An efficient and high‐order frequency‐domain approach for transient acoustic–structure interactions in three dimensions. (18th March 2016)

• Record Type: Journal Article
• Authors: Lin, Junshan
• Is Part Of: International journal for numerical methods in engineering. Volume 108:Number 7(2016)
• Page Start: 790
• Page End: 816
• Publication Date: 2016-03-18
• Subjects: acoustic–structure interaction -- frequency‐domain approach -- exponential window -- boundary integral equation; Numerical analysis -- Periodicals; Engineering mathematics -- Periodicals; 620.001518
• DOI: 10.1002/nme.5243
• Languages: English
• ISSNs: 0029-5981

Abstract

Summary: This paper is concerned with numerical solution of the transient acoustic–structure interaction problems in three dimensions. An efficient and higher‐order method is proposed with a combination of the exponential window technique and a fast and accurate boundary integral equation solver in the frequency‐domain. The exponential window applied to the acoustic–structure system yields an artificial damping to the system, which eliminates the wrap‐around errors brought by the discrete Fourier transform. The frequency‐domain boundary integral equation approach relies on accurate evaluations of relevant singular integrals and fast computation of nonsingular integrals via the method of equivalent source representations and the fast Fourier transform. Numerical studies are presented to demonstrate the accuracy and efficiency of the method. Copyright © 2016 John Wiley & Sons, Ltd.