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Damping of flexural vibrations in rectangular plates using the acoustic black hole effect

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journal contribution
posted on 21.06.2012, 15:30 by Daniel O'BoyDaniel O'Boy, Victor V. Krylov, V. Kralovic
The reduction of flexural vibration in plate structures has been investigated using the recently reported acoustic black hole effect for flexural wave reflection in plates with the local thickness varying according to h(x) = epsilon x(m) and m >= 2. Since sharp edges of such plates (wedges) are always truncated before x=0, the real reflection coefficients are relatively high, therefore the application of a small amount of damping is required to achieve large reductions in vibration amplitude. This paper presents a numerical model of a plate incorporating an acoustic black hole wedge, with predictions for vibration amplitudes. These are compared to equivalent experimental measurements for a range of applied damping layers. It is concluded that the above-mentioned power-law wedges can be used as effective vibration dampers in plate structures over a wide frequency range of interest. (C) 2010 Elsevier Ltd. All rights reserved.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Citation

O'BOY, D.J., KRYLOV, V.V. and KRALOVIC, V., 2010. Damping of flexural vibrations in rectangular plates using the acoustic black hole effect. Journal of Sound and Vibration, 329 (22), pp. 4672 - 4688

Publisher

© Elsevier Ltd.

Version

SMUR (Submitted Manuscript Under Review)

Publication date

2010

Notes

This article was published in the Journal of Sound and Vibration [© Elsevier Ltd.] and the definitive version is available at: http://dx.doi.org/10.1016/j.jsv.2010.05.019

ISSN

0022-460X

Language

en