Bidirectional control tuning liquid column damper and using method thereof

Abstract

The invention relates to the field of anti-vibration or vibration common building structures, in particular to a two-way control tuning liquid column damper and a using method thereof. A two-way control tuning liquid column damper comprises a liquid conveying pipe (7), a control system, an X-direction vibration control mechanism and a Y-direction vibration control mechanism, and is characterized in that the X-direction vibration control mechanism and the Y-direction vibration control mechanism are connected through the liquid conveying pipe (7); the control system comprises a control center (15), a first displacement meter (9), a second displacement meter (10), a third displacement meter (17), a liquid level meter (18), a hydraulic meter (19), a barometer (20), an electromagnetic valve (6) and a pump (16). The X-direction vibration control mechanism comprises a U-shaped liquid column damper (1); the Y-direction vibration control mechanism comprises a sliding rail (2), a spring (3), a piston rod (4), a box body (5), a barrel type semi-active damper (11), a limiting groove (12), piezoelectric ceramics (13), a sliding block (14) and a clamping block (21). The damping device is good in damping effect.

Description

Technical Field

[0001] The present invention relates to the general field of anti-vibration or shock building construction, and in particular to a bidirectionally controlled tuned liquid column damper and a method of using the same. Background Art

[0002] Natural disasters such as earthquakes and typhoons can cause great damage to buildings and infrastructure, resulting in loss of life and property. In the field of vibration control technology, one of the goals of reducing or eliminating structural vibration is to improve the disaster resistance of the structure so that it can better withstand the power of natural disasters. How to ensure that the vibration of buildings and infrastructure is better controlled requires stable operation under multi-disaster coupling; multi-directional vibration control; and vibration control devices with adjustable frequency, damping ratio, stiffness and other performance.

[0003] The traditional tuned liquid column damper is a low-cost, easy-to-install, frequency-adjustable vibration control device for building structures. It can usually only control structural vibration in a single direction and cannot achieve multi-directional vibration control. Under the action of external loads with high uncertainty, it is difficult to adjust the damping and stiffness ratio to achieve an ideal vibration control effect. Some tuned liquid column dampers that add semi-active or active control devices find it difficult to ensure energy supply and working stability in extreme environments. Summary of the invention

[0004] In order to overcome the defects of the prior art and provide a building structure with good vibration reduction effect, the present invention discloses a bidirectionally controlled tuned liquid column damper and a method of using the same.

[0005] The present invention achieves the purpose of the invention through the following technical solutions: A bidirectionally controlled tuned liquid column damper comprises a liquid delivery tube, a control system, an X-direction vibration control mechanism, and a Y-direction vibration control mechanism, and is characterized in that: The X-direction vibration control mechanism and the Y-direction vibration control mechanism are connected via an infusion tube, and the function of the infusion tube is to adjust the natural vibration frequency of the X-direction and the Y-direction in the damper plane; The control system includes: a control center, a first displacement meter, a second displacement meter, a third displacement meter, a liquid level meter, a hydraulic pressure meter, a barometer, a solenoid valve and a pump. The first displacement meter and the third displacement meter are respectively arranged in the Y direction and the X direction of the main structure to be damped and reduced, the second displacement meter is fixed between the U-shaped liquid column damper and the box body, the first displacement meter, the second displacement meter and the third displacement meter are all connected to the signal input end of the control system through a signal line, the liquid level meter is arranged at the bottom of the two vertical pipe sections of the U-shaped liquid column damper, the hydraulic pressure meter is arranged in the liquid in the box body, the air pressure meter is arranged in the air above the liquid in the box body, and the solenoid valve and the pump are both connected to the signal output end of the control system through a signal line as an actuator; The X-direction vibration control mechanism comprises a U-shaped liquid column damper, in which a liquid column is arranged, and a pump is arranged in the liquid column, and the liquid column is shaken in the X-direction in the plane to consume energy, so as to control the X-direction vibration of the structure; The Y-axis vibration control mechanism includes: a slide rail, a spring, a piston rod, a box body, a cylindrical semi-active damper, a limit groove, a piezoelectric ceramic, a slider and a block. The box body is welded and fixed on the slide rail, the cross section of the piston rod is I-shaped, the inner end of the piston rod is embedded in the box body, and the outer end of the piston rod extends out of the box body. The joints of the piston rod and the box body are coated with a sealing coating to ensure the sealing of the box body. The clamping block is arranged in the box body, and the clamping block is used to limit the movement of the piston rod in the box body. One end of the spring is fixed to the outer end of the piston rod by a clamping connection, and the other end of the spring is fixed to the U-shaped liquid column damper by a clamping connection. The second displacement meter is fixed between the U-shaped liquid column damper and the box body. The slider is T-shaped, and the slider is fixed to the bottom of the U-shaped liquid column damper. The limit groove is connected to the slide rail, and the piezoelectric ceramics are evenly laid on the slide rail. The cylinder type semi-active damper comprises a conductor rod, an electromagnet and a cylinder body, wherein the fixed end of the conductor rod is fixed to the outer end of the piston rod, the movable end of the conductor rod is arranged in the cylinder body, and the electromagnet is evenly arranged on the inner wall of the cylinder body through bolt connection; The piezoelectric ceramic is arranged on the slider. The piezoelectric ceramic converts the mechanical energy of the pressure contact between the slider and the piezoelectric ceramic into electrical energy to realize the self-power supply of the system. The piezoelectric ceramic is respectively connected to the control center, the solenoid valve, the pump and the cylindrical semi-active damper through wires to supply power to these four. The piezoelectric ceramic is a type of electronic ceramic material with piezoelectric properties that can convert mechanical energy into electrical energy. When there is an external power supply to power the tuned liquid column damper, the electrical energy generated by the piezoelectric ceramic can be stored by the battery to achieve energy saving and environmental protection. When there is no external power supply under extreme disasters, the stored power supply and the electrical energy generated during the vibration caused by the disaster can power the tuned liquid column damper. One end of the infusion tube is connected to the box body, and the other end of the infusion tube is connected to the pump at the bottom of the U-shaped liquid column damper.

