Tuned liquid damper with three-way self-adaptive control

Abstract

The application provides a three-way self-adaptive control tuned liquid damper, which comprises a liquid mass damper, a damping system, a stepping system, a connecting system and a control unit; the liquid mass damper is composed of a top water tank, a mass block and a bottom water tank; the damping system is composed of silicone oil, an iron bar and an elliptical plugboard; the stepping system is composed of a stepping motor, a stepping push-pull rod, a telescopic rod frame, a stepping telescopic rod and an electric rotary table; the connecting system is composed of a water pipe, a water pump, an electromagnetic valve and a shape memory alloy spring; the control unit can control the electric rotary table to change the angle of the elliptical plugboard, the stepping system and the connecting system to adjust the frequency, stiffness and damping of the damper in real time according to the signals of the accelerometer and the displacement meter on the structure; and the application can realize the vibration control in the Z direction, the X direction and the Y direction in the plane, and has stronger vibration control performance and structural use comfort.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of civil engineering and vibration control technology, and particularly relates to a three-direction self-adaptive control tuned liquid mass damper. BACKGROUND

[0002] With the improvement of design and construction level, large-span and high-rise building structures are more and more common in cities. However, due to the low structural damping ratio, the structure is easy to be excited by external excitation and resonance, which can cause comfort and safety problems. The causes of resonance are usually human-induced vibration and wind-induced vibration, and the two usually act on the building structure at the same time in most cases, resulting in vibration of the building structure in three directions. Therefore, a damper capable of three-direction control is needed to realize vibration control.

[0003] Tuned mass damper is a traditional and popular vibration reduction device, which is used to improve the service performance of the structure. When well tuned, the tuned mass damper can effectively control vibration and dissipate vibration energy through its damping element, and has a wide application in human-induced vibration control. However, for variable external excitation, the traditional tuned mass damper lacks good self-adaptability.

[0004] Tuned liquid damper is also a practical transverse vibration control device, but it cannot control the vertical vibration of the structure. Tuned liquid damper utilizes the side force generated by the liquid in the fixed tank during the sloshing process to provide damping effect. However, like the tuned mass damper, the traditional tuned liquid damper also lacks good self-adaptability. SUMMARY

[0005] The present application aims to overcome the shortcomings in the prior art and provide a three-direction self-adaptive control tuned liquid mass damper, which can adjust its three-direction damping, frequency and Z-direction stiffness in real time, and has better three-direction vibration control performance compared with the traditional tuned liquid damper and tuned mass damper.

[0006] The present application is achieved by the following technical solutions:

[0007] A three-way self-adaptive control tuned liquid mass damper, the damper device comprising: a control unit; a top water tank, a mass block, a bottom water tank, the mass block comprising a top mass block and a bottom mass block, the mass block is internally provided with a cuboid recess, the top water tank and the bottom water tank are respectively placed in the corresponding cuboid recess of the top mass block and the bottom mass block; the center of the bottom mass block is provided with a cylindrical recess, silicon oil is stored in the cylindrical recess, one end of an iron rod is inserted into the silicon oil, the other end of the iron rod extends vertically upward above the top mass block and is fixed to a step push-pull rod above by a bolt connection, the step push-pull rod is controlled to act by a step motor; a water pipe connects the top water tank and the bottom water tank, the bottom water tank realizes communication with the external water supply and drainage system by using the water pipe, a water pump and a solenoid valve; shape memory alloy springs are respectively and symmetrically placed at the four corners of the damper device, one end of the shape memory alloy spring is fixed to the bottom of the top mass block by clamping connection, and the other end is fixed to the top of the bottom mass block by clamping connection; the top end of an electric rotary table is fixed to the bottom of the top mass block by a bolt connection, the bottom end of the electric rotary table is fixed to a telescopic rod holder by a bolt connection, one end of a step telescopic rod is fixed to the telescopic rod holder by a bolt connection, the other end of the step telescopic rod extends vertically downward and is connected with a clamping device at the end, an oval plugboard is connected above the bottom mass block by the clamping device, and the step telescopic rod is controlled to act by the step motor.

