三维结构下全路径迭代射线追踪方法  

WHOLE-PATH ITERATIVE RAY TRACING IN 3D MEDIA

作　　者：高尔根[1] 席道瑛[1] 曾昭发[2] 

机构地区：[1]中国科学技术大学地球与空间科学系,合肥230026 [2]长春科技大学应用地球物理系,长春130026

出　　处：《岩石力学与工程学报》2002年第11期1610-1614,共5页Chinese Journal of Rock Mechanics and Engineering

摘　　要：基于Fermat原理对三维任意界面情况下的2点间射线追踪问题进行了研究。通过采用一阶Taylor不完全展开等办法,给出了三维情况下全路径迭代射线追踪算法的计算格式,并在几个三维介质模型上进行了射线追踪模拟计算。计算结果表明:它的计算速度相当快,且其计算精度可以根据需要达到任意要求,为三维结构下地震偏移和层析成像提供了一种可行的射线追踪方法。Based on Fermats principle,two-point ray tracing is studied on three-dimensional arbitrary interface. By means of one order Taylor's incompletion expansion,the algorithm of whole-path iterative ray tracing in three dimensional media is obtained. The numerical tests based on this method in three dimensional media show that this algorithm is fast in random interface velocity distribution and the results are accurate enough. At the mean time,its precision can be controlled according to requirement of ray-traci...

关 键 词：Fermat原理 射线追踪 射线路径 地震偏移 层析成像 

分 类 号：P631.4[天文地球—地质矿产勘探]