[0006] The bidirectionally controlled tuned liquid column damper is characterized by: The liquid in the box is water or oil; The thickness of the sealing coating is 2cm to 5cm; The number of electromagnets is 8 to 16.

[0007] The method for using the bidirectionally controlled tuned liquid column damper is characterized by being implemented in sequence according to the following steps: The natural frequency of the U-shaped liquid column damper is related to the height of the internal liquid column. When the natural frequency of the U-shaped liquid column damper is consistent with the instantaneous vibration frequency of the structure, it has the best X-direction vibration reduction performance. Therefore, the displacement signal ux(t) of the third displacement meter arranged in the X direction of the main structure is identified by the control center using wavelet transformation to obtain the vibration frequency of the main structure in the X direction. S. X-direction control: The control center uses the internal liquid of the U-shaped liquid column damper to shake along the X direction in the plane to consume energy to control the X-direction vibration of the main structure. The specific steps are as follows The liquid level meter at the bottom of the U-shaped liquid column damper measures the height H(t) of the liquid column in the U-shaped liquid column damper in real time and feeds it back to the control center. The control center obtains the real-time vibration frequency of the U-shaped liquid column damper in the X direction according to the real-time liquid column height. If the vibration frequency of the U-shaped liquid column damper in the X direction is greater than the vibration frequency of the main structure, the solenoid valve opens, and the pump pumps liquid to the U-shaped liquid column damper through the liquid infusion tube, so that the vibration frequency of the U-shaped liquid column damper matches the vibration frequency of the main structure; If the vibration frequency of the U-shaped liquid column damper in the X direction is lower than the vibration frequency of the main structure, the solenoid valve opens, and the pump draws liquid from the U-shaped liquid column damper through the liquid delivery tube and pumps it to the box, so that the vibration frequency of the U-shaped liquid column damper matches the vibration frequency of the main structure; The U-shaped liquid column damper adjusts its own X-direction vibration frequency in real time to improve the X-direction vibration control performance; S. Y direction control: The control center also uses the U-shaped liquid column damper to slide along the slide rail in the Y direction in the plane, and works together with the spring, the cylindrical semi-active damper and the box to control the Y-direction vibration of the main structure. The specific steps are as follows: The U-shaped liquid column damper moves in the Y direction along the slide rail, driving the cylindrical semi-active damper and the spring to drive the piston rod to move, causing the closed volume in the box to change, changing the hydraulic pressure and air pressure in the box, and the pressure reaction gives the U-shaped liquid column damper a time-varying control force in the Y direction, and adjusts the restoring force of the tuned U-shaped liquid column damper in the Y direction in real time, that is, adjusts the stiffness of the U-shaped liquid column damper in the Y direction in real time, thereby adjusting the vibration frequency of the U-shaped liquid column damper in the Y direction in real time. The hydraulic pressure gauge in the liquid of the box and the barometer in the gas transmit the hydraulic pressure Pl(t) and air pressure Pg(t) in the box to the control center in real time, and the control center calculates the restoring force of the U-shaped liquid column damper in the Y direction, and obtains the real-time stiffness and vibration frequency of the U-shaped liquid column damper in the Y direction; The first displacement meter arranged in the Y direction of the main structure collects the displacement signal uy(t) of the main structure in the Y direction, and the control center obtains the vibration frequency of the main structure in the Y direction through wavelet transform; the second displacement meter arranged between the U-shaped liquid column damper