A unified family of generalized integration operators [GInO] for non-linear structural dynamics: implementation aspects

The present paper proposes recent developments in theoretical and implementation aspects including parallel computations via a single analysis code of a unified family of generalized integration operators [GInO] in time with particular emphasis on non-linear structural dynamics. The focus of this research is on the implementation aspects including the development of coarse-grained parallel computational models for such generalized time integration operators that he can readily ported to a wide range of parallel architectures via a message-passing paradigm (using MPI) and domain decomposition techniques. The implementation aspects are first described followed by an evaluation for a. range of problems which exhibit Large deformation, elastic, elastic-plastic dynamic behavior. For geometric non-linearity a total Lagrangian formulation and for material non linearity elasto-plastic formulations are employed. Serial and parallel performance issues on the SOI Origin 2000 system are discussed and analyzed for illustration for selected schemes. For illustration, particular forms of [GInO] are investigated and a complete development via a single analysis code is currently underway. Nevertheless, this is the first time that such a capability is plausible and the developments further enhance computational structural dynamics areas. (C) 2000 Elsevier Science Ltd. All rights reserved.