摘要
为研究近地表波场特征,特别是瑞雷面波的波场特征,即瑞雷面波的形成机理及传播规律,根据弹性波方程,采用交错网格有限差分算法对基于浅层各向同性弹性介质模型的近地表波场进行了模拟和分析。利用对均匀半空间模型的模拟,分析了瑞雷面波能量在水平和垂直传播方向上的衰减情况以及震源埋深对面波能量的影响;利用对不同均匀层状介质模型的模拟,分析了瑞雷面波的基本特性及近地表构造对波场的影响。
In order to give a better research for the wave field characteristic of the nearsurface,esp.the wave field on the Rayleigh wave,namely the generation mechanism and propagation rule of Rayleigh wave.The paper applies the higher-order staggered grids finite difference of elastic wave equation to simulating and analyzing the near-surface wave field based on shallow isotropic media model.Through simulating the half space homogeneous media model,it analyzes the situation of Rayleigh wave attenuation in a horizontal and vertical propagation directions.Through simulating the different layered homogeneous media models,it analyzes the basic property of the Rayleigh wave and the influence of the near-surface structure for wave field.
出处
《工程地球物理学报》
2012年第6期680-686,共7页
Chinese Journal of Engineering Geophysics
关键词
近地表
弹性介质模型
交错网格
瑞雷面波
near-surface
elastic media model
staggered grids
Rayleigh wave