and the box collects the displacement signal uyc(t) of the U-shaped liquid column damper in the Y direction; On the premise of ensuring that the volume of the liquid in the U-shaped liquid column damper remains unchanged, if the real-time vibration frequency of the U-shaped liquid column damper in the Y direction exceeds the vibration frequency of the main structure in the Y direction by %, the control center opens the solenoid valve and uses a pump to pump the liquid in the two boxes located in the Y direction of the U-shaped liquid column damper to the other two boxes, thereby reducing the nonlinear restoring force and thus reducing the vibration frequency of the U-shaped liquid column damper in the Y direction; If the real-time vibration frequency of the U-shaped liquid column damper in the Y direction is lower than the vibration frequency of the main structure in the Y direction by %, the control center opens the solenoid valve and uses the pump to pump the liquid in the other two boxes to the two boxes located in the Y direction of the U-shaped liquid column damper, thereby increasing the nonlinear restoring force and thus increasing the vibration frequency of the U-shaped liquid column damper in the Y direction; The method for using the bidirectionally controlled tuned liquid column damper is characterized in that: in step S, the cylindrical semi-active damper adjusts its own damping by changing the current of the electromagnet, thereby adjusting the damping of the Y-direction vibration control part. The specific steps are as follows: The relative movement between the conductor bar and the electromagnet along the Y direction will generate eddy current in the conductor bar due to the electromagnetic induction effect, causing the conductor bar to heat up, that is, converting kinetic energy into heat energy dissipation. Due to the complexity of external disasters, in order to achieve the best vibration reduction effect, the optimal damping force at different times is different. Specifically: The control center receives the displacement signal uyc(t) of the second displacement meter between the U-shaped liquid column damper and the box, combines it with the Y-direction displacement response signal uy(t) of the main structure, and obtains the motion phase of the U-shaped liquid column damper and the main structure in the Y direction through the Hilbert-Huang transform; When the Y-direction motion phase of the U-shaped liquid column damper is the same as the Y-direction motion phase of the main structure (i.e., the displacement direction of the U-shaped liquid column damper in the Y direction is the same as the displacement direction of the main structure in the Y direction), the amount of current is increased to increase the Y-direction damping of the U-shaped liquid column damper; When the Y-direction motion phase of the U-shaped liquid column damper is opposite to the Y-direction motion phase of the main structure (i.e., the displacement direction of the U-shaped liquid column damper in the Y direction is opposite to the displacement direction of the main structure in the Y direction), the amount of current is reduced to reduce the Y-direction damping of the U-shaped liquid column damper; Therefore, the control center adjusts the amount of current flowing into the electromagnet in real time to change the magnetic field strength and eddy current damping force thereof, thereby improving the vibration reduction effect.

[0008] The present invention has the following beneficial effects: First, the tuned liquid column damper of the present invention can adjust the bidirectional vibration frequency and stiffness in real time, and control the bidirectional vibration in the structural plane at the same time. Compared with the traditional tuned liquid column damper, it has stronger adaptability and vibration control performance.

[0009] Second, the tuned liquid column damper of the present invention can adjust its own damping in real time and has better energy dissipation and vibration reduction performance than the traditional tuned liquid column damper.

[0010] Third, the tuned liquid column damper of the present invention can control the vibration in the X direction and the Y direction in the plane, and can improve the safety and comfort of the structure compared with the traditional tuned liquid column damper.

