✦ LIBER ✦

Nonreflecting boundary conditions in acoustics for finite element methods based upon off-surface boundary integral equations

✍ Scribed by A. Muğan; G.M. Hulbert

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 423 KB
Volume: 188
Category: Article
ISSN: 0045-7825
DOI: 10.1016/s0045-7825(99)00153-x

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✦ Synopsis

An o-surface boundary integral (OSBI) method is presented as a mesh termination scheme for solving large or in®nite domain problems of acoustics. By using ®nite element approximations, the discretized boundary integral equation is used to solve for the Neumann boundary condition term in terms of the Dirichlet boundary condition term which is then substituted into associated ®nite element formulations. Comparison is made of the new OSBI technique with the DtN method of Givoli and Keller. As shown, the proposed boundary condition is accurate, well suited for use with ®nite element (FE) methods and competitive with the DtN method.

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