COUPLING OF FINITE ELEMENT AND BOUNDARY ELEMENT METHODS FOR TRANSIENT ELASTODYNAMICS

000022255 001__ 22255
000022255 005__ 20170622150004.0
000022255 04107 $$aeng
000022255 046__ $$k2015-05-25
000022255 100__ $$aFrancois, Stijn
000022255 24500 $$aCOUPLING OF FINITE ELEMENT AND BOUNDARY ELEMENT METHODS FOR TRANSIENT ELASTODYNAMICS

000022255 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022255 260__ $$bNational Technical University of Athens, 2015
000022255 506__ $$arestricted
000022255 520__ $$2eng$$aThe dynamic interaction between civil engineering structures and the surrounding soil domain often plays a crucial role and should be accounted for in numerical models. This paper discusses the coupling of finite element (FE) and boundary element (BE) methods for the solution of transient dynamic soil-structure interaction problems in the time domain. As both the FE and the BE method impose different requirements on the time step for reasons of stability and accuracy, iterative coupling schemes are applied since they allow for a different time discretization in both subdomains. Apart from a direct coupling approach, various sequential and parallel iterative coupling strategies are investigated, imposing either Neumann or Dirichlet boundary conditions on the FE and BE subdomain. The use of interface relaxation accelerates convergence, where Aitken's method provides an optimal relaxation parameter for all iterative strategies considered. It is demonstrated that the boundary conditions applied to each subdomain strongly affect the efficiency of these algorithms; the application of Neumann boundary conditions on the stiffest subdomain results in the fastest convergence. The iterative coupling strategy is useful in the case where different time steps are used in both subdomains, although a direct coupling can also be used. The applicability of the iterative coupling strategy is demonstrated by the computation of ground vibrations due to impact pile driving.

000022255 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022255 653__ $$a

000022255 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022255 720__ $$aFrancois, Stijn$$iDegrande, Geert$$iCoulier, Pieter
000022255 8560_ $$ffischerc@itam.cas.cz
000022255 8564_ $$s9271$$uhttps://invenio.itam.cas.cz/record/22255/files/C1681_abstract.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022255 962__ $$r22030
000022255 980__ $$aPAPER

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