[0011] Fourthly, the tuned liquid column damper of the present invention can ensure the energy supply stability under extreme disasters compared with the traditional tuned liquid column damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a top view of the present invention, Figure 2 is a front view of the present invention, Figure 3 It is a left side view of the present invention, Figure 4 is a cross-sectional schematic diagram of the cylindrical semi-active damper of the present invention, Figure 5 It is a control flow chart when the present invention is used.

[0013] The component names corresponding to the reference numerals are as follows: 7: Infusion tube, X-axis vibration control mechanism: 1: U-shaped liquid column damper, 16: Pump, Y-axis vibration control mechanism: 2: Slide rail, 3: Spring, 4: Piston rod, 5: Cabinet, 8: Sealing coating, 11: Cylindrical semi-active damper, 111: Conductor rod, 112: Electromagnet, 113: cylinder, 12: Limiting slot, 13: Piezoelectric ceramics, 14: Slider, 21: Card block, Control system: 15: Control center, 9: The first displacement meter, 10: Second displacement meter, 17: The third displacement meter, 18: Liquid level gauge, 19: Hydraulic gauge, 20: barometer, 6: Solenoid valve. DETAILED DESCRIPTION

[0014] The present invention is further described below by means of specific examples.

[0015] Example 1 A bidirectionally controlled tuned liquid column damper includes a liquid delivery tube 7, a control system, an X-direction vibration control mechanism, and a Y-direction vibration control mechanism, such as Figure 1 to Figure 5 As shown, the specific structure is: The X-direction vibration control mechanism and the Y-direction vibration control mechanism are connected via a liquid infusion tube 7, and the function of the liquid infusion tube 7 is to adjust the natural vibration frequency of the X-direction and the Y-direction in the damper plane; The control system includes: a control center 15, a first displacement meter 9, a second displacement meter 10, a third displacement meter 17, a liquid level meter 18, a hydraulic pressure meter 19, a barometer 20, a solenoid valve 6 and a pump 16. The first displacement meter 9 and the third displacement meter 17 are respectively arranged in the Y direction and the X direction of the main structure to be damped and reduced, the second displacement meter 10 is fixed between the U-shaped liquid column damper 1 and the box 5, the first displacement meter 9, the second displacement meter 10 and the third displacement meter 17 are all connected to the signal input end of the control system through a signal line, the liquid level meter 18 is arranged at the bottom of the two vertical pipe sections of the U-shaped liquid column damper 1, the hydraulic pressure meter 19 is arranged in the liquid in the box 5, the barometer 20 is arranged in the air above the liquid in the box 5, and the solenoid valve 6 and the pump 16 are both connected to the signal output end of the control system through a signal line as an actuator; The X-direction vibration control mechanism comprises a U-shaped liquid column damper 1, in which a liquid column is arranged, and a pump 16 is arranged in the liquid column, and the liquid column is shaken in the X-direction in the plane to consume energy, so as to control the X-direction vibration of the structure; The Y-axis vibration control mechanism includes: a slide rail 2, a spring 3, a piston rod 4, a box 5, a cylindrical semi-active damper 11, a limit groove 12, a piezoelectric ceramic 13, a slider 14 and a block 21. The box body 5 is welded and fixed on the slide rail 2, the cross section of the piston rod 4 is an I-shaped, the inner end of the piston rod 4 is embedded in the box body 5, and the outer end of the piston rod 4 extends out of the box body 5. The joints between the piston rod 4 and the box body 5 are coated with a sealing coating 8 to ensure the sealing of the box body 5. The block 21 is arranged in the box body 5, and the block 21 is used to limit the movement of the piston rod 4 in the box body 5. One end of the spring 3 is fixed to the outer end of the piston rod 4 by a snap connection, and the other end of the spring 3 is fixed to the U-shaped liquid column damper 1 by a snap connection. The second displacement meter 10 is fixed between the U-shaped liquid column damper 1 and the box body 5, the slider 14 is T-shaped, and the slider 14 is fixed to the bottom of the U-shaped liquid column damper 1, the limit groove 12 is connected to the slide rail 2, the piezoelectric ceramics 13 are evenly laid on the slide rail 2, and the thickness of the sealing coating 8 is 2cm~5cm; The cylindrical semi-active damper 11 comprises a conductor rod 111, an electromagnet 112 and a cylinder 113. The fixed end of the conductor rod 111 is fixed to the outer end of the piston rod 4, the movable end of the conductor rod 111 is arranged in the cylinder 113, and the electromagnet 112 is evenly arranged on the inner wall of the cylinder 113 by bolt connection. The number of the electromagnets 111 is 8 to 16. The piezoelectric ceramic 13 is arranged on the slider 14. The piezoelectric ceramic 13 converts the mechanical energy of the pressure contact between the slider 14 and the piezoelectric ceramic 13 into electrical energy to realize the self-power supply of the system. The piezoelectric ceramic 13 is respectively connected to the control center 15, the solenoid valve 6, the pump 16 and the cylindrical semi-active damper 11 through wires to supply power to the four. The piezoelectric ceramic is a type of electronic ceramic material with piezoelectric properties, which can convert mechanical energy into electrical energy. When there is an external power supply to power the tuned liquid column damper, the electrical energy generated by the piezoelectric ceramic can be stored by the battery to achieve energy saving and environmental protection; when there is no external power supply under extreme disasters, the stored power supply and the electrical energy generated during the vibration caused by the disaster can power the tuned liquid column damper; One end of the liquid infusion tube 7 is connected to the box body 5 , and the other end of the liquid infusion tube 7 is connected to the pump 16 at the bottom of the U-shaped liquid column damper 1 .

