Abstract
Objective
In this paper, a novel Quasi-zero stiffness (QZS) vibration isolator (VI) is proposed where the negative stiffness is realized by biaxial slider-connector-springs, which presents superior static load bearing and dynamic vibration isolation capacity compared with its uniaxial counterpart.
Methodology
The outperformance of the proposed VI can be guaranteed only when two independent structural parameters satisfy a certain criterion, according to static analysis. On the other hand, dynamic analysis is performed to validate the superiority of the novel QZS VI in terms of force transmissibility and isolation frequency band. Careful consideration is given to the selection of structural parameters, according to the limitation for displacement amplitude in real engineering. Finally, experimental prototype of the novel QZS VI is conducted to confirm its advantage compared to the previous VI.
Application
The results present inspiration for development of new high-static-low-dynamic-stiffness (HSLDS) with ultralow frequency VI characteristics.