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A platform for research: civil engineering, architecture and urbanism
Large-span split type three-box girder structure wind-induced vibration active control system
The invention discloses an active control system for wind-induced vibration of a large-span split type three-box girder structure. The active control system is used for controlling the large-amplitude vortex vibration phenomenon of a large-span split type three-box girder. Comprising an air suction pump, an air blowing pump, a real-time flow meter, a hot-wire anemometer and a main control computer, slits are arranged at flow characteristic points on the surface of a box girder, air suction control is set at a flow separation point, and air blowing control is set at a laminar shear layer roll starting point and a vortex collision point; therefore, the control effects of restraining flow separation on the surfaces of the box girders, preventing surface shear layers from being rolled up and interacting with each other and preventing vortexes from colliding with the box girders are achieved, streaming of the integral structure of the split type three-box girder is more stable, high practicability is achieved, and the control effect is obvious.
本发明公开一种大跨度分体式三箱梁结构风致振动主动控制系统，对大跨度分体式三箱梁的大幅值涡振现象进行控制。包括吸气泵、吹气泵、实时流量计、热线风速仪和主控计算机，通过在箱梁表面流动特征点处布置狭缝，其中流动分离点处设定为吸气控制，层流剪切层卷起点以及旋涡碰撞点处设定为吹气控制，从而达到抑制箱梁表面流动分离、防止表面剪切层卷起并相互作用以及避免旋涡与箱梁发生碰撞的控制效果，使得分体式三箱梁整体结构绕流更加稳定，具有较高的可实行性，控制效果明显。
Large-span split type three-box girder structure wind-induced vibration active control system
The invention discloses an active control system for wind-induced vibration of a large-span split type three-box girder structure. The active control system is used for controlling the large-amplitude vortex vibration phenomenon of a large-span split type three-box girder. Comprising an air suction pump, an air blowing pump, a real-time flow meter, a hot-wire anemometer and a main control computer, slits are arranged at flow characteristic points on the surface of a box girder, air suction control is set at a flow separation point, and air blowing control is set at a laminar shear layer roll starting point and a vortex collision point; therefore, the control effects of restraining flow separation on the surfaces of the box girders, preventing surface shear layers from being rolled up and interacting with each other and preventing vortexes from colliding with the box girders are achieved, streaming of the integral structure of the split type three-box girder is more stable, high practicability is achieved, and the control effect is obvious.
本发明公开一种大跨度分体式三箱梁结构风致振动主动控制系统，对大跨度分体式三箱梁的大幅值涡振现象进行控制。包括吸气泵、吹气泵、实时流量计、热线风速仪和主控计算机，通过在箱梁表面流动特征点处布置狭缝，其中流动分离点处设定为吸气控制，层流剪切层卷起点以及旋涡碰撞点处设定为吹气控制，从而达到抑制箱梁表面流动分离、防止表面剪切层卷起并相互作用以及避免旋涡与箱梁发生碰撞的控制效果，使得分体式三箱梁整体结构绕流更加稳定，具有较高的可实行性，控制效果明显。
Large-span split type three-box girder structure wind-induced vibration active control system
一种大跨度分体式三箱梁结构风致振动主动控制系统
GAO DONGLAI (author) / RAN YIZE (author) / CHEN WENLI (author) / LI HUI (author)
2023-11-17
Patent
Electronic Resource
Chinese
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