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Title of Journal: J Mech Sci Technol

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Abbravation: Journal of Mechanical Science and Technology

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Korean Society of Mechanical Engineers

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DOI

10.1007/bf00290441

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1976-3824

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Passive acoustic radiation control for a vibrating

Authors: JinYoung Jeon
Publish Date: 2009/05/15
Volume: 23, Issue: 5, Pages: 1446-1455
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Abstract

This paper presents a new acoustic radiation optimization method for a vibrating panellike structure with a passive piezoelectric shunt damping system in order to minimize wellradiating modes generated from the panel The optimization method is based on an idea of using the pversion finite element methodpversion FEM the boundary element methodBEM and the particle swarm optimization algorithmPSOA Optimum embossment design for the vibrating panel using the PSOA is first investigated in order to minimize noise radiation over a frequency range of interest The optimum embossment design works as a kind of stiffener so that wellradiating natural modes are shifted up with some degrees The optimized panel however may still require additional damping for attenuating the peak acoustic amplitudes A passive shunt damping system is thus employed to additionally damp the wellradiating modes from the optimized panel To numerically evaluate the acoustic multiplemode damping capability by a shunt damping system the integrated pversion FEM/BEM for the panel with the shunt damping system is modeled and developed by MATLAB Using the PSOA the optimization technique for the optimal multiplemode shunt damper is investigated in order to achieve the optimum damping performance for the wellradiating modes simultaneously Also the acoustic damping performance of the shunt damping circuit in the acoustic environment is demonstrated numerically and experimentally with respect to the realistically sized panel The simulated result shows a good agreement with that of the experimental resultJinYoung Jeon received his PhD degree in Mechanical and Aerospace Engineering from Tokyo Institute of Technology in 2005 Dr Jeon is currently a senior engineer at Digital Printing Division Digital Media Communications Business at Samsung Electronics Co Ltd Korea His research interests are the areas of structuralacoustic optimization sound quality motion quality and vibration control

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