Analytical Sensitivity of Acoustic Power Radiated from Plates

[+] Author and Article Information
R. R. Salagame, A. D. Belegundu, G. H. Koopmann

Department of Mechanical Engineering, The Pennsylvania State University, 207 Mechanical Engineering Building, University Park, PA 16802

J. Vib. Acoust 117(1), 43-48 (Jan 01, 1995) (6 pages) doi:10.1115/1.2873865 History: Received January 01, 1993; Revised September 01, 1993; Online February 26, 2008


A general formulation to obtain the analytical expressions for the sensitivity of the acoustic power radiated by a vibrating structure to one of its design variables is described. The formulation, which is based on finite elements, is applied to both single frequency and broad band harmonic excitation of plates. The sensitivity coefficients indicate the effect of changing various design or modeling parameters on the acoustic power and can be used to optimize the structure for minimum sound radiation. Analytical sensitivity estimates are compared with finite difference values. Results show that analytical sensitivity analysis is important from both computational time and accuracy points of view.

Copyright © 1995 by The American Society of Mechanical Engineers
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