MR阻尼器在抑制斜拉桥拉索风雨振中的应用研究

Application of MR Dampers in Rain-Wind-induced Vibration Control of Cables of Cable-stayed Bridges

介绍了磁流变 ( MR)智能型阻尼器的原理 ,通过在我国洞庭湖大桥拉索振动控制的试验 ,得出在安装 MR阻尼器后拉索等效模态阻尼比的优化值 ,从而可调节 MR阻尼器外接电压值实现对拉索振动的优化控制 ,为探索更有效的抑制拉索振动方法提供了科学依据 .现场实测的风雨振现象 ,也证实了

The principle of MR smart dampers are introduced simply. Through a field testing of a stay cable attached with Magneto-rheological(MR) dampers implemented on Dongting Lake Bridge, the modal damping ratios of cable under the different voltage applied to MR dampers are obtained,and the optimal control for cable vibration can be realized. The actual efficiency of mitigating vibration of MR dampers to rain-wind-induced vibration has been verified when the serious rain-wind induced vibrations occurred. These provide some scientific basis for mitigating vibration of cable effectively.