Tuned liquid damper with three-way self-adaptive control

By combining a mass damper and a liquid damper, a three-dimensional adaptive control tuned liquid mass damper was designed, which adjusts the frequency, stiffness and damping in real time. This solves the problem that traditional dampers are difficult to control the vibration of large-span and high-rise buildings under varying external excitations, and achieves better vibration control effect.

CN118257362BActive Publication Date: 2025-12-16TONGJI UNIV
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Patent Information

Application Number
CN202410410521.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-04-07
Publication Date
2025-12-16
Estimated Expiration
2044-04-07

AI Technical Summary

Technical Problem

Traditional tuned mass and tuned liquid dampers lack adaptability under varying external excitations, making it difficult to effectively control the vibrations of large-span, high-rise buildings in three directions, especially the resonance problems caused by human-induced vibrations and wind-induced vibrations.

Method used

A three-dimensional adaptive control tuned liquid mass damper was designed. By combining a mass damper and a liquid damper, and utilizing a control unit, a stepping system, a connection system, and a damping system, the frequency, stiffness, and damping of the damper can be adjusted in real time. The damper includes components such as a top water tank, a bottom water tank, silicone oil, an iron rod, and an elliptical insert plate to achieve three-dimensional vibration control.

Benefits of technology

It achieves better vibration control performance in three directions for large-span, high-rise buildings, with a wider vibration reduction bandwidth and better adaptability, and can adjust the triaxial damping and stiffness of the damper in real time.

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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.
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