摘要
P-SV转换波传播路径是非对称性,而转换波的叠加需要抽取真正的共转换波点道集。不同于水平界面,倾斜界面的转换波的转换点坐标轨迹还要取决于界面的倾角和倾向,而且难于用精确的解析表达式表示。本文从Snell定律出发用牛顿迭代法导出确定倾斜界面转换波点的迭代方程,通过计算表明牛顿迭代算法速度快而且非常准确。
The propagation path of P-SV converted wave is non -symmetric, but the stack of converted wave requires real common conversion point gathering. Different from horizontal interface, coordinates of the conversion of converted waves depend on both dip angle and dip direction of a dipping interface. Moreover, it is difficult to use precise analytic for-mula to determine the locus of the conversion points. In this paper, based on snell law, we derive an iteration equation which is used to calculate conversion points in the case of dipping interface using the Newton iteration method. Calculation results show that the calculation is rapid and the conversion points are well located.
出处
《工程地球物理学报》
2009年第2期167-170,共4页
Chinese Journal of Engineering Geophysics
关键词
倾斜界面
转换波
牛顿迭代
转换点
dipping interface
converted wave
Newton iteration
conversion point
