弹性高斯束偏移PS成像降维高效计算方法

摘要

给出了2D弹性高斯束偏移公式推导,该偏移实现了准确的波型分离,压制多波之间串扰噪音.将声波高斯束偏移的降维高效算法推广到弹性高斯束偏移PS成像,通过重新设计中心点慢度分量和偏移距慢度分量,改进了该降维高效算法,实现了PS成像的降维高效计算.%The derivation of 2D elastic Gaussian beam migration is provided,in which the wave decomposition is completed accurately,and the crosstalk is eliminated effectively.Conventional efficient computing method of acoustic Gaussian beam migration is developed into PS imaging of elastic Gaussian beam migration.The authors propose a modified efficient computing method by rebuilding the expressions of mid-point slowness and offset slowness,which is suitable for PS imaging.