A pendulum type eddy current tuned mass damper and method for realizing structural vibration reduction

Abstract

The invention discloses a pendulum eddy current tuned mass damper and a method for achieving structure vibration reduction and relates to the technical field of structure vibration reduction. Two bearings are fixed to the bottom of a top plate of a damper body, and the inner rings of the two bearings are connected through a horizontal rotating shaft. An oscillating bar is vertically arranged below the rotating shaft, the top of the oscillating bar is connected with the rotating shaft, a mass block is welded to the bottom of the oscillating bar, a plurality of permanent magnets are embedded in the two side faces, facing a front plate and a rear plate, of the mass block, and eddy current plates are arranged at the parts, corresponding to the mass block, of the front plate and the rear plate. Springs capable of vertically moving along the oscillating bar are arranged on the left side and the right side of the oscillating bar, and stepless regulation of the frequency of the damper can be achieved by regulating the distance between the springs and the rotating shaft. According to the damper, the moving state of the mass block is stable, the energy consumption mode is reliable, the frequency regulating range is large, and the damper can adapt to medium and high natural vibration frequency.

Description

technical field [0001] The invention relates to the technical field of structural vibration reduction, in particular to a pendulum-type eddy current tuned mass damper and a method for realizing structural vibration reduction. Background technique [0002] With the rapid development of modern construction technology, the height of new buildings and the span of bridges are getting larger and larger. The application of new structures and new materials leads to an increase in the slenderness ratio of the building and a decrease in its own damping, which in turn leads to poor structural stability. In particular, towering and slender building structures are prone to vibration under the excitation of external loads such as earthquakes, wind, and driving, which will lead to structural damage or fatigue damage, thereby affecting the safety and service life of the structure. The tuned mass damper (Tuned MassDamper-TMD) has been widely used because it can effectively control the vibra...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this damper is that it uses friction plates to dissipate energy, which is detrimental to the stability and durability of the damper, and the damper places the tension spring on the rigid rod at the bottom of the mass, and fine-tunes the position of the spring action point To adjust the frequency of the damper, the adjustable range is small, and the precise and continuous parameter adjustment function cannot be realized

However, the disadvantage of this damper is that: due to the use of flexible slings to drive the movement of the mass block, it is difficult to control the dynamic stability of the mass block, and the stability and durability requirements of the damper cannot be met; in addition, the damper passes Adjusting the vibration frequency of the mass block by adjusting the length of the sling makes the frequency adjustable range very small, which is only suitable for the lower natural vibration frequency of the damper, and the application range is not wide

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