[0016] In this embodiment: The liquid in the box 5 is water or oil; The thickness of the sealing coating 8 is 2 cm to 5 cm; The number of the electromagnets 111 is 8 to 16.

[0017] When this embodiment is used, Figure 5 As shown, follow the steps below: The natural frequency of the U-shaped liquid column damper 1 is related to the height of the internal liquid column. When the natural frequency of the U-shaped liquid column damper 1 is consistent with the instantaneous vibration frequency of the structure, it has the best X-direction vibration reduction performance. Therefore, the control center 15 uses wavelet transformation to identify the displacement signal ux(t) of the third displacement meter 17 arranged in the X direction of the main structure to obtain the vibration frequency of the main structure in the X direction. S1. X-axis control: The control center 15 uses the internal liquid of the U-shaped liquid column damper 1 to shake along the X direction in the plane to consume energy, so as to control the X-direction vibration of the main structure. The specific steps are as follows: The liquid level meter 18 disposed at the bottom of the U-shaped liquid column damper 1 measures the height H(t) of the liquid column in the U-shaped liquid column damper 1 in real time and feeds it back to the control center 15. The control center 15 obtains the real-time vibration frequency of the U-shaped liquid column damper 1 in the X direction according to the real-time liquid column height; If the vibration frequency of the U-shaped liquid column damper 1 in the X direction is greater than the vibration frequency of the main structure, the solenoid valve 6 is opened, and the pump 16 pumps liquid to the U-shaped liquid column damper 1 through the liquid infusion tube 7, so that the vibration frequency of the U-shaped liquid column damper 1 matches the vibration frequency of the main structure; If the vibration frequency of the U-shaped liquid column damper 1 in the X direction is less than the vibration frequency of the main structure, the solenoid valve 6 is opened, and the pump 16 extracts liquid from the U-shaped liquid column damper 1 through the liquid infusion tube 7 and pumps it to the box 5, so that the vibration frequency of the U-shaped liquid column damper 1 matches the vibration frequency of the main structure; The U-shaped liquid column damper 1 adjusts its own X-direction vibration frequency in real time to improve the X-direction vibration control performance; S2. Y direction control: The control center 15 also uses the U-shaped liquid column damper 1 to slide along the slide rail 2 in the Y direction in the plane, and works together with the spring 3, the cylindrical semi-active damper 11 and the box 5 to control the Y-direction vibration of the main structure. The specific steps are as follows: The U-shaped liquid column damper 1 moves in the Y direction along the slide rail 2, driving the cylindrical semi-active damper 11 and the spring 3 to drive the piston rod 4 to move, causing the closed volume in the box 5 to change, changing the hydraulic pressure and air pressure in the box 5, and the pressure reaction gives the U-shaped liquid column damper 1 a time-varying control force in the Y direction, and real-time adjusts and tunes the restoring force of the U-shaped liquid column damper 1 in the Y direction, that is, real-time adjusts the stiffness of the U-shaped liquid column damper 1 in the Y direction, thereby real-time adjusting the vibration frequency of the U-shaped liquid column damper 1 in the Y direction, and the hydraulic pressure gauge 19 in the liquid of the box 5 and the barometer 20 in the gas transmit the hydraulic pressure Pl(t) and air pressure Pg(t) in the box 5 to the control center 15 in real time, and the control center 15 calculates the restoring force of the U-shaped liquid column damper 1 in the Y direction, and obtains the real-time stiffness and vibration frequency of the U-shaped liquid column damper 1 in the Y direction; The first displacement meter 9 arranged in the Y direction of the main structure collects the displacement signal uy(t) in the Y direction of the main structure, and the control center 15 obtains the vibration frequency of the main structure in the Y direction through wavelet transformation; the second displacement meter 10 arranged between the U-shaped liquid column damper 1 and the box 5 collects the displacement signal uyc(t) in the Y direction of the U-shaped liquid column damper 1; Under the premise of ensuring that the volume of the liquid in the U-shaped liquid column damper 1 remains unchanged, if the real-time vibration frequency of the U-shaped liquid column damper 1 in the Y direction exceeds the vibration frequency of the main structure in the Y direction by 10%, the control center 15 opens the solenoid valve 6, and uses the pump 16 to pump the liquid in the two boxes 5 in the Y direction of the U-shaped liquid column damper 1 into the other two boxes 5, thereby reducing the nonlinear restoring force and thus reducing the vibration frequency of the U-shaped liquid column damper 1 in the Y direction; If the real-time vibration frequency of the U-shaped liquid column damper 1 in the Y direction is 10% lower than the vibration frequency of the main structure in the Y direction, the control center 15 opens the solenoid valve 6 and uses the pump 16 to pump the liquid in the other two boxes 5 into the two boxes 5 located in the Y direction of movement of the U-shaped liquid column damper 1, thereby increasing the nonlinear restoring force and thus increasing the vibration frequency of the U-shaped liquid column damper 1 in the Y direction.

