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RESEARCH PAPERS

Nonaxisymmetric Acoustic Radiation and Scattering From Rigid Bodies of Revolution Using the Surface Variational Principle

[+] Author and Article Information
J. H. Ginsberg, Kuangcheng Wu

G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

J. Vib. Acoust 120(1), 95-103 (Jan 01, 1998) (9 pages) doi:10.1115/1.2893832 History: Received August 01, 1994; Online February 26, 2008

Abstract

The surface variational principle (SVP), which represents the surface response as a series of basis functions spanning the entire surface, provides a global description of acoustic fluid-structure interaction that has many of the benefits associated with analytical methods. This paper describes the extension of SVP to model the interaction between the velocity and pressure on the surface of an axisymmetric body subjected to nonaxisymmetric excitation. Problems addressed are radiation due to arbitrary rigid body motion, and scattering associated with arbitrary incidence of a plane wave on a stationary rigid body. Numerical results are presented for flat-ended and hemi-capped cylinders. These results are compared to those obtained from the CHIEF-88 and SHIP-92 computer codes. The convergence properties of SVP are examined in detail, particularly for its requirements when ka is in the upper part of the mid-frequency range.

Copyright © 1998 by The American Society of Mechanical Engineers
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