维普中文期刊产品整合服务

Modeling of elastic wave propagation on a curved free surface using an improved finite-difference algorithm

查看全文 作　　者：WANG Xiuming1,3 & ZHANG Hailan2 1. CSIRO Petroleum, ARRC, PO BOX 1130, Technology Park, Bentley, WA 6102, Australia;2. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China;3. Present address: Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China 高影响力作者 出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2004年第47卷第5期,共16页高影响力期刊 基　　金：The first author wishes to thank Prof.John McDonald in Curtin University of Technology of Australia for reviewing this paper.This work was partly supported by the National Natural Science Foundation of China(Grant No.10134020). 摘　　要：Based on existing direct and imaging methods of a staggered finite-difference scheme, an improved algorithm for staggered finite-difference is proposed to implement rugged topographic free boundary conditions. This method assumes that the free surface can be implemented with horizontal and vertical free surface segments and their corners; the free surface passes through the grid points of shear stress components, instead of the normal stress components. Imaging is carried out for stress components in both horizontal and vertical directions, thus increasing the accuracy. To update particle- velocities, imaging and updating are first performed in the horizontal direction, and then in the vertical direction. The numerical results for elastic flat horizontal free surface with the imaging method and those for flat free surfaces of various slope angles with the proposed method are compared, and are shown to be in good agreement. The advantage of the proposed method is that only the stresses are dealt with in implementing the free surface into the staggered algorithm, which improves computation efficiency. 关 键 词：ELASTIC WAVE simulation, curved free surface, staggered finite-difference, ALGORITHM stability.
相关文献

参考文献(10)

引证文献(11)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费