Abstract:The study is proposed to investigate the rubber damper deployed in precision instrument. The nonlinear stiffness characteristics of the damper are obtained due to hyperelastic rubber analysis with FE method, and thus the nonlinear dynamic model is built. Combined with harmonic balance method and vector solution, the dynamic characteristics of the damper are calculated. On that basis, a series of experiments are conducted, which verified that the simulation computation conforms to the experiment results. This study illustrates that the nonlinear model of the rubber damper is effective and provides the foundation for further analysis about the damper behavior and the response of the loaded precision instrument.