Modeling of sound transmitted into a cavity through a composite plate using coupled FE/BE method and control of acoustic pressure using piezoelectric actuators

Yucheng Shi; Chuh Mei

doi:10.1117/12.350103

4 June 1999 Modeling of sound transmitted into a cavity through a composite plate using coupled FE/BE method and control of acoustic pressure using piezoelectric actuators

Yucheng Shi, Chuh Mei

Author Affiliations +

Proceedings Volume 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures; (1999) https://doi.org/10.1117/12.350103
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

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.

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Yucheng Shi and Chuh Mei "Modeling of sound transmitted into a cavity through a composite plate using coupled FE/BE method and control of acoustic pressure using piezoelectric actuators", Proc. SPIE 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures, (4 June 1999); https://doi.org/10.1117/12.350103

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