Open Access

ARTICLE

Coupling of BEM/FEM for Time Domain Structural-Acoustic Interaction Problems

S.T. Lie¹, Guoyou Yu, Z. Zhao²

1 Corresponding Author
2 School of Civil & Structural Engineering, Nanyang Technology University, Nanyang Avenue, Singapore 639798. Tel: (65) 790 5284, Fax: (65)792 1650, E-mail: cstlie@ntu.edu.sg

Computer Modeling in Engineering & Sciences 2001, 2(2), 171-182. https://doi.org/10.3970/cmes.2001.002.171

Abstract

The BEM/FEM coupling procedure is applied to 2-D time domain structural-acoustic interaction problems. The acoustic domain for fluid or air is modeled by BEM scheme that is suitable for both finite and infinite domains, while the structure is modeled by FEM scheme. The input impact, which can be either plane waves or non-plane waves, can either be forces acting directly on the structural-acoustic system or be explosion sources. The far field or near field explosion sources which are difficult to be simulated by finite element modeling, can be simulated exactly by boundary element modeling as internal sources. In order to maintain the stability of the coupling procedure, the linear θ method is used in this study. Three examples have been studied to demonstrate the efficiency and accuracy of the proposed numerical procedure.

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Keywords

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