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Structural vibration absorption in multilayered sandwich structures using negative stiffness nonlinear oscillators

journal contribution
posted on 17.09.2021, 10:12 by Han Meng, Xiuchang Huang, Yanyu Chen, Stephanos TheodossiadesStephanos Theodossiades, Dimitrios Chronopoulos
We hereby report on the incorporation of negative stiffness oscillators realized through Euler buckled beams within vibrating multilayered sandwich structures. Such devices have been extensively investigated as single degree of freedom isolation mechanisms when mechanical grounding is available. It is worth exploring the influences of implementing such mechanisms within continuous multilayered vibrating structures given their interesting nonlinear vibration isolation characteristics. A numerical investigation is presented in this work with the computed performance being compared against the one of linear oscillators of equal mass and damping properties. Despite the fact that the negative stiffness nonlinear (NSN) oscillators were not properly optimized for the specific application due to the implied computational cost, they exhibited superior performance to their linear counterparts in a broadband sense. Considering the dependence of the linear resonators’ performance to manufacturing precision and narrowband excitation, the NSN concept is an excellent candidate for attenuating structural vibration across a wide spectrum.

Funding

H2020 Marie Sklodowska-Curie grant [Grant No. DiaMoND 785859]

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Applied Acoustics

Volume

182

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Applied Acoustics and the definitive published version is available at https://doi.org/10.1016/j.apacoust.2021.108240.

Acceptance date

07/06/2021

Publication date

2021-07-01

Copyright date

2021

ISSN

0003-682X

eISSN

1872-910X

Language

en

Depositor

Prof Stephanos Theodossiades. Deposit date: 15 September 2021

Article number

108240