[0018] The cylindrical semi-active damper 11 adjusts its own damping by changing the current of the electromagnet 112, thereby adjusting the damping of the Y-axis vibration control part. The specific steps are as follows: The relative movement between the conductor bar 111 and the electromagnet 112 along the Y direction will generate eddy current in the conductor bar 111 due to the electromagnetic induction effect, causing the conductor bar 111 to heat up, that is, converting kinetic energy into heat energy for dissipation. Due to the complexity of external disasters, in order to achieve the best vibration reduction effect, the optimal damping force at different times is different. Specifically: The control center 15 receives the displacement signal uyc(t) of the second displacement meter 10 disposed between the U-shaped liquid column damper 1 and the box 5, combines the Y-direction displacement response signal uy(t) of the main structure, and obtains the motion phase of the U-shaped liquid column damper 1 and the main structure in the Y direction through the Hilbert-Huang transform; When the Y-direction motion phase of the U-shaped liquid column damper 1 is the same as the Y-direction motion phase of the main structure (i.e., the displacement direction of the U-shaped liquid column damper 1 in the Y direction is the same as the displacement direction of the main structure in the Y direction), the amount of current is increased to increase the Y-direction damping of the U-shaped liquid column damper 1; When the Y-direction motion phase of the U-shaped liquid column damper 1 is opposite to the Y-direction motion phase of the main structure (i.e., the displacement direction of the U-shaped liquid column damper 1 in the Y direction is opposite to the displacement direction of the main structure in the Y direction), the amount of current is reduced to reduce the Y-direction damping of the U-shaped liquid column damper 1; Therefore, the control center 15 is used to adjust the amount of current flowing into the electromagnet 112 in real time to change the magnetic field strength and eddy current damping force thereof, thereby improving the vibration reduction effect.