[0008] Wherein: the top water tank, mass block and bottom water tank constitute the liquid mass damper of the damper device, the top water tank and the top mass block can be used as a mass damper to control Z-direction vibration, and the bottom water tank can be used as a liquid damper to control X-direction and Y-direction vibration in the plane; the silicon oil, iron rod and oval plugboard constitute the damping system of the damper device, the contact length of the iron rod and the silicon oil is changed to change the Z-direction damping of the mass damper, and different sizes of the oval plugboard are selected to realize the adjustment of the frequency and damping of the liquid damper in the X-direction and Y-direction in the plane; the step motor, step push-pull rod, telescopic rod holder, step telescopic rod and electric rotary table constitute the step system of the damper device, the step motor controls the lifting of the iron rod and the oval plugboard through the step push-pull rod and the step telescopic rod respectively, thereby realizing real-time adjustment of three-way damping; the water pipe, water pump, solenoid valve and shape memory alloy spring constitute the connection system of the damper device, the water pump and the solenoid valve adjust the liquid level in the water tank and the liquid mass in the top water tank respectively to realize real-time control of three-way variable frequency and variable mass of the damper.

[0009] The control unit controls the liquid mass damper, damping system, stepping system, and connecting system of the damper device to achieve real-time adjustment of the damper frequency, stiffness, and damping according to the signals of the structural accelerometer and displacement meter.

[0010] Specifically, the control unit selects different sizes of the elliptical insert plate according to the signals of the structural accelerometer and displacement meter and controls the electric rotary table to change the angle of the elliptical insert plate to achieve real-time adjustment of the X and Y direction frequency and damping of the liquid damper.

[0011] Specifically, the control unit changes the temperature of the shape memory alloy spring to achieve real-time adjustment of the Z direction stiffness of the mass damper.

[0012] Specifically, the control unit controls the length of the stepping push-pull rod to achieve real-time adjustment of the Z direction damping of the mass damper.

[0013] Specifically, the control unit controls the water pump and the electromagnetic valve to adjust the liquid level in the water tank and the liquid mass in the top water tank to achieve real-time control of the three-way variable frequency and variable mass of the damper, thereby achieving real-time adjustment of the three-way mass and frequency of the damper.

[0014] Preferably, the adjustable length range of the stepping push-pull rod is 0-3 m.

[0015] Preferably, the adjustable length range of the stepping push-pull rod is 0-3 m.

[0016] Preferably, the volume range of the silicone oil is 1 / 2-3 / 4 of the volume of the central groove of the bottom mass.

[0017] Preferably, the number of elliptical insert plates is 3-5.

[0018] The three-way self-adaptive control tuned liquid mass damper provided by the application has the advantages that the top water tank and the top mass block can be used as a mass damper to control Z-direction vibration, and the bottom water tank can be used as a liquid damper to control X-direction and Y-direction vibration in the plane; the length of the contact between the iron rod and the silicon oil can be changed to change the damping of the mass damper, different sizes of the elliptical plug plate can be selected to realize the adjustment of the frequency and damping of the liquid damper in the X-direction and Y-direction in the plane; the stepping motor can drive the stepping push-pull rod and the stepping telescopic rod to control the lifting of the iron rod and the elliptical plug plate, respectively, so as to realize real-time adjustment of three-way damping; the water pump and the electromagnetic valve can adjust the liquid level in the water tank and the mass of the top water tank, respectively, to realize real-time control of three-way variable frequency and variable mass; and the control unit can control the electric rotary table to change the angle of the elliptical plug plate according to the signals of the accelerometers and displacement meters on the structure, and the stepping system and the connecting system can be used to realize real-time adjustment of the frequency, stiffness and damping of the damper.

[0019] Due to the above scheme, the following beneficial effects are achieved:

[0020] Firstly, the tuned liquid mass damper combines the mass damper and the liquid damper, can control three-way vibration, and has better vibration control performance than the traditional damper.

[0021] Secondly, the tuned liquid mass damper can adjust the stiffness, mass and damping of the mass damper in real time, and has a wider vibration reduction frequency width than the traditional mass damper.

[0022] Thirdly, the tuned liquid mass damper can adjust the damping ratio of the liquid damper in the X-direction and Y-direction in the plane in real time, and has better vibration control effect than the traditional liquid damper. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of the three-way self-adaptive control tuned liquid mass damper of the application.

[0024] Figure 2 FIG. 2 is a top view of the three-way self-adaptive control tuned liquid mass damper of the application.

[0025] Figure 3 FIG. 3 is a left view of the three-way self-adaptive control tuned liquid mass damper of the application.

[0026] Figure 4 FIG. 4 is an intelligent control diagram of the three-way self-adaptive control tuned liquid mass damper of the application.

[0027] Fig. 1: 1 - control unit, 2 - top water tank, 3 - electromagnetic valve, 4 - water pipe, 5 - step push-pull rod, 6 - step motor, 7 - iron rod, 8 - mass block, 81 - top mass block, 82 - bottom mass block, 9 - shape memory alloy spring, 10 - silicone oil, 11 - water pump, 12 - electric rotary table, 13 - telescopic rod holder, 14 - step telescopic rod, 15 - clamping device, 16 - oval plugboard, 17 - bottom water tank. DETAILED DESCRIPTION

[0028] The present application is further described below in conjunction with the accompanying drawings and examples, but the examples are not intended to limit the present application, and any similar structure and similar changes thereof shall be included in the protection scope of the present application.

