✦ LIBER ✦

Multi-time-step integration using nodal partitioning

✍ Scribed by P. Smolinski; T. Belytschko; M. Neal

Publisher: John Wiley and Sons
Year: 1988
Tongue: English
Weight: 465 KB
Volume: 26
Category: Article
ISSN: 0029-5981
DOI: 10.1002/nme.1620260205

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✦ Synopsis

An algorithm is presented which integrates different groups of nodes of a finite element mesh with different time steps and different integrators. Since the nodal groups are updated independently no unsymmetric systems need be solved. Stability is demonstrated by showing that an energy norm of the solution decreases after every update if the time step is less than a given critical value. The element eigenvalue inequality theorem is used to give the critical time step in terms of element eigenvalues.

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