Simulation of multistage excavation based on a 3D spectral-element method

Authors:
Hom Nath Gharti;Volker Oye;Dimitri Komatitsch;Jeroen Tromp
Affiliations:
NORSAR, Gunnar Randers vei 15, N-2007 Kjeller, Norway and Department of Geosciences, Oslo University, Sem Sælands vei 1, N-0371 Oslo, Norway;NORSAR, Gunnar Randers vei 15, N-2007 Kjeller, Norway;LMA, CNRS UPR 7051, Aix-Marseille University, Centrale Marseille, 13402 Marseille Cedex 20, France;Department of Geosciences and Program in Applied & Computational Mathematics, Princeton University, Princeton, NJ, USA
Venue:
Computers and Structures
Year:
2012

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Abstract

We implement a 3D spectral-element method for multistage excavation problems. To simulate excavation in elastoplastic soils, we employ a Mohr-Coulomb yield criterion using an initial strain method. We parallelize the software based on non-overlapping domain decomposition using MPI. We verify the uniqueness principle for multistage excavation in linear elastic materials. We validate our serial and parallel programs, and illustrate several examples of multistage excavation in elastoplastic materials. Finally, we apply our software to a model of the Pyhasalmi ore mine in Finland. Strong-scaling performance tests involving multistage excavation show that the parallel program performs reasonably well for large-scale problems.