Coupled wake flutter causes vortex induced vibrations of a flexible cable

摘要：

　　In the present study,the multi-mode behaviors and the excitation mechanism of vortex induced vibrations(VIVs)of stay cables are investigated with the combination of experimental and theoretical approachs.The multi-mode VIVs of an inclined and yawed flexible cable model are successfully reproduced in the wind tunnel tests.The flexible cable is manufactured with low mass and low damping.The experiment results indicate that the cable model exposed to uniform airflow is found to experience the first,second and third mode VIVs with the increase of incoming wind speed.The structural responses of VIVs are analyzed and the frequency lock-in phenomenon is observed for each mode of the VIVs of the flexible cable.A theoretical framework is formulated and the linear stability analysis is then performed to reveal that the first three modes of frequency lock-in observed in the VIVs of the stay cable are caused by the coupled wake flutter(CWF)mechanism.

关键词： Flexible cable vortex induced vibrations coupled wake flutter multi-mode behaviors

作者: Donglai Gao Wenli Chen Wenhan Yang Yewei Huang Hui Li

作者单位: School of Civil Engineering,Harbin Institute of Technology,Harbin,China

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 3158-3163

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）