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Point mobility of a cylindrical plate incorporating a tapered hole of power-law profile

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journal contribution
posted on 21.06.2012 by Daniel O'Boy, E.P. Bowyer, Victor V. Krylov
The paper describes the results of experimental measurements of point mobility carried out on circular plates containing tapered holes of quadratic power-law profile with attached damping layers. The obtained results are compared to the developed numerical model, as a means of validation. The profiles of the tapered hole in the plates are designed to replicate near zero reflection of quasi-plane waves from a tapered hole in geometrical acoustics approximation, also known as acoustic black hole effect. The driving point mobility measurements are provided, showing a comparison of the results for a constant thickness circular plate, a constant thickness plate with a layer of damping film applied and a plate with a quadratic power-law profile machined into the center, which is tested with a thin layer of elastic damping material attached. The results indicate a substantial suppression of resonant peaks, agreeing with a numerical model, which is based on the analytical solution available for the vibration of a plate with a central quadratic power-law profile. The paper contains results for the case of free boundary conditions on all edges of the plates, with emphasis placed on the predictions of resonant frequencies and the amplitudes of vibration and loss factor. (c) 2011 Acoustical Society of America. [DOI: 10.1121/1.3585844]

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Citation

O'BOY, D.J., BOWYER, E.P. and KRYLOV, V.V., 2011. Point mobility of a cylindrical plate incorporating a tapered hole of power-law profile. Journal of the Acoustical Society of America, 129 (6), pp. 3475 - 3482

Publisher

© Acoustical Society of America

Version

AM (Accepted Manuscript)

Publication date

2011

Notes

This article was published in the Journal of the Acoustical Society of America [© Acoustical Society of America] and the definitive version is available at: http://dx.doi.org/10.1121/1.3585844

ISSN

0001-4966

Language

en

Exports