On the force transmissibility of a vibration isolator with quasi-zero stiffness

A Carrella, MJ Brennan, I Kovacic, TP Waters

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

In this article the force transmissibility of a quasi-zero-stiffness (QZS) isolator is considered. The isolator comprises a vertical spring and two oblique springs that are either linear, linear with pre-stress or softening nonlinear with pre-stress. The force transmissibility of such a system is derived and compared with that of a linear system. Assuming light damping, simple approximate expressions for the maximum transmissibility and jump-down frequencies are derived. It is shown that there are advantages in having nonlinear and pre-stressed oblique springs compared to the other configurations, and that all the QZS systems can outperform the linear system provided that the system parameters are chosen appropriately.
Translated title of the contributionOn the force transmissibility of a vibration isolator with quasi-zero stiffness
Original languageEnglish
Pages (from-to)707 - 711
Number of pages11
JournalJournal of Sound and Vibration
Volume322 (4-5)
DOIs
Publication statusPublished - May 2009

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