Bi-directionally controlled tuned liquid column damper and method of using same

Abstract

The present invention relates to the field of general building structures for preventing vibration or shock, and specifically to a two-way controlled tuned liquid column damper and its usage method. A two-way controlled tuned liquid column damper includes an infusion pipe (7), a control system, an X-direction vibration control mechanism, and a Y-direction vibration control mechanism. It is characterized in that: the X-direction vibration control mechanism and the Y-direction vibration control mechanism are connected through the infusion pipe (7); 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 meter (19), a barometer (20), a solenoid valve (6), and a pump (16); the X-direction vibration control mechanism includes a U-shaped liquid column damper (1); the Y-direction vibration control mechanism includes: a slide rail (2), a spring (3), a piston rod (4), a box body (5), a cylinder type semi-active damper (11), a limit groove (12), a piezoelectric ceramic (13), a slider (14), and a clamping block (21). The present invention has good vibration reduction effect.

Description

Technical Field

[0001] The present invention relates to the field of general building structures for preventing vibration or shock, and specifically to a two-way controlled tuned liquid column damper and its usage method. Background Art

[0002] Natural disasters such as earthquakes and typhoons can cause huge damage to buildings and infrastructure, resulting in losses 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 performance of structures, enabling them to better withstand the forces of natural disasters. How to ensure better control of the vibration of buildings and infrastructure requires stable operation under multi-hazard coupling; multi-directional vibration control; a vibration control device with adjustable frequency, damping ratio, stiffness and other performances.

[0003] Traditional tuned liquid column dampers are a kind of building structure vibration control device with low cost, simple installation and adjustable frequency. They usually can only control the 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 to stiffness ratio to achieve an ideal vibration control effect; some tuned liquid column dampers with semi-active and active control devices are difficult to ensure the 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 two-way controlled tuned liquid column damper and its usage method.

[0005] The present invention achieves the invention purpose through the following technical solutions:

[0006] A two-way controlled tuned liquid column damper, comprising an infusion pipe, a control system, an X-direction vibration control mechanism, and a Y-direction vibration control mechanism, characterized in that:

[0007] The X-direction vibration control mechanism and the Y-direction vibration control mechanism are connected through the infusion pipe, and the function of the infusion pipe is to adjust the natural vibration frequencies in the X-direction and Y-direction within the plane of the damper;

[0008] 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 meter, a barometer, a solenoid valve, and a pump,

[0009] 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;

[0010] 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;

[0011] 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.

[0012] 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.

[0013] 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;

[0014] 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.

[0015] 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.

[0016] The described two-way controlled tuned liquid column damper is characterized in that:

[0017] The liquid in the box body is selected as water or oil;

[0018] The thickness of the sealing coating is 2 cm to 5 cm;

[0019] The number of electromagnets is 8 to 16.

[0020] The using method of the described two-way controlled tuned liquid column damper is characterized in that it is implemented in sequence according to the following steps:

[0021] The natural vibration frequency of the U-shaped liquid column damper is related to the height of the liquid column inside. When the natural vibration frequency of the U-shaped liquid column damper is consistent with the instantaneous vibration frequency of the structure, it has the best vibration reduction performance in the X direction. Therefore, the control center uses wavelet transform to identify the displacement signal ux(t) of the third displacement gauge arranged in the X direction of the main structure to obtain the vibration frequency of the main structure in the X direction;

[0022] S. X-direction control:

[0023] The control center uses the sloshing of the liquid inside the U-shaped liquid column damper along the X direction in the plane to consume energy to control the vibration of the main structure in the X direction. The specific steps are as follows

[0024] The liquid level gauge arranged 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;

[0025] 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 into the U-shaped liquid column damper through the liquid delivery pipe, so that the vibration frequency of the U-shaped liquid column damper matches the vibration frequency of the main structure;

[0026] If the vibration frequency of the U-shaped liquid column damper in the X direction is less than the vibration frequency of the main structure, the solenoid valve opens, and the pump extracts liquid from the U-shaped liquid column damper through the liquid delivery pipe and pumps it into the box body, so that the vibration frequency of the U-shaped liquid column damper matches the vibration frequency of the main structure;

[0027] The U-shaped liquid column damper adjusts its own vibration frequency in the X direction in real time to improve the vibration control performance in the X direction;