[0029] As shown in Figure 1 The three-way self-adaptive control tuned liquid mass damper of the present application includes: a liquid mass damper, a damping system, a step system, a connecting system and a control unit.

[0030] Liquid mass damper

[0031] The liquid mass damper includes: a top water tank 2, a mass block 8 and a bottom water tank 17, both the top water tank 2 and the bottom water tank 17 are placed in the cuboid recess inside the mass block 8. The mass block 8 includes a top mass block 81 and a bottom mass block 82.

[0032] The top water tank 2 and the top mass block 81 can be used as a mass damper to control Z-direction vibration, and the bottom water tank 17 can be used as a liquid damper to control X-direction and Y-direction vibration in the plane.

[0033] Damping system

[0034] The damping system includes: silicone oil 10, iron rod 7, oval plugboard 16, one end of the iron rod 7 is fixed to the step push-pull rod 5 through a bolt connection, the other end is inserted into the silicone oil 10, and the silicone oil 10 is stored in the center cylindrical recess of the bottom mass block 82.

[0035] The step push-pull rod 5 changes the Z-direction damping of the mass damper by changing the contact length of the iron rod 7 and the silicone oil 10.

[0036] Among them, the volume range of the silicone oil 10 is 1 / 2~3 / 4 of the volume of the center recess of the bottom mass block 82, and the number of oval plugboards 16 is 3~5.

[0037] Stepping system

[0038] The stepping system comprises a stepping motor 6, a stepping push-pull rod 5, a telescopic rod holder 13, a stepping telescopic rod 14 and an electric rotary table 12, one end of the stepping telescopic rod 14 is fixed to the telescopic rod holder 13 through bolt connection, the other end is connected to the clamping device 15 through bolt connection, the top end of the electric rotary table 12 is fixed to the bottom of the top mass block 81 through bolt connection, and the bottom end is fixed to the telescopic rod holder 13 through bolt connection.

[0039] The adjustable length range of the stepping push-pull rod 5 and the stepping telescopic rod 14 is 0-3 m.

[0040] Connection system

[0041] The connecting system comprises a water pipe 4, a water pump 11, an electromagnetic valve 3 and a shape memory alloy spring 9, the water pipe 4 is connected with the top water tank 2 and the bottom water tank 17, the bottom water tank 17 is connected with the external water supply and drainage system through the water pipe 4, the water pump 11 and the electromagnetic valve 3, one end of the shape memory alloy spring 9 is fixed to the bottom of the top mass block 81 through clamping connection, the other end is also fixed to the top of the bottom mass block 82 through clamping connection, and is symmetrically arranged at four corners of the damper device.

[0042] The water pump 11 and the electromagnetic valve 3 can adjust the liquid level in the water tank and the liquid mass in the top water tank 2, so as to realize real-time control of three-way variable frequency and variable mass of the damper.

[0043] Control unit

[0044] The control unit 1 can select different sizes of the elliptical insert plate 16 according to the accelerometer and displacement meter signals on the structure, control the electric rotary table 12 to change the angle of the elliptical insert plate 16, so as to realize real-time adjustment of the frequency and damping of the bottom liquid damper in the X direction and the Y direction.

[0045] The control unit 1 can change the temperature of the shape memory alloy spring 9, so as to realize real-time adjustment of the Z direction stiffness of the top mass damper.

[0046] The control unit 1 can control the length of the stepping push-pull rod 5, so as to realize real-time adjustment of the Z direction damping of the top mass damper.

[0047] The control unit 1 can control the opening and closing of the water pump 11 and the electromagnetic valve 3, so as to realize real-time adjustment of the three-way mass and frequency of the damper.

[0048] The specific built-in algorithm involved in the application does not belong to the technical problems to be solved by the application, and is prior art known by those skilled in the art, and will not be described here.

[0049] The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application. Any modification or change made by any person skilled in the art according to the technical content disclosed above should be regarded as an equivalent effective embodiment, and belongs to the scope of protection of the technical scheme of the present application.

