【摘要】 为解决地表起伏变化对地震波场的影响问题,本文提出将(x-z)域的曲网格映射成(ζ-η)域的矩形网格,推导出(ζ-η)域中的标量声波方程,根据推导出来的波动方程采用双平方根法将地表采集到的地震波场在(ζ-η)域中向下延拓,以解决地表起伏带来的负面影响.通过对模型的计算,该方法取得了一定的效果.更多还原

【Abstract】 In order to solve the effect of surface topography,this article presents the method of transforming the curved grids of(x-z)-coordinate system into rectangular grids of(ζ-η)-coordinate system.Then we derive the wave equation in the(ζ-η)-coordinate system.At last we continue the wave field downward using phase shift technique in the transformed coordinate system.Through calculating the model,we conclude that this method can achieve some good results.更多还原