Seismic Response Analysis of Nuclear Pressure Vessel Model with ADVENTRUE System on the Earth Simulator

Abstract

Abstract 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 over 100 million Degrees Of Freedom (DOF) mesh. The one of main process modules for solid analy-sis, named ADVENTURE_Solid, is based the hierarchical domain decomposition parallel algorithm and employs the balancing domain decomposition as a solution technique for linearized equations. The ADVEN-TURE_Solid has been successfully implemented on a single PC, PC clusters and MPPs with high parallel performances. In order to realize a virtual demonstration test, the solid module is implemented on the Earth Simulator with minor modification for a vector processor and applied for an implicit dynamic elastic analysis such as seismic response of a precise nuclear pressure vessel model of 35 million DOF mesh with 128 nodes (1,024 Processing Elements), and succeeded in solving 300 unsteady steps in about 4.3 hours. Furthermore, the system is applied for a static elastic analysis of a nuclear pressure vessel model of 100 million DOF mesh in about 8.5 minutes on the 256 nodes (2,048 PEs), and archived 5.08 TFLOPS, which is 31.75 % of the peak performance. and succeeded in solving 300 unsteady steps in about 4.3 hours. Furthermore, the system is applied for a static elastic analysis of a nuclear pressure vessel model of 100 million DOF mesh in about 8.5 minutes on the 256 nodes (2,048 PEs), and archived 5.08 TFLOPS, which is 31.75 % of the peak performance.