Claims

1. A bidirectionally controlled tuned liquid column damper, comprising a liquid delivery tube (7), a control system, an X-direction vibration control mechanism, and a Y-direction vibration control mechanism, wherein: The X-direction vibration control mechanism and the Y-direction vibration control mechanism are connected via a liquid infusion tube (7); The control system comprises: a control center (15), a first displacement meter (9), a second displacement meter (10), a third displacement meter (17), a liquid level meter (18), a hydraulic pressure meter (19), a barometer (20), a solenoid valve (6) and a pump (16). The first displacement meter (9) and the third displacement meter (17) are respectively arranged in the Y direction and the X direction of the main structure to be damped and reduced, the second displacement meter (10) is fixed between the U-shaped liquid column damper (1) and the box (5), the first displacement meter (9), the second displacement meter (10) and the third displacement meter (17) are all connected to the signal input end of the control system through a signal line, the liquid level meter (18) is arranged at the bottom of the two vertical pipe sections of the U-shaped liquid column damper (1), the hydraulic pressure meter (19) is arranged in the liquid in the box (5), the air pressure meter (20) is arranged in the air above the liquid in the box (5), and the solenoid valve (6) and the pump (16) are both connected to the signal output end of the control system through a signal line as an actuator; The X-axis vibration control mechanism comprises a U-shaped liquid column damper (1), a liquid column is arranged in the U-shaped liquid column damper (1), and a pump (16) is arranged in the liquid column; The Y-axis vibration control mechanism comprises: a slide rail (2), a spring (3), a piston rod (4), a box (5), a cylindrical semi-active damper (11), a limit groove (12), a piezoelectric ceramic (13), a slider (14) and a clamping block (21). The box (5) is fixed on the slide rail (2), the cross section of the piston rod (4) is I-shaped, the inner end of the piston rod (4) is embedded in the box (5), the outer end of the piston rod (4) extends out of the box (5), the joints between the piston rod (4) and the box (5) are coated with a sealing coating (8), the clamping block (21) is arranged in the box (5), one end of the spring (3) is fixed to the outer end of the piston rod (4) by a clamping connection, the other end of the spring (3) is fixed to the U-shaped liquid column damper (1) by a clamping connection, the second displacement meter (10) is fixed between the U-shaped liquid column damper (1) and the box (5), the slider (14) is T-shaped, the slider (14) is fixed to the bottom of the U-shaped liquid column damper (1), the limit groove (12) is connected to the slide rail (2), and the piezoelectric ceramic (13) is evenly laid on the slide rail (2); The cylindrical semi-active damper (11) comprises a conductor rod (111), an electromagnet (112) and a cylindrical body (113); the fixed end of the conductor rod (111) is fixed to the outer end of the piston rod (4); the movable end of the conductor rod (111) is arranged in the cylindrical body (113); and the electromagnet (112) is evenly arranged on the inner wall of the cylindrical body (113) by bolt connection; The piezoelectric ceramic (13) is arranged on the slider (14), and the piezoelectric ceramic (13) converts the mechanical energy of the pressure contact between the slider (14) and the piezoelectric ceramic (13) into electrical energy to realize the self-power supply of the system. The piezoelectric ceramic (13) is respectively connected to the control center (15), the electromagnetic valve (6), the pump (16) and the cylindrical semi-active damper (11) through wires to supply power to the four. One end of the liquid infusion tube (7) is connected to the box body (5), and the other end of the liquid infusion tube (7) is connected to the pump (16) at the bottom of the U-shaped liquid column damper (1).

2. The bidirectionally controlled tuned liquid column damper according to claim 1, characterized in that: The liquid in the box (5) is water or oil; The thickness of the sealing coating (8) is 2 cm to 5 cm; The number of the electromagnets (111) is 8 to 16.

