基于高斯波束的2.5维数值模拟  

2.5-Dimensional Numerical Simulation Based on Gaussian Beams

作　　者：栗学磊[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《吉林大学学报（地球科学版）》2010年第S1期51-54,共4页Journal of Jilin University：Earth Science Edition

摘　　要：由于具有计算速度快的优点,射线追踪方法在地震勘探中一直起着非常重要的作用。V.Cerveny在上世纪80年代初提出了高斯波束方法,该方法同时考虑了波的动力学和运动学特征,并且无需两点试射追踪,因而运算速度快且精度高;另外高斯波束对异常区波场有较好的效果,比如焦散点、阴影区、临界和超临界反射。研究的主要内容是2.5维简单结构模型的高斯波束法。利用2.5维模型进行数值计算相当于在二维空间内计算三维问题,可以节约很大一部分计算。Because of its rapid computing speed,ray-tracing method have always played a very important role in seismic exploration.V.Cerveny made Gaussian beam method in the early of 1980s.Gaussian beam method takes into account the dynamics and kinematics of seismic wave,and do not need test-fire tracing,and thus rapid computing speed and high accuracy.In addition,Gaussian beams has a good effect for the wave field of anomalous areas,such as caustic point,the shadow zone,the critical reflection.Studied in this paper the main contents of is 2.5-dimensional Gaussian beam method for some simple structural models.The use of 2.5-dimensional numerical model is equivalent to the calculation in two-dimensional space for three-dimensional problem,and we can save a large part of the calculation.

关 键 词：高斯波束 2.5维简单结构模型 数值模拟 

分 类 号：P631.4[天文地球—地质矿产勘探]