大规模数值计算的层分布物理参数研究
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摘要
随着计算机技术的飞速发展和地震台网的建设对大城市的地震动数值模拟变成可能。应用地质,地貌以及地球物理勘探等资料建立的三维层结构是保证地震动计算准确性的基础。提出并论证了关于三维层分布模型的建模思路和相关数据处理方法。据此所建立的三维模型符合研究目标区的实际情况,同时,所提供的方法还便于模型的修改和升级。
The 3D velocity structural model built by using geomorphic and geologic exploration data is important for evaluating strong ground motion. This paper presents a method study on modeling velocity structures. Modeling codes and developed tools based on multi -function software was used to analyze the mass data and information. The B-spline function is proposed to produce the given data points in order to optimize the model. The proposed model is suitable for 3D finite difference simulation for evaluating near -fault strong ground motions from future earthquakes. Compared to other methods,the model is easier to be modified and adjusted,and it is also very significant in the relative fields of earthquake damage mitigation.
The 3D velocity structural model built by using geomorphic and geologic exploration data is important for evaluating strong ground motion. This paper presents a method study on modeling velocity structures. Modeling codes and developed tools based on multi -function software was used to analyze the mass data and information. The B-spline function is proposed to produce the given data points in order to optimize the model. The proposed model is suitable for 3D finite difference simulation for evaluating near -fault strong ground motions from future earthquakes. Compared to other methods,the model is easier to be modified and adjusted,and it is also very significant in the relative fields of earthquake damage mitigation.
引文
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[2]Boore,D.M.Stochastic simulation of high-frequency ground motion based on seismological models of thradiated spectra[J].Bulletin Seismological Society of America,1983,73:1865-1894
[3]Aki,K.,Chen,X.F.,and Zeng,Y.H.Three-dimensional vector wavefield imaging of seismic sources in arbitrarily anisotropic and heterogeneous elastic media[J].Bulletin Seismological Society of America,1986,76:1479-1483.
[4]Irikura,K.Prediction of strong acceleration motion using empirical Green’s function[C].Proc.of7th Japan Earthquake Engineer Symposium,1986:151-156.
[5]Iwata,T.,Kawase,H.,Sekiguchi,H.,Matsushima,S.and Irikura K.Strong motion data and geological structures distributed for simultaneous simulation for Kobe[A].Special Volume on Simultaneous Simulation for Kobe[C],2nd Int.Symp.on the ESG,Yokohama,Japan,1998,SS02:1-12.
[6]陈晓非.强地面运动模拟与震害预测研究进展[A].中国地球物理第二十一届年会论文集[C],2005
[7]赵伯明.国家“十五”重大科学工程《城市活动断层探测与地震危险性评价》基础研究项目《不同断层发育城市的强地震动评价研究》报告[R].中国地震局,2007.
[8]廖玉麟.概率论与数理统计[M].上海:复旦大学出版社,1994.
[9]Takao,K.,Zhao,B.,Miyakoshi,K.,and Irikura,K.Modeling of3D Basin Structures for Seismic Wave Simulations Based on Available Information on the Target Area:Case Study of the Osaka Basin[J].Japan,Bull.Seismo.Soc.Am.,2004,94:1353-1368.
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