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RESEARCH PAPERS

Control of Sound Radiating from an Orthotropic Plate

[+] Author and Article Information
L. Meirovitch, S. Thangjitham

Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

J. Vib. Acoust 114(4), 531-539 (Oct 01, 1992) (9 pages) doi:10.1115/1.2930295 History: Received January 01, 1991; Online June 17, 2008

Abstract

This paper is concerned with the problem of actively suppressing the acoustic radiation pressure generated by an orthotropic plate vibrating in air. The approach is to control the vibration of the modes of the plate most responsible for acoustic radiation pressure. This is accomplished by relating the far-field radiation pressure to the state of the plate. The control of the far-field radiation pressure is carried out by means of actuators placed on the elastic plate. A numerical example demonstrates the application of active control to suppress the far-field sound radiating from a simply-supported rectangular thin orthotropic plate subjected to a harmonic disturbance. The influence on the control effectiveness of various design parameters, such as the number of controlled modes, the choice of controlled modes, and the number of actuators, is investigated.

Copyright © 1992 by The American Society of Mechanical Engineers
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