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所属单位：能源与动力学院

发表刊物：NONLINEAR DYNAMICS

关键字：Vibration isolator Quasi-zero stiffness Nonlinear damping Transmissibility Averaging method

摘要：A geometric nonlinear damping is proposed and applied to a quasi-zero stiffness (QZS) vibration isolator with the purpose of improving the performance of low-frequency vibration isolation. The force, stiffness and damping characteristics of the system are presented first. The steady-state solutions of the QZS system are obtained based on the averaging method for both force and base excitations and further verified by numerical simulation. The force and displacement transmissibility of the QZS vibration isolator are then analysed. The results indicate that increasing the nonlinear damping can effectively suppress the force transmissibility in resonant region with the isolation performance in higher frequencies unaffected. In addition, the application of the nonlinear damping in the QZS vibration isolator can essentially eliminate the unbounded response for the base excitation. Finally, the equivalent damping ratio is defined and discussed from the viewpoint of vibration control.

ISSN号：0924-090X

是否译文：否

发表时间：2017-03-01

合写作者：Cheng, Chun,王永亮,Jiang, Xingxing

通讯作者：李舜酩