[0028] S. Y-direction control:

[0029] The control center also uses the U-shaped liquid column damper to slide in the Y direction in the plane along the slide rail and jointly acts with the spring, the cylinder-type semi-active damper and the box body to control the vibration of the main structure in the Y direction. The specific steps are as follows:

[0030] The U-shaped liquid column damper moves along the slide rail in the Y direction, driving the cylindrical semi-active damper and the spring, thereby driving the piston rod to move, causing a change in the enclosed volume within the box, altering the hydraulic pressure and air pressure inside the box, and the pressure reacting to the U-shaped liquid column damper to provide a time-varying control force in the Y direction, regulating in real time the restoring force of the tuned U-shaped liquid column damper in the Y direction, that is, regulating in real time the stiffness of the U-shaped liquid column damper in the Y direction, thereby regulating in real time the vibration frequency of the U-shaped liquid column damper in the Y direction. The hydraulic pressure gauge in the liquid inside the box and the air pressure gauge in the gas transmit the hydraulic pressure Pl(t) and air pressure Pg(t) inside the box to the control center in real time. The control center calculates therefrom 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;

[0031] The first displacement gauge provided on the main structure in the Y direction collects the displacement signal uy(t) of the main structure in the Y direction. The control center obtains the vibration frequency of the main structure in the Y direction through wavelet transform. The second displacement gauge provided 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;

[0032] On the premise of ensuring that the volume of the liquid inside 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 the pump to pump the liquid in the two boxes located in the Y-direction movement direction of the U-shaped liquid column damper to the other two boxes, reducing the non-linear restoring force and thus reducing the vibration frequency of the U-shaped liquid column damper in the Y direction;

[0033] 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 movement direction of the U-shaped liquid column damper, increasing the non-linear restoring force and thus increasing the vibration frequency of the U-shaped liquid column damper in the Y direction;

[0034] The method for using the bidirectional control 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 realizing the damping adjustment of the vibration control part in the Y direction. The specific steps are as follows:

[0035] The relative movement between the conductor rod and the electromagnet along the Y direction will generate eddy current electricity in the conductor rod due to the electromagnetic induction effect, causing the conductor rod to heat up, that is, converting kinetic energy into heat energy and dissipating it,

[0036] 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:

[0037] The control center receives the displacement signal uyc(t) of the second displacement gauge installed between the U-shaped liquid column damper and the box body, combines it with the Y-direction displacement response signal uy(t) of the main structure, and obtains the motion phases of the U-shaped liquid column damper and the main structure in the Y direction through Hilbert-Huang transform;

[0038] When the Y-direction motion phase of the U-shaped liquid column damper is the same as that of the main structure in the Y direction (that is, the displacement direction of the U-shaped liquid column damper in the Y direction is the same as that of the main structure in the Y direction), the power-on amount is increased to increase the Y-direction damping of the U-shaped liquid column damper;

[0039] When the Y-direction motion phase of the U-shaped liquid column damper is opposite to that of the main structure in the Y direction (that is, the displacement direction of the U-shaped liquid column damper in the Y direction is opposite to that of the main structure in the Y direction), the power-on amount is decreased to reduce the Y-direction damping of the U-shaped liquid column damper;

[0040] Therefore, the power-on amount of the electromagnet is adjusted in real time through the control center to change its magnetic field strength and eddy current damping force, thereby improving the vibration reduction effect.

[0041] The present invention has the following beneficial effects:

[0042] First, the tuned liquid column damper of the present invention can adjust the two-way vibration frequency and stiffness in real time, and simultaneously control the two-way vibration in the structural plane, and has stronger self-adaptability and vibration control performance compared with the traditional tuned liquid column damper.

[0043] 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 compared with the traditional tuned liquid column damper.

[0044] Third, the tuned liquid column damper of the present invention can control the vibrations in the X and Y directions in the plane, and can improve the safety and comfort of the structure compared with the traditional tuned liquid column damper.

[0045] Fourth, the tuned liquid column damper of the present invention can be realized, and the power supply stability under extreme disasters is ensured compared with the traditional tuned liquid column damper. Description of the Drawings

[0046] Figure 1 is the top view of the present invention,

[0047] Figure 2 is the front view of the present invention,

[0048] Figure 3 is the left view of the present invention,

[0049] Figure 4 is the schematic cross-sectional view of the cylindrical semi-active damper in the present invention,

[0050] Figure 5 This is the control flow chart when the present invention is in use.

