合成三维横向非均匀介质远震体波接收函数的Maslov方法

三维横向非均匀介质远震体波接收函数的合成算法对于三维介质远震体波接收函数研究至关重要．本文发展了基于Ｍａｓｌｏｖ理论的横向非均匀介质接收函数合成算法，针对远震体波接收函数计算的特点，利用遗传算法完成三维动力学射线追踪，并采用递归算法组织射线的追踪过程，从而在保证追踪精度的同时提高了射线追踪的效率，并可完全避免传统射线追踪过程中的射线编码问题．正演计算结果表明，此法是一种高效、实用的三维横向非均匀介质接收函数计算方法．

LITHOSPHERIC RECEIVER FUNCTION IN 3-D LATERALLY INHOMOGENEOUS MEDIA USING MASLOV ASYMPTOTIC THEORY

In this paper a new method is proposed for calculating the lithospheric receiverfunction in 3-D laterally inhomogeneous media by using the Maslov asymptotic theory.In our method the dynamic ray tracing is realized in terms of the genetic algorithm,and the ray tracing process is organized as a recursive process to avoid the artificialray coding in traditional ray methods.Thus,not only the accuracy of the ray tracingis improved in our method, but also the efficiency is enhanced. Our computationalresults demonstrate that our method is a high efficient algorithm for calculating the receiver function in laterally inhomogeneous media.