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RESEARCH PAPERS

Consistent Formulation of Sound Radiation From Arbitrary Structure

[+] Author and Article Information
J. J. Engblom

Hughes Aircraft Company, Culver City, Calif.

R. B. Nelson

Mechanics and Structures Department, University of California, Los Angeles, Calif.

J. Appl. Mech 42(2), 295-300 (Jun 01, 1975) (6 pages) doi:10.1115/1.3423570 History: Received August 01, 1974; Revised November 01, 1974; Online July 12, 2010

Abstract

A refined and efficient approach is presented for determining the radiated sound pressure levels in an infinite acoustic medium produced by a closed structure undergoing harmonic vibratory motion. Refined acoustic and equilibrium relationships are developed and quadratic approximations are used to define the acoustic variables on the radiating surface. Efficiencies are inherent in the modal approach utilized to define an equilibrium relationship and in the treatment of improper integral forms. Examples include the special problem of a finite cylindrical cavity for which uniform radial velocity is specified. Also investigated is a thin elastic sphere for which particular modes of vibration are specified.

Copyright © 1975 by ASME
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