摘要
In order to study propagation characteristics of the Rayleigh wave in transverse non-homogeneous media,the vertical low-velocity zone models with different width and depth were simulated by Rayleigh wave filed forward modeling according to the staggered grid high-order finite difference method.The numerical results show that surface wave can produce reflection and transmission when it meet transverse non-homogeneous media,and then the location and the width of the low-velocity zone can be determined from the wave field recording.The depth of vertical low-velocity zone will directly affect whether to produce high order surface wave,with the increase of the width of the exposed surface of the vertical low-velocity zone,The energy of high order surface wave is gradually strengthened.