[0051] The component names corresponding to the reference numerals are as follows:

[0052] 7: infusion tube

[0053] X-direction vibration control mechanism:

[0054] 1: U-shaped liquid column damper

[0055] 16: pump

[0056] Y-direction vibration control mechanism:

[0057] 2: slide rail

[0058] 3: spring

[0059] 4: piston rod

[0060] 5: box body

[0061] 8: sealing coating

[0062] 11: cylinder-type semi-active damper

[0063] 111: conductor bar

[0064] 112: electromagnet

[0065] 113: cylinder body

[0066] 12: limit groove

[0067] 13: piezoelectric ceramic

[0068] 14: slider

[0069] 21: clamping block

[0070] Control system:

[0071] 15: control center

[0072] 9: first displacement gauge

[0073] 10: second displacement gauge

[0074] 17: third displacement gauge

[0075] 18: liquid level gauge

[0076] 19: hydraulic gauge

[0077] 20: barometer

[0078] 6: solenoid valve Specific implementation manner

[0079] The present invention will be further described below through specific embodiments.

[0080] Embodiment 1

[0081] A two-way controlled tuned liquid column damper includes an infusion pipe 7, a control system, an X-direction vibration control mechanism, and a Y-direction vibration control mechanism, as Figures 1 to 5 shown. The specific structure is as follows:

[0082] The X-direction vibration control mechanism and the Y-direction vibration control mechanism are connected through the infusion pipe 7. The function of the infusion pipe 7 is to adjust the natural vibration frequencies in the X and Y directions within the plane of the damper;

[0083] The control system includes: a control center 15, a first displacement gauge 9, a second displacement gauge 10, a third displacement gauge 17, a liquid level gauge 18, a hydraulic gauge 19, a barometer 20, a solenoid valve 6, and a pump 16.

[0084] The first displacement gauge 9 and the third displacement gauge 17 are respectively arranged in the Y direction and the X direction of the main structure that needs damping and vibration reduction. The second displacement gauge 10 is fixed between the U-shaped liquid column damper 1 and the box body 5. The first displacement gauge 9, the second displacement gauge 10, and the third displacement gauge 17 are all connected to the signal input end of the control system through signal lines. The liquid level gauge 18 is arranged at the bottom of the two vertical pipe sections of the U-shaped liquid column damper 1. The hydraulic gauge 19 is arranged in the liquid in the box body 5. The barometer 20 is arranged in the air above the liquid in the box body 5. The solenoid valve 6 and the pump 16 are both used as actuators and are connected to the signal output end of the control system through signal lines;

[0085] The X-direction vibration control mechanism includes a U-shaped liquid column damper 1. There is a liquid column in the U-shaped liquid column damper 1. A pump 16 is arranged in the liquid column. Energy is consumed by the liquid column sloshing in the X direction within the plane to control the X-direction vibration of the structure;

[0086] The Y-direction vibration control mechanism includes: a slide rail 2, a spring 3, a piston rod 4, a box body 5, a cylinder-type semi-active damper 11, a limit groove 12, a piezoelectric ceramic 13, a slider 14, and a clamping block 21.

[0087] 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;

[0088] 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 112 is 8 to 16.

[0089] 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;

[0090] 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 .

[0091] In this embodiment:

[0092] The liquid in the box 5 is water or oil;

[0093] The thickness of the sealing coating 8 is 2 cm to 5 cm;

[0094] The number of the electromagnets 112 is 8 to 16.

[0095] When this embodiment is used, Figure 5 As shown, follow the steps below:

[0096] The natural frequency of the U-shaped liquid column damper 1 is related to the height of the liquid column inside. 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 vibration reduction performance in the X direction. Therefore, the control center 15 uses wavelet transform to identify the displacement signal ux(t) of the third displacement gauge 17 arranged in the X direction of the main structure to obtain the vibration frequency of the main structure in the X direction;

[0097] S1. X-direction control:

[0098] The control center 15 uses the sloshing of the liquid inside the U-shaped liquid column damper 1 in the X direction within the plane to consume energy to control the vibration of the main structure in the X direction. The specific steps are as follows

