日本地球惑星科学連合2022年大会

講演情報

[J] ポスター発表

セッション記号 S (固体地球科学) » S-TT 計測技術・研究手法

[S-TT41] ハイパフォーマンスコンピューティングが拓く固体地球科学の未来

2022年5月30日(月) 11:00 〜 13:00 オンラインポスターZoom会場 (25) (Ch.25)

コンビーナ:堀 高峰(独立行政法人海洋研究開発機構・地震津波海域観測研究開発センター)、コンビーナ:八木 勇治(国立大学法人 筑波大学大学院 生命環境系)、汐見 勝彦(国立研究開発法人防災科学技術研究所)、座長:堀 高峰(国立研究開発法人海洋研究開発機構)

11:00 〜 13:00

[STT41-P05] Development and application of large scale numerical simulations for earthquake generation, ground motion and non-linear soil amplification

*堀 高峰1 (1.国立研究開発法人海洋研究開発機構)

キーワード:大規模数値計算、地震ハザード、ソルバー

Quantitative evaluation of earthquake hazards is necessary to prepare for earthquakes occurring directly beneath the Tokyo metropolitan area and along the Nankai Trough. In this study, we will construct a computing platform to carry out such evaluations, which include earthquake generation, seismic wave propagation and nonlinear soil response, by using extremely large-scale computations on "Fugaku" and implement it in the process of national evaluations of seismic hazards. The components of the computing platform have been accelerated to enable more efficient large-scale numerical analysis on "Fugaku". We have developed algorithms of matrix-vector product calculation, which is required for ultra-high-detailed, ultra-large-scale finite element seismic response analysis of important structures, which is designed for the Arm SVE architecture that comprises "Fugaku". The developed solver achieved 25.45-fold speedup from the state of the art solver on Fugaku and attained weak scaling efficiency of 93.7% from 9.391 billion DOF@578 computer nodes to 1.201 tril- lion DOF@73,984 computer nodes on performance measurement problems (Ichimura, Fujita, et al., 2022). As a preparation for the national evaluations of seismic hazards, we performed a test calculation of long-period seismic motion in the Kanto region for the Sagami Trough earthquake using "Fugaku".