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地震波有限差分数值模拟框架下的起伏地表处理方法综述
The state-of-the-art in numerical modeling including surface topography with finite-difference method
【摘要】 本文查阅了近30年来国内外关于有限差分方法模拟近地表复杂介质方面的文献,分析了在有限差分法框架下复杂地表地形起伏问题的处理及实现方法.总结了地震波有限差分数值模拟方面的成果.复杂地表类型很多,对地震资料的影响程度也不尽相同,要想完全描述近地表影响因素是不可能的,而关键的问题就是自由边界条件方程的处理.所有处理及实现方法中不外两种:直接法(局部)和间接(全局)法.文中列出的方法,各有特点.我们的目的是寻找合适的方法解决适合的问题.
【Abstract】 As a tool for understanding the regulation f wave propagation in complex media and examining the effects of different kinds of methods,seismic numerical modeling plays an important role in modern geophysical prospecting.This paper briefly introduced several modeling methods including surface topography with finite-difference in recent 30 years.Two implementation methods are proposed: derect method which includes rotated coordinate method,vacuum method and general imaging method and indirect method.Our aim is to find the suitable method to solve the adapted questions.
【Key words】 finite-difference； free surface； direct method； indirect method； mapping surface topography；
- 【文献出处】 地球物理学进展 ,Progress in Geophysics , 编辑部邮箱 ,2008年01期
- 【分类号】P631.4
- 【被引频次】33
- 【下载频次】620