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

On the force transmissibility of a vibration isolator with quasi-zero-stiffness
On the force transmissibility of a vibration isolator with quasi-zero-stiffness
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.
0022-460X
707-717
Carrella, A.
1a1904a5-80c2-435a-b3d4-2e26d87ece61
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Kovacic, I.
0cc9489a-2da3-418d-8908-6a902809ef3b
Waters, T.P.
348d22f5-dba1-4384-87ac-04fe5d603c2f
Carrella, A.
1a1904a5-80c2-435a-b3d4-2e26d87ece61
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Kovacic, I.
0cc9489a-2da3-418d-8908-6a902809ef3b
Waters, T.P.
348d22f5-dba1-4384-87ac-04fe5d603c2f

Carrella, A., Brennan, M.J., Kovacic, I. and Waters, T.P. (2009) On the force transmissibility of a vibration isolator with quasi-zero-stiffness. Journal of Sound and Vibration, 322 (4-5), 707-717. (doi:10.1016/j.jsv.2008.11.034).

Record type: Article

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.

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Published date: 10 January 2009

Identifiers

Local EPrints ID: 145197
URI: https://eprints.soton.ac.uk/id/eprint/145197
ISSN: 0022-460X
PURE UUID: d0b26e6b-2e68-4eee-ae99-0432df6be018

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Date deposited: 16 Apr 2010 11:18
Last modified: 17 Jul 2019 00:06

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