期刊
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
卷 62, 期 12, 页码 1677-1690出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/nme.1242
关键词
acoustic-structure interaction; BEM-FEM coupling; multipole BEM
A coupling algorithm based on Lagrange multipliers is proposed for the simulation of structure-acoustic field interaction. Finite plate elements are coupled to a Galerkin boundary element formulation of the acoustic domain. The interface pressure is interpolated as a Lagrange multiplier, thus, allowing the coupling of non-matching grids. The resulting saddle-point problem is solved by an approximate Uzawa-type scheme in which the matrix-vector products of the boundary element operators are evaluated efficiently by the fast multipole boundary element method. The algorithm is demonstrated on the example of a cavity-backed elastic panel. Copyright (c) 2005 John Wiley A Sons, Ltd.
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