关键词: 被动隔振；非线性振动；频率响应特性；稳定性

Abstract:

Seismic response characteristics and vibration stability of the body isolated by the resilient material with nonlinear stiffness and nonlinear damping were investigated herein.The nonlinear dynamics equation including nonlinear stiffness and damping was developed.The frequency response equation was derived and nonlinear dynamic response to a seismic excitation were analyzed by the method of harmonic balance.The effectness of nonlinear factors and vibration stability were studied.The conclusions of the paper are helpful to the accurate design and effect analysis of vibration isolators.

Key words: vibration isolation；nonlinear vibration；frequency response characteristic；stability