Doubly Asymptotic Approximations for Submerged Structures With Internal Fluid Volumes: Formulation

[+] Author and Article Information
T. L. Geers, Peizhen Zhang

Center for Acoustics, Mechanics and Materials, Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309-0427

J. Appl. Mech 61(4), 893-899 (Dec 01, 1994) (7 pages) doi:10.1115/1.2901574 History: Received December 09, 1991; Revised October 18, 1993; Online March 31, 2008


Doubly asymptotic approximations (DAAs) are approximate temporal impedance relations for a medium in contact with a flexible body. In this paper, the method of operator matching previously used for external acoustic domains is used to develop first- and second-order boundary integral DAAs for internal acoustic domains. Corresponding boundary element forms permit the numerical solution of transient structural acoustics problems with complex geometry. The accuracy of the DAAs is assessed in the following companion paper by comparing DAA and exact solutions for a canonical problem with spherical geometry.

Copyright © 1994 by The American Society of Mechanical Engineers
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