[0099] The liquid level gauge 18 arranged at the bottom of the U-shaped liquid column damper 1 measures the height H(t) of the liquid column inside 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;

[0100] 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 infusion pipe 7, so that the vibration frequency of the U-shaped liquid column damper 1 matches the vibration frequency of the main structure;

[0101] 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 infusion pipe 7 and pumps it into the box body 5, so that the vibration frequency of the U-shaped liquid column damper 1 matches the vibration frequency of the main structure;

[0102] The U-shaped liquid column damper 1 adjusts its own vibration frequency in the X direction in real time to improve the vibration control performance in the X direction;

[0103] S2. Y-direction control:

[0104] The control center 15 also uses the U-shaped liquid column damper 1 to slide in the Y direction within the plane along the slide rail 2 and acts together with the spring 3, the cylindrical semi-active damper 11 and the box body 5 to control the vibration of the main structure in the Y direction. The specific steps are as follows:

[0105] The U-shaped liquid column damper 1 moves along the slide rail 2 in the Y direction, driving the cylinder-type semi-active damper 11 and the spring 3, and thus driving the piston rod 4 to move, causing a change in the enclosed volume within the box body 5, changing the hydraulic pressure and air pressure within the box body 5, and the pressure reacting to give a time-varying control force in the Y direction to the U-shaped liquid column damper 1, and regulating in real time the restoring force of the tuned U-shaped liquid column damper 1 in the Y direction, that is, regulating in real time the stiffness of the U-shaped liquid column damper 1 in the Y direction, and thus regulating in real time the vibration frequency of the U-shaped liquid column damper 1 in the Y direction. The hydraulic pressure gauge 19 in the liquid within the box body 5 and the air pressure gauge 20 in the gas transmit in real time the hydraulic pressure Pl(t) and the air pressure Pg(t) within the box body 5 to the control center 15, and the control center 15 calculates therefrom 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;

[0106] The first displacement gauge 9 provided on the main structure in the Y direction collects the displacement signal uy(t) of the main structure in the Y direction, and the control center 15 obtains the vibration frequency of the main structure in the Y direction through wavelet transform; the second displacement gauge 10 provided between the U-shaped liquid column damper 1 and the box body 5 collects the displacement signal uyc(t) of the U-shaped liquid column damper 1 in the Y direction;

[0107] On the premise of ensuring that the volume of the liquid within 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 within the two box bodies 5 in the moving direction of the U-shaped liquid column damper 1 in the Y direction to the other two box bodies 5, reducing the non-linear restoring force and thus reducing the vibration frequency of the U-shaped liquid column damper 1 in the Y direction;

[0108] 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 within the other two box bodies 5 to the two box bodies 5 in the moving direction of the U-shaped liquid column damper 1 in the Y direction, increasing the non-linear restoring force and thus increasing the vibration frequency of the U-shaped liquid column damper 1 in the Y direction.

[0109] The cylinder-type semi-active damper 11 adjusts its own damping by changing the current of the electromagnet 112, thereby realizing the damping adjustment of the vibration control part in the Y direction. The specific steps are as follows:

[0110] The relative movement along the Y direction between the conductor rod 111 and the electromagnet 112 will generate eddy current electricity within the conductor rod 111 due to the electromagnetic induction effect, causing the conductor rod 111 to heat up, that is, converting kinetic energy into heat energy and dissipating it,

[0111] 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:

[0112] The control center 15 receives the displacement signal uyc(t) of the second displacement gauge 10 provided between the U-shaped liquid column damper 1 and the box body 5, combines it with the Y-direction displacement response signal uy(t) of the main structure, and obtains the motion phases of the U-shaped liquid column damper 1 and the main structure in the Y direction through Hilbert-Huang transform;

[0113] When the Y-direction motion phase of the U-shaped liquid column damper 1 is the same as that of the main structure in the Y direction (that is, 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 power-on amount is increased to increase the Y-direction damping of the U-shaped liquid column damper 1;

[0114] When the Y-direction motion phase of the U-shaped liquid column damper 1 is opposite to that of the main structure in the Y direction (that is, 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 power-on amount is decreased to decrease the Y-direction damping of the U-shaped liquid column damper 1;

[0115] Therefore, the power-on amount of the electromagnet 112 is adjusted in real time by the control center 15 to change its magnetic field strength and eddy current damping force, 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 disposed on the slider (14). The piezoelectric ceramic (13) converts the mechanical energy generated by the pressure contact between the slider (14) and the piezoelectric ceramic (13) into electrical energy to achieve 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 cylinder-type semi-active damper (11) through wires to supply power to these four components. One end of the infusion tube (7) is connected to the box body (5), and the other end of the infusion tube (7) is connected to the pump (16) at the bottom of the U-shaped liquid column damper (1).

