An efficient approach of the pseudospectral method for modelling of geometrically symmetric seismic wavefield
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- Takenaka Hiroshi
- Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University
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- Wang Yanbin
- Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University
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- Furumura Takashi
- Faculty of Education, Hokkaido University of Education
書誌事項
- タイトル別名
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- Efficient approach of the pseudospectral method for modelling of geometrically symmetric seismic wavefield
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説明
The pseudospectral method is a high-accuracy numerical modelling technique that requires less computer memory and computation time than the traditional techniques such as the finite-difference method. These advantages of the pseudospectral method have enabled us to practically apply this method to modelling realistic problems that have complex structure and source models. However, a major drawback of such numerical schemes for discrete grid models is that even for rather a simple structural model they require as much computational requirements (e.g. computation time and memory) as for an entirely complex structural model with the same size of the simple one. We actually need to employ idealised simple models, such as a model with geometrical symmetry, to investigate basic phenomena of seismic waves, to develop new techniques, or to choose optimal values of some computational parameters for more complex modelling. In this paper we propose an efficient approach of an economical pseudospectral method for calculation of wavefields in models symmetric with respect to a vertical plane or two orthogonal vertical planes. Using this approach, the wavefields only need to be computed in a half or quarter domain of the models, so that the computer memory and computation time can be reduced ideally by half or quarter, respectively, as compared with the calculation of the entire models.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 51 (2), 73-79, 1999
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390001206509039360
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- NII論文ID
- 10003737164
- 130003955977
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 4681658
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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