Improved free-surface expression for frequency-domain elastic optimal mixed-grid modeling
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- 作者：Jian Caoa ; b ; caojian@mail.iggcas.ac.cn" class="auth_mail" title="E-mail the corresponding author ; Jing-Bo Chena ; chenjb@mail.iggcas.ac.cn" class="auth_mail" title="E-mail the corresponding author ; Meng-Xue Daia ; b ; daimengxue@mail.iggcas.ac.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Elastic wave modeling ; Free-surface ; Frequency-domain ; Staggered-grid ; Mixed-grid ; Condition number
- 刊名：Journal of Applied Geophysics
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：130
- 期：Complete
- 页码：71-80
- 全文大小：1696 K
文摘
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An improved expression for free-surface condition in frequency-domain is proposed.
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We integrate the physical parameter-modified method with the elastic optimal mixed-grid modeling scheme.
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Accuracy tests show that it can provide more accurate and stable solution with only 4 grid points per minimum wavelength.
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The analysis on condition numbers demonstrates the substantial improvement of this expression.