| 弹性波正演模拟中改进的非分裂式PML实现方法(英文) |
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| 引用本文： | 秦臻,卢明辉,郑晓东,姚姚,张才,宋建勇.弹性波正演模拟中改进的非分裂式PML实现方法(英文)[J].应用地球物理,2009,6(2):113-121. |
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| 作者姓名： | 秦臻 卢明辉 郑晓东 姚姚 张才 宋建勇 |
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| 作者单位： | Qin Zhen(Research Institute of Petroleum Exploration & Development,Beijing 100083,China;Institute of Geophysics & Geomatics,China University of Geosciences,Wuhan 430074,China);Lu Minghui,Zheng Xiaodong,Zhang Cai(Research Institute of Petroleum Exploration & Development,Beijing 100083,China);Yao Yao(Institute of Geophysics & Geomatics,China University of Geosciences,Wuhan 430074,China);Song Jianyong(Faculty of Resource & Information,China University of Petroleum,Beijing 102249,China)
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| 基金项目： | sponsored by the Chinese National Development and Reform Commission(No.[2005]2372); the Innovative Technological Research Foundation of PetroChina Company Limited(No.060511-1-3) |
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| 摘 要： | 在弹性波有限差分正演模拟中,吸收边界条件常用来吸收截断边界处引入的不期望边界反射,其中完全匹配层(PML)吸收边界条件被认为是目前最理想的吸收边界条件。但是PML吸收边界条件的传统实现却存在着很大不足:全局分裂式PML吸收边界条件实现简单但是需要占用太多内存;局部分裂式PML吸收边界条件需要考虑多个边界和角点区域,编程实现非常复杂;非分裂式PML吸收边界条件由于涉及卷积运算,计算量很大。本文基于非分裂式PML吸收边界条件,结合复频移伸展函数,提出了一种新的数值实现方法,其计算方程简单、占用内存小、编程实现容易,是对PML介质理论数值实现的改进和完善。
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| 关 键 词： | 吸收边界条件 弹性波 计算机内存 完全匹配层 建模 正演模拟 截断边界 延伸功能 |
| 收稿时间： | 3 March 2006 |
The implementation of an improved NPML absorbing boundary condition in elastic wave modeling |
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| Zhen Qin,Minghui Lu,Xiaodong Zheng,Yao Yao,Cai Zhang,Jianyong Song.The implementation of an improved NPML absorbing boundary condition in elastic wave modeling[J].Applied Geophysics,2009,6(2):113-121. |
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| Authors: | Zhen Qin Minghui Lu Xiaodong Zheng Yao Yao Cai Zhang Jianyong Song |
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| Institution: | (1) Research Institute of Petroleum Exploration & Development, Beijing, 100083, China;(2) Institute of Geophysics & Geomatics, China University of Geosciences, Wuhan, 430074, China;(3) Faculty of Resource & Information, China University of Petroleum, Beijing, 102249, China |
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| Abstract: | In elastic wave forward modeling, absorbing boundary conditions (ABC) are used to mitigate undesired reflections from the model truncation boundaries. The perfectly matched layer (PML) has proved to be the best available ABC. However, the traditional splitting PML (SPML) ABC has some serious disadvantages: for example, global SPML ABCs require much more computing memory, although the implementation is easy. The implementation of local SPML ABCs also has some difficulties, since edges and comers must be considered. The traditional non-splitting perfectly matched layer (NPML) ABC has complex computation because of the convolution. In this paper, based on non-splitting perfectly matched layer (NPML) ABCs combined with the complex frequency-shifted stretching function (CFS), we introduce a novel numerical implementation method for PML absorbing boundary conditions with simple calculation equations, small memory requirement, and easy programming. |
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| Keywords: | PML absorbing boundary condition non-splitting forward modeling |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
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