刊名：Applied Mathematics and Mechanics (English Edition)
年，卷（期）：2022年，43卷，3期
页码：311-326
题名：A quasi-zero-stiffness isolator with a shear-thinning viscous damper
作者：Guilin WEN1,2, Yu LIN1, Junfeng HE1
单位：1. School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou 510006, China;
2. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei Province, China
摘要：Quasi-zero-stiffness (QZS) vibration isolators have been widely studied, because they show excellent high static and low dynamic stiffnesses and can effectively solve low-frequency and ultralow-frequency vibration. However, traditional QZS (T-QZS) vibration isolators usually adopt linear damping, owing to which achieving good isolation performance at both low and high frequencies is difficult. T-QZS isolators exhibit hardening stiffness characteristics, and their vibration isolation performance is even worse than that of linear vibration isolators under a large excitation amplitude. Therefore, this study proposes a QZS isolator with a shear-thinning viscous damper (SVD) to improve the vibration isolation performance of the T-QZS isolators. The force-velocity relation of the SVD is obtained, and a dynamic model is established for the isolator. The dynamic responses of the system are solved using the harmonic balance method (HBM) and the Runge-Kutta method. The vibration isolation performance of the system is evaluated using force transmissibility, and the isolator parameters are analyzed. The results show that compared with the T-QZS isolators, the proposed QZS-SVD isolator achieves the lower initial vibration isolation frequency and peak value, and exhibits better vibration isolation performance at medium and high frequencies. Moreover, the proposed isolator can withstand a large excitation amplitude in the effective vibration isolation range.
关键词：quasi-zero-stiffness (QZS) isolator, shear-thinning viscous damper (SVD), vibration isolation, force transmissibility
全文链接：https://www.amm.shu.edu.cn/EN/10.1007/s10483-022-2829-9
https://link.springer.com/article/10.1007/s10483-022-2829-9