Enhancing the isolation performance by a nonlinear secondary spring in the Zener model

摘要: In order to obtain an isolator with low resonance amplitude as well good isolation performance at high frequencies, this paper explores the usage of nonlinear stiffness elements improve transmissibility efficiency a sufficient linear damped vibration featured Zener model. More specifically, we intend its original poor high-frequency and meanwhile maintain or even reduce already by adding secondary spring into isolator. Its performances are evaluated under two input scenarios namely force displacement base excitations, respectively. Thereafter, both analytical numerical study is performed compare condition corresponding one. Results show that introduction in model can achieve ideal improvement, i.e., reducing frequencies suppressing amplitude. It also shown decreases rate 40dB/decade which has not been achieved isolators rigidly connected damper. As easier fabricate have wider range choices parameters than damper, new promote practical applications such isolators.