A pendulum type eddy current tuned mass damper vibration reduction control device

Abstract

A pendulous eddy current tuned mass damper vibration reduction control device comprises a support and 1-4 mass blocks hung at the top end of the support through swing ropes, and an eddy current damping system and a guide mechanism are installed between each mass block and the support; each eddy current damping system comprises a permanent magnet and a conductor plate, the conductor plates are installed on the side faces of the mass blocks, and the permanent magnets are installed on the inner sides, corresponding to the conductor plates, of the support; the guide mechanisms are symmetrically installed on the two sides of the mass blocks in the swing direction, and each guide mechanism comprises guide plates fixedly installed on the two sides of the corresponding mass block and guide bearings installed on the inner sides of the support and making rolling contact with the corresponding guide plates. The support is provided with a pendulum length adjustment component and movable rolling wheels, the four corners of the pendulum length adjustment component are movably connected with the support, and a locking mechanism for fixing the swing ropes is arranged in a frame which is the pendulum length adjustment component. The control device is convenient to move in whole, frequency and damping coefficients are convenient to adjust, frictional damping is low, sensitivity of the mass blocks is high, the damping ratio of eddy currents can be freely adjusted within the range from 1% to 20%, and no additional rigidity is generated.

Description

technical field [0001] The invention relates to the technical field of vibration reduction and isolation, in particular to a pendulum-type tuned mass damper vibration reduction control device used for wind resistance and vibration reduction of towering and soft structures such as building structures and bridges at low frequencies. Background technique [0002] With the development of the national economy and the needs of transportation, the development of bridges tends to be more and more soft in overall structure to achieve the purpose of large spans, especially cable-stayed bridges, although the bridge has sufficient wind resistance in the completed state However, during the construction period of the bridge, especially under the condition of cantilever construction, the cantilever end of the girder body and the main tower are softer than when the bridge is closed. In the disaster environment such as strong earthquakes and hurricanes, damage or even destruction may occur. ...

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide a pendulum for the problems of high production cost, no moving function, easy damage of structural parts, difficult adjustment of damping and additional stiffness in existing large-scale TMD technology in structural low-frequency vibration control. Type eddy current tuned mass damper damping control device to overcome the above-mentioned deficiencies in the prior art

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