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Titolo:
Further improvement to the stability of the coupling BEM/FEM scheme for 2-D elastodynamic problems
Autore:
Lie, ST; Yu, G; Fan, SC;
Indirizzi:
Nanyang Technol Univ, Sch Civil & Struct Engn, Singapore 639798, SingaporeNanyang Technol Univ Singapore Singapore 639798 gapore 639798, Singapore
Titolo Testata:
COMPUTATIONAL MECHANICS
fascicolo: 5, volume: 25, anno: 2000,
pagine: 468 - 476
SICI:
0178-7675(200005)25:5<468:FITTSO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
TIME-DOMAIN BEM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Lie, ST Nanyang Technol Univ, Sch Civil & Struct Engn, Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ Nanyang Ave Singapore Singapore639798 apore
Citazione:
S.T. Lie et al., "Further improvement to the stability of the coupling BEM/FEM scheme for 2-D elastodynamic problems", COMPUT MECH, 25(5), 2000, pp. 468-476

Abstract

The stability of the coupling BEM/FEM scheme as applied in 2-D elastodynamic problems is studied further. The linear theta method, which is more stable than the standard BEM scheme (Mansur, 1983), makes the coupling BEM/FEM scheme more stable also. But due to the inter-influence of these two kinds of numerical methods - FEM and BEM, the coupling of BEM and FEM is less stable than both BEM algorithm and FEM algorithm. Unlike in FEM, any error in BEM scheme will affect all the later results, which makes the BEM proceduretends to be less stable. And even more, a procedure that is stable when only BEM is used can be unstable in the coupling BEM/ FEM procedure due to the effect of the oscillations by FEM. The procedure used in this paper is toreduce such kind of oscillations caused by the FEM scheme, so that it willnot cause instability problem to the BEM scheme and further maintain the stability of the coupling BEM/ FEM scheme. Although little numerical dampingwill be introduced by the new method, the stability is greatly improved and the computer time is nearly the same.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 07:56:19