3. The method for using the bidirectionally controlled tuned liquid column damper according to claim 1 or 2, characterized in that: Follow the steps below to implement: S1. X-axis control: The control center (15) uses the internal liquid of the U-shaped liquid column damper (1) to shake along the X direction in the plane to consume energy, so as to control the X-direction vibration of the main structure. The specific steps are as follows: A liquid level meter (18) disposed at the bottom of the U-shaped liquid column damper (1) measures the height H(t) of the liquid column in the U-shaped liquid column damper (1) in real time and feeds it back to the control center (15). The control center (15) obtains the real-time vibration frequency of the U-shaped liquid column damper (1) in the X direction based on the real-time liquid column height. If the vibration frequency of the U-shaped liquid column damper (1) in the X direction is greater than the vibration frequency of the main structure, the solenoid valve (6) is opened, and the pump (16) pumps liquid into the U-shaped liquid column damper (1) through the liquid infusion tube (7), so that the vibration frequency of the U-shaped liquid column damper (1) matches the vibration frequency of the main structure; If the vibration frequency of the U-shaped liquid column damper (1) in the X direction is less than the vibration frequency of the main structure, the solenoid valve (6) is opened, and the pump (16) extracts liquid from the U-shaped liquid column damper (1) through the liquid infusion tube (7) and pumps it into the box (5), so that the vibration frequency of the U-shaped liquid column damper (1) matches the vibration frequency of the main structure; The U-shaped liquid column damper (1) adjusts its own X-direction vibration frequency in real time, thereby improving the X-direction vibration control performance; S2. Y direction control: The control center (15) also uses the U-shaped liquid column damper (1) to slide along the slide rail (2) in the Y direction in the plane, and works together with the spring (3), the cylindrical semi-active damper (11) and the box (5) to control the Y-direction vibration of the main structure. The specific steps are as follows: The U-shaped liquid column damper (1) moves along the slide rail (2) in the Y direction, driving the cylindrical semi-active damper (11) and the spring (3) to drive the piston rod (4) to move, causing the closed volume in the box (5) to change, changing the hydraulic pressure and air pressure in the box (5), and the pressure reaction gives the U-shaped liquid column damper (1) a time-varying control force in the Y direction, real-time adjustment and tuning of the restoring force of the U-shaped liquid column damper (1) in the Y direction, that is, real-time adjustment of the Y direction of the U-shaped liquid column damper (1). The stiffness in the Y direction is adjusted in real time to adjust the vibration frequency in the Y direction of the U-shaped liquid column damper (1). The hydraulic pressure gauge (19) in the liquid of the box (5) and the barometer (20) in the gas transmit the hydraulic pressure Pl(t) and the air pressure Pg(t) in the box (5) to the control center (15) in real time. The control center (15) calculates the restoring force of the U-shaped liquid column damper (1) in the Y direction and obtains the real-time stiffness and vibration frequency in the Y direction of the U-shaped liquid column damper (1); A first displacement meter (9) arranged in the Y direction of the main structure collects a displacement signal uy(t) of the main structure in the Y direction, and a control center (15) obtains the vibration frequency of the main structure in the Y direction through wavelet transformation; a second displacement meter (10) arranged between the U-shaped liquid column damper (1) and the box (5) collects a displacement signal uyc(t) of the U-shaped liquid column damper (1) in the Y direction; On the premise of ensuring that the volume of the liquid in the U-shaped liquid column damper (1) remains unchanged, if the real-time vibration frequency of the U-shaped liquid column damper (1) in the Y direction exceeds the vibration frequency of the main structure in the Y direction by 10%, the control center (15) opens the solenoid valve (6) and uses the pump (16) to pump the liquid in the two boxes (5) located in the Y direction of the U-shaped liquid column damper (1) into the other two boxes (5), thereby reducing the nonlinear restoring force and thus reducing the vibration frequency of the U-shaped liquid column damper (1) in the Y direction; If the real-time vibration frequency of the U-shaped liquid column damper (1) in the Y direction is lower than the vibration frequency of the main structure in the Y direction by 10%, the control center (15) opens the solenoid valve (6) and uses the pump (16) to pump the liquid in the other two boxes (5) into the two boxes (5) located in the Y direction of movement of the U-shaped liquid column damper (1), thereby increasing the nonlinear restoring force and thus increasing the vibration frequency of the U-shaped liquid column damper (1) in the Y direction.

4. The method for using the bidirectionally controlled tuned liquid column damper according to claim 3, characterized in that: In step S2, the cylindrical semi-active damper (11) adjusts its own damping by changing the current of the electromagnet (112), thereby adjusting the damping of the Y-direction vibration control part. The specific steps are as follows: The relative movement between the conductor bar (111) and the electromagnet (112) along the Y direction generates eddy current electricity in the conductor bar (111) due to the electromagnetic induction effect, causing the conductor bar (111) to heat up, that is, converting kinetic energy into heat energy for dissipation; The control center (15) receives a displacement signal uyc(t) from a second displacement meter (10) disposed between the U-shaped liquid column damper (1) and the housing (5), combines the Y-direction displacement response signal uy(t) of the main structure, and obtains the motion phase of the U-shaped liquid column damper (1) and the main structure in the Y direction through Hilbert-Huang transformation; When the Y-direction motion phase of the U-shaped liquid column damper (1) is the same as the Y-direction motion phase of the main structure, the amount of current is increased to increase the Y-direction damping of the U-shaped liquid column damper (1); When the Y-direction motion phase of the U-shaped liquid column damper (1) is opposite to the Y-direction motion phase of the main structure, the amount of current is reduced, thereby reducing the Y-direction damping of the U-shaped liquid column damper (1).

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