Claims

1. A three-dimensional adaptive control tuned liquid mass damper, characterized in that, The damper device includes: Control unit (1); The top water tank (2), the mass block (8), and the bottom water tank (17) are provided. The mass block (8) includes a top mass block (81) and a bottom mass block (82). The inside of the mass block (8) is provided with a cuboid groove. The top water tank (2) and the bottom water tank (17) are respectively placed in the corresponding cuboid grooves of the top mass block (81) and the bottom mass block (82). The bottom mass block (82) has a cylindrical groove at its center, and silicone oil (10) is stored in the cylindrical groove. One end of the iron rod (7) is inserted into the silicone oil (10), and the other end of the iron rod (7) extends vertically upward to the top mass block (81) and is fixed to the stepping push rod (5) located above by bolts. The stepping push rod (5) is controlled by a stepper motor (6). The water pipe (4) connects the top water tank (2) and the bottom water tank (17). The bottom water tank (17) is connected to the external water supply and drainage system through the water pipe (4), the water pump (11) and the solenoid valve (3). Shape memory alloy springs (9) are symmetrically placed at the four corners of the damper device. One end of the shape memory alloy spring (9) is fixed to the bottom of the top mass block (81) by snap-fit ​​connection, and the other end is fixed to the top of the bottom mass block (82) by snap-fit ​​connection. The top of the electric rotary table (12) is fixed to the bottom of the top mass block (81) by bolts, and the bottom of the electric rotary table (12) is fixed to the telescopic rod frame (13) by bolts. One end of the stepping telescopic rod (14) is fixed to the telescopic rod frame (13) by bolts. The other end of the stepping telescopic rod (14) extends vertically downward and is connected to a clamping device (15). The elliptical insert plate (16) is connected above the bottom mass block (82) through the clamping device (15). The stepping telescopic rod (14) is controlled by the stepper motor (6). in: The top water tank (2), the mass block (8) and the bottom water tank (17) constitute the liquid mass damper of the damper device. The top water tank (2) and the top mass block (81) as a whole can be used as a mass damper to control vibration in the Z direction. The bottom water tank (17) can be used as a liquid damper to control vibration in the X and Y directions in the plane. The silicone oil (10), iron rod (7) and elliptical insert (16) constitute the damping system of the damper device. The Z-direction damping of the mass damper can be changed by changing the contact length between the iron rod (7) and the silicone oil (10). The frequency and damping in the X and Y directions of the liquid damper can be adjusted by selecting elliptical inserts (16) of different sizes. The stepper motor (6), stepper push-pull rod (5), telescopic rod frame (13), stepper telescopic rod (14) and electric rotary table (12) constitute the stepping system of the damper device. The stepper motor (6) drives the stepper push-pull rod (5) and the stepper telescopic rod (14) to control the lifting and lowering of the iron rod (7) and the elliptical insert plate (16) respectively, thereby realizing the real-time adjustment of three-dimensional damping. The water pipe (4), water pump (11), solenoid valve (3) and shape memory alloy spring (9) form the connection system of the damper device. The water pump (11) and the solenoid valve (3) adjust the liquid level in the water tank and the liquid mass in the top water tank (2) to realize the real-time control of the damper's three-way variable frequency and variable mass respectively. The control unit (1) uses a built-in algorithm to control the liquid mass damper, damping system, stepping system and connection system of the damper device to work together based on the accelerometer and displacement meter signals on the structure, thereby adjusting the frequency, stiffness and damping of the damper in real time.

2. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The control unit (1) selects elliptical inserts (16) of different sizes based on the accelerometer and displacement meter signals on the structure and controls the electric rotary table (12) to change the angle of the elliptical inserts (16) so as to realize the real-time adjustment of frequency and damping in the X and Y directions in the plane of the liquid damper.

3. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The control unit (1) changes the temperature of the shape memory alloy spring (9) to achieve real-time adjustment of the Z-direction stiffness of the mass damper.

4. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The control unit (1) controls the length of the stepping push-pull rod (5) to achieve real-time adjustment of the Z-direction damping of the mass damper.

5. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The control unit (1) controls the switching of the water pump (11) and the solenoid valve (3). By adjusting the liquid level in the water tank and the liquid mass in the top water tank (2), the real-time control of the three-dimensional variable frequency and variable mass of the damper is realized, thereby realizing the real-time adjustment of the three-dimensional mass and frequency of the damper.

6. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The adjustable length range of the step-type push-pull rod (5) is 0~3 m.

7. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The adjustable length range of the step-type telescopic rod (14) is 0~3 m.

8. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The volume of the silicone oil (10) is 1 / 2 to 3 / 4 of the volume of the central groove of the bottom mass block (82).

9. The triaxial adaptive control tuned liquid mass damper as described in claim 1, characterized in that: The number of the elliptical inserts (16) is 3 to 5.

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