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Proceedings Paper

Modeling of sound transmitted into a cavity through a composite plate using coupled FE/BE method and control of acoustic pressure using piezoelectric actuators
Author(s): Yucheng Shi; Chuh Mei
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Paper Abstract

A coupled finite element/boundary element method is developed for the fully coupled structural/acoustic/piezoelectric system. This approach uses the dual reciprocity boundary element method to describe time dependent acoustic field and the finite element to structures and piezoelectric materials. A time-domain formulation of the coupled method is obtained. Based on the coupled time domain formulation, linear quadratic regulator and a feedforward controller are applied to reduce the acoustic pressure transmitted into a cavity through a composite plate using embedded piezoelectric actuators. The controls of interior acoustic fields due to excitations at different frequencies are investigated, transmission losses and deflection of the plates of the controlled and uncontrolled systems are presented.

Paper Details

Date Published: 4 June 1999
PDF: 13 pages
Proc. SPIE 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures, (4 June 1999); doi: 10.1117/12.350103
Show Author Affiliations
Yucheng Shi, Analytical Services and Materials, Inc. (United States)
Chuh Mei, Old Dominion Univ. (United States)


Published in SPIE Proceedings Vol. 3667:
Smart Structures and Materials 1999: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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