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通过对岳阳洞庭湖大桥拉索风雨振进行了现场实测所获得的拉索振动的加速度时程记录及实时的风场与雨量记录.利用拉索的振动方程与数值计算方法对拉索的振动特征进行了研究.分析结果表明:风雨振是拉索发生的一种大幅、低频振动.拉索风雨振存在一个最低临界风速,并且存在一个风向敏感区.图7,表1,参8.
Through the on-the-spot measurement of wind and rain vibration of the cables of Yueyang Dongting Lake Bridge, the acceleration time records of cable vibration and the real-time wind and rainfall records were obtained. The results show that the wind-rain vibration is a kind of large-scale and low-frequency vibration of the cable, and the wind and rain of the cable have a minimum critical wind speed, and there is a wind direction sensitive area.