基于FrontISTR的大规模地震数值模拟软件的研发  

The Numerical Simulation Software for Large Scale Earthquakes Based on FrontISTR

作　　者：董勤喜 DONG Qinxi(Edu Science Research Institute,Kawasaki City 214-0033 Japan)

机构地区：[1]教育科学研究所

出　　处：《西华大学学报（自然科学版）》2018年第1期9-16,共8页Journal of Xihua University:Natural Science Edition

摘　　要：基于开源并行有限元程序开发平台Front ISTR,研制了大规模地震数值模拟的计算软件Edu S/Front ISTR。文章介绍了该计算软件模拟地震断层及震源的方法,并将数值模拟的地壳变动和地震波传播的时序曲线同理论解进行比较,得到同理论解一致的结果。该软件嵌入日本全土地震灾害非均匀的地下结构(J-SHIS)和松原地震波速度模型融合的数据库,同时能够考虑地表地形及海底的形状。以日本东北部海域发生的Mw9.0特级大地震为例,用Edu S/Front ISTR软件进行了地壳变动和地震波传播数值模拟,准确地再现了新泻—神户地区的应变集中现象,精确展现了大地震发生后地震波的传播过程,其结果与观测结果良好吻合。该数值模拟计算程序可为地震发生后的震源附近区域提供有效的地震波数据,有助于灾后工程结构的安全评估。Software EduS/FrontISTR has been developed for the numerical simulation of crustal deformation and seismic wave propagation using the parallel platform of FrontISTR.The parallel computing of finite element method and fault model were adopted in the software for the numerical simulation of large scale earthquakes.The computed results are well agreed with theoretical results or observations.Taking the Pacific Ocean offshore earthquake in Northeast Japan as an example,a numerical simulation of large scale earthquake has been carried out by EduS/FrontISTR based on the Japan Seismic Hazard Information Station(J-SHIS)and the seismic wave velocity model of Matsubara.The phenomenon of the concentrated strain in the Niigata-Kobe Tectonic Zone(NKTZ)of northeastern Japan is well reproduced by the computed results and the seismic wave propagation is also well reproduced by the simulated digital database of 3D seismic velocity.These results are good agreement with the observation.Therefore,seismic wave data can be obtained by the computational software EduS/FrontISTR.This will be well suitable for safety assessment of the engineering structures after the earthquake.

关 键 词：地震 断层模型 震源 并行计算 有限元法 数值模拟 地壳变动 地震波传播 

分 类 号：P315[天文地球—地震学] O246[天文地球—固体地球物理学]