceleration sensor is arranged on the suspension frame to monitor the acceleration of the suspension frame.

7. The vibration test system for the superconducting maglev train suspension frame according to claim 2, characterized in that: The vibration test system further comprises a first joint bearing and a second joint bearing, the transverse hydraulic vibration excitation assembly (40) being connected to the rigidity platform (50) via the first joint bearing, the transverse hydraulic vibration excitation assembly (40) being connected to the ground mounting assembly (10) via the second joint bearing, and the transverse hydraulic vibration excitation assembly (40) being rotatable in a transverse direction via the first joint bearing and the second joint bearing.

8. The vibration test system for the superconducting maglev train suspension frame according to claim 7, characterized in that: The ground mounting assembly (10) comprises a ground mounting platform (11) and a transverse hydraulic mounting seat (12); the transverse hydraulic mounting seat (12) is arranged on the ground mounting platform (11); and the transverse hydraulic excitation assembly (40) is connected to the transverse hydraulic mounting seat (12).

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