A Hybrid Substructuring Method and an Adaptive Refinement Scheme for the Distributed Solution of Three-Dimensional Structural Problems 921082
A saddle-point variational principle is constructed to derive a hybrid substructuring method for the parallel solution of three-dimensional structural mechanics problems. A given mesh is partitioned into disconnected submeshes, and an incomplete solution for the displacement field is first evaluated via a direct method. Next, intersubdomain field continuity is enforced via discrete, polynomial, and/or piece-wise polynomial Lagrange multipliers. The proposed methodology is intrinsically parallel and offers attractive features for distributed memory multiprocessors. A combined r - h adaptive refinement procedure is also developed within the context of this hybrid substructuring method. Its basic features include an element-level error indicator that is based on a parametrized variational principle, a permanent load balancing, and an easily programmable interface gluing. The overall computational approach is applied to the structural analysis of the cabin of a launch vehicle on the iPSC/860. Numerical and performance results are reported and discussed in details. They demonstrate the potential of the methodology for the parallel solution of realistic structural mechanics problems.
Citation: Farhat, C., Felippa, C., and Militello, C., "A Hybrid Substructuring Method and an Adaptive Refinement Scheme for the Distributed Solution of Three-Dimensional Structural Problems," SAE Technical Paper 921082, 1992, https://doi.org/10.4271/921082. Download Citation
C. Farhat, C. Felippa, C. Militello
University of Colorado at Boulder
International Conference On Vehicle Structural Mechanics & Cae
Proceedings of the Eighth International Conference on Vehicle Structural Mechanics and Cae-P-258, SAE 1992 Transactions: Journal of Passenger Cars-V101-6
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