Active control of structurally radiated sound from plates
Journal
Journal of the Acoustical Society of America
Journal Volume
102
Journal Issue
1
Pages
370-381
Date Issued
1997
Author(s)
Abstract
Active control of sound radiation from a clamped rectangular plate by piezoelectric moments is investigated both analytically and experimentally. A new theoretical derivation for the dynamic response of a plate excited by steady-state harmonic point forces, couples, and piezomoments is presented. Four point moments, simulating a piezoceramic patch bonded directly on the surface of the plate, are used to achieve the control. Control gain is obtained by minimizing the sound radiation power. The sound radiation measurement is conducted in a reverberation room equipped with an anechoic chamber. The results indicate that this research not only provides an accurate and efficient approach to theoretically predict the response of a clamped rectangular plate subjected to piezomoment excitation but also achieves effective global attenuation of sound radiation power. The highest reduction of the total power radiated from the plate was approximately 24 dB.
SDGs
Type
journal article