2. The two-way controlled tuned liquid column damper according to claim 1, characterized in that: The liquid in the box body (5) is selected from water or oil; The thickness of the sealing coating (8) is 2 cm to 5 cm; The number of the electromagnets (112) is 8 to 16.

3. The method for using the bidirectional control tuned liquid column damper according to claim 1 or 2, characterized in that: It is implemented successively according to the following steps: S1. X-direction control: The control center (15) utilizes the sloshing of the liquid inside the U-shaped liquid column damper (1) in the X direction within the plane to consume energy to control the X-direction vibration of the main structure. The specific steps are as follows The liquid level gauge (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 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 infusion tube (7) and pumps it to the box body (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 vibration frequency in the X direction in real time to improve the vibration control performance in the X direction; S2. Y-direction control: The control center (15) also utilizes the sliding of the U-shaped liquid column damper (1) along the slide rail (2) in the Y direction within the plane, acting together with the spring (3), the cylinder-type semi-active damper (11), and the box body (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 cylinder semi-active damper (11) and the spring (3), thereby driving the piston rod (4) to move, causing a change in the enclosed volume within the box body (5), changing the hydraulic pressure and air pressure within the box body (5), and the pressure reacting back to the U-shaped liquid column damper (1) to provide a time-varying control force in the Y direction, and adjusting in real time the restoring force of the tuned U-shaped liquid column damper (1) in the Y direction, that is, adjusting in real time the stiffness of the U-shaped liquid column damper (1) in the Y direction, thereby adjusting in real time the vibration frequency of the U-shaped liquid column damper (1) in the Y direction. The hydraulic pressure gauge (19) in the liquid within the box body (5) and the barometer (20) in the gas transmit the hydraulic pressure Pl(t) and the air pressure Pg(t) within the box body (5) to the control center (15) in real time. The control center (15) thereby 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 gauge (9) provided on the main structure in the Y direction collects the displacement signal uy(t) of the main structure in the Y direction. The control center (15) obtains the vibration frequency of the main structure in the Y direction through wavelet transform; the second displacement gauge (10) provided between the U-shaped liquid column damper (1) and the box body (5) collects the 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 within 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 within the two box bodies (5) in the moving direction of the U-shaped liquid column damper (1) in the Y direction to the other two box bodies (5), reducing the non-linear restoring force and thereby 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 within the other two box bodies (5) to the two box bodies (5) in the moving direction of the U-shaped liquid column damper (1) in the Y direction, increasing the non-linear restoring force and thereby increasing the vibration frequency of the U-shaped liquid column damper (1) in the Y direction.

4. The method for using a tuned liquid column damper with two-way control according to claim 3, characterized in that: At step S2, the cylinder semi-active damper (11) adjusts its own damping by changing the current of the electromagnet (112), thereby realizing the damping adjustment of the vibration control part in the Y direction. The specific steps are as follows: The relative movement between the conductor rod (111) and the electromagnet (112) in the Y direction will generate eddy current electricity within the conductor rod (111) due to the electromagnetic induction effect, causing the conductor rod (111) to heat up, that is, converting kinetic energy into heat energy for dissipation; The control center (15) receives the displacement signal uyc(t) of the second displacement gauge (10) provided between the U-shaped liquid column damper (1) and the box body (5), combines it with the displacement response signal uy(t) of the main structure in the Y direction, and obtains the motion phases of the U-shaped liquid column damper (1) and the main structure in the Y direction through Hilbert-Huang transform; When the Y-direction movement phase of the U-shaped liquid column damper (1) is the same as the Y-direction movement phase of the main structure, increase the power consumption to increase the Y-direction damping of the U-shaped liquid column damper (1); When the Y-direction movement phase of the U-shaped liquid column damper (1) is opposite to the Y-direction movement phase of the main structure, decrease the power consumption to decrease the Y-direction damping of the U-shaped liquid column damper (1).

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