Distributed bridge vortex-induced vibration suppression method and system based on perception data fusion

Abstract

The invention discloses a distributed bridge vortex-induced vibration suppression method and system based on perception data fusion, the system comprises vortex-induced vibration suppression devices distributed in a plurality of intervals on a bridge, and each vortex-induced vibration suppression device comprises a bottom spoiler, a first rotation module, a stress detection module, a vibration detection module, a wind speed detection module and a control module; each bottom spoiler is mounted on the lower surface of the bridge through the corresponding first rotating module; a stress detection module is mounted on each bottom spoiler and is used for collecting stress data on the corresponding bottom spoiler; the vibration detection modules are used for collecting vibration data of the vibration detection module bridge floor; the wind speed detection modules are used for collecting wind speed and wind direction of the wind speed detection module; and the control modules are used for controlling the first rotating module corresponding to each bottom spoiler to rotate according to the vibration data, the wind speed, the wind direction and stress data on each bottom spoiler so as to adjust the first included angle between each bottom spoiler and the wind direction.

Description

technical field [0001] The present application relates to the technical field of intelligent monitoring, in particular to a distributed bridge eddy vibration suppression method and system based on sensory data fusion. Background technique [0002] Vortex vibration, namely vortex-induced vibration, is a wind-induced vibration phenomenon of long-span bridges under low wind speed. From the point of view of fluid, any non-streamlined object will alternately generate vortices on both sides of the object at a certain constant flow rate, leaving the surface of the structure, similar to the Karman vortex street effect. [0003] Long-span suspension bridges have vortex vibrations at low wind speeds, and the vibration amplitudes are small and difficult to detect. Only under special conditions will large amplitudes occur. Although vortex vibration will not cause catastrophic damage to bridges like flutter, frequent and continuous vortex vibration will cause fatigue damage to bridge co...

AI Technical Summary

Problems solved by technology

However, despite the windproof design in the design stage, since the bridge load will change with the traffic flow during operation, the wind speed and direction at the bridge site will also change, and the bridge structure will also undergo slight changes, which will cause bridge fundamental frequency changes, so the bridge may still suffer from severe eddy vibration

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