Modelling the transient interaction of a thin elastic shell with an exterior acoustic field

• Published in: International journal for numerical methods in engineering Vol. 75; no. 3; pp. 275 - 290
• Main Authors: Chappell, David J., Harris, Paul J., Henwood, David, Chakrabarti, Roma
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 16.07.2008; Wiley
• Subjects: Acoustics; Burton-Miller; Exact sciences and technology; fluid-structure interaction; Fundamental areas of phenomenology (including applications); Physics; Structural acoustics and vibration; time domain; Transient response; time domain; Thin shell; Fluid structure interaction; Modeling; Exact solution; Spherical shell; Finite element method; Time domain method; fluid-structure interaction; acoustics; Integral equation; External noise; Boundary element method; Burton-Miller; Structural acoustics
• ISSN: 0029-5981; 1097-0207
• DOI: 10.1002/nme.2253

Coupled finite and boundary element methods for solving transient fluid–structure interaction problems are developed. The finite element method is used to model the radiating structure, and the boundary element method (BEM) is used to determine the resulting acoustic field. The well‐known stability problems of time domain BEMs are avoided by using a Burton–Miller‐type integral equation. The stability, accuracy and efficiency of two alternative solution methods are compared using an exact solution for the case of a thin spherical elastic shell. The convergence properties of the preferred solution method are then investigated more thoroughly. Copyright © 2007 John Wiley & Sons, Ltd.