Araújo, Francisco Célio deMartins, Cláudio JoséMansur, Webe João2013-01-282013-01-282001ARAÚJO. F. C. de; MARTINS, C. J.; MANSUR, W. J. An efficient BE iterative-solver-based substructuring algorithm for 3D time-harmonic problems in elastodynamics. Engineering Analysis with Boundary Elements, v. 25, n. 9, p. 795-803, out. 2001. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0955799701000613>. Acesso em: 28 jan. 2013.09557997http://www.repositorio.ufop.br/handle/123456789/2069This work is concerned with the development of an efficient and general algorithm to solve frequency-domain problems modelled by the boundary element method based on a sub-region technique. A specific feature of the algorithm discussed here is that the global sparse matrix of the coupled system is implicitly considered, i.e. problem quantities are not condensed into interface variables. The proposed algorithm requires that only the block matrices with non-zero complex-valued coefficients be stored and manipulated during the analysis process. In addition, the efficiency of the technique presented is improved by using iterative solvers. The good performance of pre-conditioned iterative solvers for systems of equations having real-valued coefficients, well demonstrated in the literature, is confirmed for the present case where the system matrix coefficients are complex. The efficiency of the algorithm described here is verified by analysing a soil–machine foundation interaction problem. CPU time and accuracy are the parameters used for estimating the computational efficiency.en-USBoundary element method3D elastodynamicsFrequency-dependent problemsIterative solversComplex non-Hermitian matricesArtigo publicado em periodicoO periódico Engineering Analysis with Boundary Elements concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3244750479976.