✦ LIBER ✦

Elastodynamic direct boundary element methods with enhanced numerical stability properties

✍ Scribed by B. Birgisson; E. Siebrits; A. P. Peirce

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 172 KB
Volume: 46
Category: Article
ISSN: 0029-5981
DOI: 10.1002/(sici)1097-0207(19991030)46:6<871::aid-nme698>3.0.co;2-6

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✦ Synopsis

Evidence of numerical instabilities in two-dimensional time domain direct boundary element methods is presented. The e!ects of numerical versus analytical integration of spatial integrals on stability are shown, and two new time-stepping algorithms are introduced and compared to existing formulations. The so-called new &direct half-step' scheme and the &epsilon' scheme are shown to improve the numerical stability of direct boundary element methods.