摘要
从二维非均匀介质中的声波方程出发,采用三维点源作为震源,提出了一种求解井间2.5维逆散射问题的迭代算法.其中,入射场与格林函数皆采用Maslov渐近理论予以计算,以避免非均匀介质中出现的焦散现象.数值模拟结果表明,本文提出的算法是有效的.
An iterative algorithm of solving 2.5D inver e scattering problem is proposed from the acoustical wave equation in two dimensional inhomugeneous media, in which 30 pointcources are use as the detecting tools and incident field and Green function are calculated by Maslov asymptotic theory to avoid the caustics in inhomcgeneous media and raise precision of evaluating wave field in inhomogeneous media. In the paper, numerical methods and tests are studied. The results show that algorithm proposed by us is effective and makes progress towards the practice.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第6期753-761,共9页
Chinese Journal of Geophysics
基金
国家自然科学基金
关键词
震源
井
散射
迭代分析
Tomography, 2.5D inverse scattering, Cross-holes, Maslov methods, Numerical methods.
