基于非线性插值的地震波旅行时计算  

COMPUTATION OF SEISMIC TRAVELTIME BASED ON NONLINEAR INTERPOLATION

作　　者：彭直兴[1] 张春红[1] 周熙襄[1] 钟本善[1] 

机构地区：[1]成都理工大学,成都610059

出　　处：《物探化探计算技术》2006年第1期10-13,1,共4页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：地震波旅行时计算是射线追踪方法的核心问题,其精度直接影响着路径的精度和正演模拟的准确程度。在简要分析目前最典型的几种地震波旅行时计算方法(如有限差分法、线性插值法等)局限性的基础上,提出了一种基于非线性插值的地震波旅行时计算方法,并推导了其计算公式。通过模型的对比试算,不仅验证了所提出的旅行时非线性插值算法的正确性,而且还表明本算法计算旅行时的精度,比Asakawa[5]提出的线性插值算法的精度更高。The computation of seismic traveltime is a core matter of ray-tracing method,and its accuracy affects the accuracy of the path and the accurate degree of the forward problem of seismic ray simulation.Having analysed the localization of several typical methods for traveltime computation(finite difference method,linear interpolation method and so on) in briefly,authors put forward a method for traveltime computation based on nonlinear interpolation,and deduced its calculation formula.The contrast that passed the model computation,not only verified the correctness of the algorithm,but also showed that the computation accuracy of the algorithm is higher than the that based on linear interpolation,being put forward by Asakawa.

关 键 词：地震波旅行时 线性插值 非线性插值 计算精度 

分 类 号：P631.4[天文地球—地质矿产勘探]