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Weighted-Averaging Finite-Element Method for Scalar Wave Equation in the Frequency Domain
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Min, Dong-Joo | - |
dc.contributor.author | Yoo, Hai Soo | - |
dc.contributor.author | Shin, Changsoo | - |
dc.contributor.author | Hyun, Hye-Ja | - |
dc.contributor.author | Suh, Jung Hee | - |
dc.date.accessioned | 2009-08-04 | - |
dc.date.available | 2009-08-04 | - |
dc.date.issued | 2002 | - |
dc.identifier.citation | Journal of Seismic Exploration, 11: 197-222 | en |
dc.identifier.issn | 0963-0651 | - |
dc.identifier.uri | http://www.geophysical-press.com | - |
dc.identifier.uri | https://hdl.handle.net/10371/6126 | - |
dc.description.abstract | We develop a new weighted-averaging finite-element method which can be applied to
generate synthetic seismograms using scalar wave equation in the frequency domain. Our method introducest hree kinds of supplementarye lements etsi n addition to a basic elements et which is used in standard finite-element method. By constructing global stiffness and mass matrices for four kinds of element sets and then averaging them with weighting coefficients, we obtain a,new global stiffness and mass matrix. With the optimal weighting coefficients minimizing grid dispersion and grid anisotropy, we can reduce the number of grid points required per wavelength to 4 for a l% tpper limit of error. This reduction of the number of grid points, achieved by using the weighted-averaging finite-element method, makes it possible to reduce computer memory to 32.7Vo of that for the eclectic finite-element method. We confirm the accuracy of our weighted-averaging finite-element method through accuracy analyses for a homogeneous and a horizontal-layer model. By synthetic data example, we reconfirm that our method is more efficient for simulating a geological model than previousf inite-element methods | en |
dc.description.sponsorship | This work was financially supported by grant No. R05-2000-00003 from the Basic Research Program of the Korea Science & Engineering Foundation, grant No. PM10300 from Korea Ocean Research & Development Institute, National Laboratory Project of Ministry of Science and Technology, and Brain Korea 21 project of the Ministry of Education. | en |
dc.language.iso | en | en |
dc.publisher | Geophysical Press | en |
dc.subject | weighted-averaging finite-element method | en |
dc.subject | scalar wave equation | en |
dc.subject | frequency domain | en |
dc.subject | weighting coefficient | en |
dc.subject | synthetic seismograms | en |
dc.title | Weighted-Averaging Finite-Element Method for Scalar Wave Equation in the Frequency Domain | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 민동주 | - |
dc.contributor.AlternativeAuthor | 유해수 | - |
dc.contributor.AlternativeAuthor | 신창수 | - |
dc.contributor.AlternativeAuthor | 현혜자 | - |
dc.contributor.AlternativeAuthor | 서정희 | - |
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