Development of the Next-generation Computational Solid Mechanics Simulator for a Virtual Demonstration Test Project Representative

We have been developing an advanced general purpose computational mechanics system, named ADVENTURE, which is designed to be able to analyze a three dimensional finite element model of arbitrary shape with a 10-100 million degrees of freedom (DOF) mesh. Module based architecture of the system with standardized I/O format and libraries are developed and employed to attain flexibility, portability, extensibility and maintainability of the whole system. The one of main process modules for solid analysis, named ADVENTURE_Solid, is based on the hierarchical domain decomposition parallel algorithm and employs the balancing domain decomposition as a solution technique for linearized equations. The ADVENTURE_Solid has been successfully implemented on the Earth Simulator consisting of 256 nodes, i.e. 2,048 arithmetic processors (APs), and applied for an elastostatic analysis of a nuclear pressure vessel model of 100 million DOF mesh with 5.08 TFLOPS, which is 31.75 % of the peak performance. In this report, the parallel performance of the solid analysis module, which is programmed by the flat MPI parallelization, is investigated. Furthermore, the solid module is demonstrated an implicit dynamic elastic analysis of a model of 100 million DOF mesh on the 256 nodes (2,048 APs), and succeeded in solving 5 unsteady steps in about 2.4 minutes. Besides, it succeeds in solving an elastostatic problem of a historical building pantheon model of 140 million DOF mesh in about 10 minutes on the 256 nodes (2,048 APs).