دورية أكاديمية
A hybrid scheme for seismic modelling based on Galerkin method
| العنوان: | A hybrid scheme for seismic modelling based on Galerkin method |
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| المؤلفون: | Liu, Tao, Hu, Tianyue, Sen, Mrinal K., Yang, Jinhua, Wang, Runqiu, Wei, Jianxin, Wang, Shangxu |
| المساهمون: | Liu, T (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China., Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China., Univ Texas Austin, Inst Geophys, Austin, TX 78758 USA., China Univ Petr, Coll Geophys & Informat Engn, Beijing 102249, Peoples R China. |
| المصدر: | SCI ; EI |
| بيانات النشر: | geophysical journal international |
| سنة النشر: | 2011 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Numerical solutions, Instability analysis, Numerical approximations and analysis, Computational seismology, Wave propagation, FINITE-DIFFERENCE METHOD, ACOUSTIC-WAVE EQUATION, SPECTRAL ELEMENT METHOD, IRREGULAR GRIDS, MOTION, PROPAGATION, SIMULATION, MIGRATION, ACCURACY, 2D |
| الوصف: | Purely numerical methods for modelling seismic wave propagation are now fairly popular. In this paper, we report on the development of a hybrid finite element-finite difference method. Our method first employs semi-discretization of the finite element method in a part of the spatial domain (in the z-direction for 2-D situation) to obtain a wave equation in weak form, and then uses the finite difference method to solve it. This offers significant advantages in applying non-uniform grids with improved accuracy. To improve the computational efficiency, we introduce the spectral element method to replace the traditional finite element method, which leads to a diagonal mass matrix with sufficient accuracy. After that, we carry out detailed analyses of the dispersion behaviours for both uniform and non-uniform cases; the dispersion curves demonstrate high precision of our method in numerical modelling, especially in dealing with non-uniform grids. Some examples are presented to demonstrate performance of this method and confirm the analytic results. ; Geochemistry & Geophysics ; SCI(E) ; EI ; 0 ; ARTICLE ; 3 ; 1165-1178 ; 186 |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 0956-540X |
| العلاقة: | GEOPHYSICAL JOURNAL INTERNATIONAL.2011,186,(3),1165-1178.; 901842; http://hdl.handle.net/20.500.11897/311204Test; WOS:000293998000021 |
| DOI: | 10.1111/j.1365-246X.2011.05094.x |
| الإتاحة: | https://doi.org/20.500.11897/311204Test https://doi.org/10.1111/j.1365-246X.2011.05094.xTest https://hdl.handle.net/20.500.11897/311204Test |
| رقم الانضمام: | edsbas.70412EF1 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 0956540X |
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| DOI: | 10.1111/j.1365-246X.2011.05094.x |