A quasi-zero-stiffness isolator with a shear-thinning viscous damper

Abstract Quasi-zero-stiffness (QZS) vibration isolators have been widely studied, because they show excellent high static and low dynamic stiffnesses can effectively solve low-frequency ultralow-frequency vibration. However, traditional QZS (T-QZS) usually adopt linear damping, owing to which achieving good isolation performance at both frequencies is difficult. T-QZS exhibit hardening stiffness characteristics, their even worse than that of under a large excitation amplitude. Therefore, this study proposes isolator with shear-thinning viscous damper (SVD) improve the isolators. The force-velocity relation SVD obtained, model established for isolator. responses system are solved using harmonic balance method (HBM) Runge-Kutta method. evaluated force transmissibility, parameters analyzed. results compared isolators, proposed QZS-SVD achieves lower initial frequency peak value, exhibits better medium frequencies. Moreover, withstand amplitude in effective range.