Loughborough University
Browse

File(s) under permanent embargo

Reason: This item is currently closed access.

On the effects of mistuning a force-excited system containing a quasi-zero-stiffness vibration isolator

journal contribution
posted on 2015-06-24, 13:49 authored by Ali Abolfathi, M.J. Brennan, T.P. Waters, B. Tang
Nonlinear isolators with high-static-low-dynamic-stiffness have received considerable attention in the recent literature due to their performance benefits compared to linear vibration isolators. A quasi-zero-stiffness (QZS) isolator is a particular case of this type of isolator, which has a zero dynamic stiffness at the static equilibrium position. These types of isolators can be used to achieve very low frequency vibration isolation, but a drawback is that they have purely hardening stiffness behavior. If something occurs to destroy the symmetry of the system, for example, by an additional static load being applied to the isolator during operation, or by the incorrect mass being suspended on the isolator, then the isolator behavior will change dramatically. The question is whether this will be detrimental to the performance of the isolator and this is addressed in this paper. The analysis in this paper shows that although the asymmetry will degrade the performance of the isolator compared to the perfectly tuned case, it will still perform better than the corresponding linear isolator provided that the amplitude of excitation is not too large.

Funding

Professors Brennan and Tang wish to acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 11202048), and CNPq of Brazil (Grant No. 401360/ 2012-1).

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Journal of Vibration and Acoustics, Transactions of the ASME

Volume

137

Issue

4

Citation

ABOLFATHI, A. ... et al, 2015. On the effects of mistuning a force-excited system containing a quasi-zero-stiffness vibration isolator. Journal of Vibration and Acoustics, 137 (4), 044502.

Publisher

© ASME

Version

  • VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015

Notes

This paper is closed access.

ISSN

1048-9002

eISSN

1528-8927

Language

  • en

Usage metrics

    Loughborough Publications

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC