Global SH-wavefield calculation for a two-dimensional whole-Earth model with the parallel hybrid PSM/FDM algorithm
Global SH-wavefield calculation for a two-dimensional whole-Earth model with the parallel hybrid PSM/FDM algorithm
复制标题
利用并行混合 PSM/FDM 算法计算二维全地球模型的全局 SH 波场
DOI:
10.1007/s11589-014-0085-9
复制
发表时间:
2014-05
影响因子:
1.2
通讯作者:
Xianbing Zhang
中科院分区:
文献类型:
--
作者:
Yanbin Wang;Yang Luo;Yanfang Qin;Xianbing Zhang
We present a parallel hybrid algorithm based on pseudospectral method (PSM) and finite difference method (FDM) for two-dimensional (2-D) global SH-wavefield simulation. The whole-Earth model is taken as a cross section of spherical Earth, and corresponding wave equations are defined in 2-D cylindrical coordinates. Spatial derivatives in the wave equations are approximated with efficient and high accuracy PSM in the lateral and high-order FDM in the radial direction on staggered grids. This algorithm allows us to divide the whole-Earth into sub-domains in radial direction and implement efficient parallel computing on PC cluster, while retains high accuracy and efficiency of PSM in lateral direction. A transformation of moment tensor between 3-D spherical Earth and our 2-D model was proposed to give corresponding moment tensor components used in 2-D modeling. Comparison of modeling results with those obtained by direct solution method shows very good accuracy of our algorithm. We also demonstrate its feasibility with a lateral heterogeneous whole-Earth model with localized velocity perturbation.
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DOI:
--
发表时间:
2002
期刊:
--
影响因子:
--
作者:
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通讯作者:
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影响因子:
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作者:
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