高斯束方法及其应用

The Gaussian beam method and its application

高斯束方法是在动力学射线追踪和旁轴近似方法基础上发展而来的.高斯束是波动方程在特定射线附近的高频渐近解.本文介绍了高斯束方法及其与射线方法相比的优越性,以及高斯束在地震波场正演模拟以及偏移方面的应用,并提出了实现高斯束偏移的一种新方法.

Gaussian beam method is based on the dynamic raytracing and paraxial approximation method. Gaussian beam is the asymptotic solution of wave equation concentred at the central ray. In this article the Gaussian beam method and its advantage to raytracing method is introduced. The application of Gaussian beam method in wave field simulation and migration is discussed, and a new method to implement Gaussian beam migration is put forward.