000015581 001__ 15581
000015581 005__ 20161115135324.0
000015581 04107 $$aeng
000015581 046__ $$k2013-06-12
000015581 100__ $$aCoulier, P.
000015581 24500 $$aCoupling of Finite Elements and Hierarchical Boundary Elements for Dynamic Soil-Structure Interaction Problems

000015581 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015581 260__ $$bNational Technical University of Athens, 2013
000015581 506__ $$arestricted
000015581 520__ $$2eng$$aThis paper discusses the coupling of finite element and fast boundary element methods based on hierarchical matrices to solve problems of visco–elastodynamic wave propagation involving dynamic soil–structure interaction in the frequency domain. Three coupling methodologies are presented and their computational performance is assessed through numerical examples. It is demonstrated that a direct coupling approach, in which the boundary element domain is condensed into an equivalent dynamic stiffness matrix, is the least efficient. Iterative procedures provide a valuable alternative; the efficiency of these algorithms strongly depends on the kind of boundary conditions applied to each subdomain, however. The fastest convergence is observed if Neumann boundary conditions are imposed on the most stiff subdomain. Aitken’s ∆2 –method is employed in these schemes for the calculation of an optimized interface relaxation parameter in order to ensure and speed up the convergence. A monolithic coupling approach is presented as well, providing a simultaneous solution of the governing equations while avoiding the assembly of a dynamic soil stiffness matrix.

000015581 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015581 653__ $$aFE–BE coupling, iterative methods, interface relaxation, H –matrices, dynamic soil–structure interaction.

000015581 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015581 720__ $$aCoulier, P.$$iFranCois, S.$$iLombaert, G.$$iDegrande, G.
000015581 8560_ $$ffischerc@itam.cas.cz
000015581 8564_ $$s845786$$uhttps://invenio.itam.cas.cz/record/15581/files/1107.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 24 ADVANCES IN MODELING OF WAVE PROPAGATION AND APPLICATIONS
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000015581 962__ $$r15525
000015581 980__ $$aPAPER