Experiment Study on Nonlinear Impedance of Vibration Damper and Parameter Identification
Luo Xiaoyu 1, Zhang Yisheng 1, Xie Shuhong 2, Li Xinchu 2, Xu Zhilei 2, Liu Lijun 2
1. State Key Laboratory Of Material Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074;2. Jiangdong Fittings Equipment CO., LTD, Nantong 226463
Abstract：Vibration damper is widely used in overhead transmission lines to alleviate aeoline vibration. Impedance is important evaluation criteria. Aiming at studying its nonlinear characteristics, an impedance measurement method using sine frequency sweep was developed. By measuring impedance spectrum for vibration damper under different excitation velocity, mode frequencies and impedance for different velocity were identified, as well damping ratio for each mode frequency was calculated. Relationship between velocity and the vibration parameter was analyzed. At last, limitation of the existing linear mechanical model of the vibration damper was pointed out, by comparing the results of experiment and calculation.
2013, Vol. 32 
