A limb-inspired bionic quasi-zero stiffness vibration isolator  

作　　者：Rong Zeng Guilin Wen Jiaxi Zhou Gang Zhao 

机构地区：[1]State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha 410082,China [2]School of Mechanical and Electric Engineering,Guangzhou University,Guangzhou 510006,China

出　　处：《Acta Mechanica Sinica》2021年第7期1152-1167,I0003,共17页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants 11832009 and 11672104);the Chair Professor of Lotus Scholars Program in Hunan province(Grants XJT2015408)。

摘　　要：Vibration reduction has always been one of hot and important topics in mechanical engineering,especially for the special measurement instrument.In this paper,a novel limb-inspired bionic structure is proposed to generate negative stiffness and design a new quasi-zero stiffness isolator via torsion springs,distinguishing from the existing tension spring structures in the literature.The nonlinear mathematical model of the proposed structure is developed and the corresponding dynamic properties are further investigated by using the Harmonic Balance method and ADAMS verification.To evaluate the vibration isolation performance,typical three-springs quasi-zero stiffness(TS QZS)system is selected to compare with the proposed bionic structure.And the graphical processing unit(GPU)parallel technology is applied to perform necessary two-parameter analyses,providing more insights into the effects of parameters on the transmissibility.It is shown that the proposed structure can show advantages over the typical TS QZS system in a wider vibration isolation range for harmonic excitation case and shorter decay time for the impact excitation case.

关 键 词：Limb-inspired bionic structure Quasi-zero stiffness Torsion springs Two-parameter analyses 

分 类 号：TU112.596[建筑科学—建筑理论]