Cable’s compound vibration reduction method under cable-girder coupled vibration
Liang Dong1,2, Di Fangdian1, Chen Hongxia1, Duan Wenbo1, Li Zishuo1
1. School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China;
2. Hebei Provincial Civil Engineering Technology Research Center, Tianjin300401, China
Abstract：Both results of study and engineering practice showed that the damping effect of a viscous damper is weakened when cable-girder coupled vibration happens. In order to ensure good vibration damping effect of a viscous damper under cable-girder coupled vibration, a cable’s compound vibration reduction method with a viscous damper and an added MTMD was proposed here. A simplified theoretical model with cable, viscous damper and MTMD was analyzed using the complex modal analysis method, and a test model of a cable-damper-MTMD system was designed. Both theoretical analysis and test results showed that the added MTMD designed according to the main contribution mode can assist the viscous damper to suppress the vibration of the main mode to utmost extent; the proposed method can effectively compensate the loss of damping effect of the viscous damper due to cable-girder coupled vibration.
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