Bridge shock excitation and vibration reduction integrated device

Abstract

A bridge shock excitation and vibration reduction integrated device comprises a monitoring assembly, a vibration reduction and shock excitation assembly and a control assembly, a shock excitation component and a vibration reduction component are integrated into the same device, and the device can be arranged on a bridge floor and conduct damping type mechanical vibration reduction on a bridge when the bridge generates wind-induced vibration. The dynamic characteristic test can be directly carried out on the bridge structure under the condition of large-amplitude excitation vibration after wind-induced vibration, and other independent vibration reduction and excitation devices do not need to be mounted on the bridge again, so that the time and the cost for carrying out the dynamic characteristic test on the bridge structure are effectively saved; and the emergency efficiency and the management and control capability under the sudden vibration condition of the bridge are improved.

Description

【Technical field】 [0001] The invention relates to the field of bridge structure control and monitoring, in particular to a bridge excitation and vibration reduction integrated device. 【Background technique】 [0002] Wind-induced vibration is a key dynamic problem of long-span flexible bridges, which mainly includes vortex-induced vibration, flutter, buffeting and other vibration forms. Long-term wind-induced vibration will cause fatigue damage such as cracks in the bridge structure during the service period, and will directly affect the driving safety and comfort of the bridge. [0003] At present, bridge vibration reduction measures mainly include pneumatic control measures, structural measures and mechanical vibration reduction measures. Among them, mechanical vibration reduction measures consume wind-induced vibration energy and control wind-induced vibration amplitude by setting tuned mass dampers, which can effectively reduce wind-induced vibration such as vortex induc...

AI Technical Summary

Problems solved by technology

The existing adjustable mass damper and the vibration exciter perform vibration reduction and vibration excitation separately, which cannot realize the integrated operation of vibration reduction and vibration excitation

The traditional bridge structure damage dynamic detection requires the arrangement of the vibrator after the wind-induced vibration of the bridge structure. This process not only takes a long time but also requires repeated installation and disassembly, which increases the labor cost and time-consuming of the dynamic characteristic test of the bridge structure. And reduce the accuracy and reliability of the dynamic characteristic test

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