基于线性插值和窄带技术的走时计算方法  

Travel-time computation based on linear interpolation and narrow-band technique

作　　者：孙章庆[1,2] 孙建国[1,2] 韩复兴[1,2] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026 [2]国土资源部应用地球物理综合解释理论开放实验室--波动理论与成像技术实验室,吉林长春130026

出　　处：《石油地球物理勘探》2009年第4期436-441,共6页Oil Geophysical Prospecting

基　　金：国家自然科学基金项目(40574052);国家重点基础研究发展计划课题(2007CB209603);国家自然科学基金重点项目(40437018)

摘　　要：为了解决现有走时计算方法中计算精度和计算效率很难兼顾的问题,本文基于线性插值和窄带技术提出了一种新的走时计算方法。该方法在实现过程中利用线性插值技术进行局部走时计算,利用窄带技术进行波前传播过程的模拟。数值分析表明其计算精度和效率均高于基于窄带技术的一阶、二阶精度有限差分法;通过对几个典型的复杂速度模型的数值运算证实,该方法切实可行,且对复杂速度模型具有很好的适应性。In order to solve the problem that it is difficult to deal with both the computational precision and efficiency in travel-time computation,the paper presented a new travel-time computation based on linear interpolation and narrow-band technique that uses linear interpolation to implement local travel-time computation and narrow-band technique to simulate the propagating process of wavefront. The numeric analysis showed that both computational precision and efficiency are higher than first-order and second-order finite-difference algorithm based narrow-band technique; it is proved the feasibility of the method by numeric computation of some typical complex velocity models and good adaptability for complex velocity model.

关 键 词：线性插值 窄带技术 走时计算 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术] O242.23[自动化与计算机技术—计算机科学与技术]