Damping ratio adjustable tuning quality damper

Abstract

The invention specifically relates to a mass tuned vibration reducer used for regulating the subsidence ratio of the vibration of the related structures. The mass tuned vibration reducer comprises a mass block, a spring, a damper and a base, and is characterized in that the damper is an adhesion-type damper formed by a damping cylinder, adhesive damping fluid and a piston, wherein, the piston and the adhesive damping fluid are arranged in the damping cylinder, and at least part of the piston is immerged into the adhesive damping fluid. The mass tuned vibration reducer adopts the adhesion-type damper formed by the adhesive damping fluid and the piston and can provide three dimensional damping, so as to effectively prevent side tumbling and ensure the vibration reducer realizes smooth actions; vibration mass is not needed to be provided with a special guide device, so that the mass tuned vibration reducer has reliable work and higher cost performance, and basically needs no maintenance. Meanwhile, the mass tuned vibration reducer realizes the aim of regulating the natural frequency and the subsidence ratio at any time, thus better exerting the vibration absorption performance of the mass tuned vibration reducer, ensuring stableness and safety of the pedestrians and vehicles on the large-span bridge and the thin and high building, contributing to prolonging the service lives of the thin and high building and the bridge, and having remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction of civil engineering structures, and in particular relates to a tuned mass damper for controlling the vibration of airport boarding bridges, long-span pedestrian bridges, port trestles, high-rise buildings and related structures. Background technique [0002] With the development of urban construction, the urban transportation network is becoming more and more developed. Various long-span airport boarding bridges, pedestrian bridges, port trestles and other bridge structures have been widely used, bringing great convenience to people's travel. . However, although the strength and stiffness of this type of bridge are relatively easy to meet the design requirements, the frequency of its vertical vibration is generally relatively low (for example, the vertical frequency of a long-span pedestrian bridge is usually only about 2 Hz). Resonance is prone to occur under the action of dynamic l...

AI Technical Summary

Problems solved by technology

However, although the existing tuned mass damper can adjust the natural frequency at any time, most of its dampers are small-hole throttling or hydraulic oil piston-type structures, and the damping ratio of the damper is constant. Replace the damper. In addition, the seal of the damper is damaged quickly under the condition of reciprocating vibration. After the seal is damaged, the pressure difference of the damping chamber cannot maintain the original design, and the damping force drops, so it must be replaced. The price of the damper is very high, and the solution is to rely on replacement. Such problems are bound to cause great waste

In addition, the horizontal stiffness of existing tuned mass dampers is generally poor, and they are prone to lateral swaying. Therefore, a guide device is required to realize vertical vibration. mass damper

Once the cooperation between the guide device and the vibrating part is not smooth, the performance of this type of tuned mass damper will be greatly affected, so regular inspection and maintenance must be performed, which is very inconvenient

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