振动目标产生的瑞雷波的识别方法研究

Study on the Recognition Method of Rayleigh Wave Produced by Vibration Target

在地下介质模型参数已知的情况下,利用二维弹性波动方程在网格中离散化的方法来数值模拟出地震波在二维各向同性介质中的运动规律,通过地震波场正演模拟的同时可以观察到地表附近的瑞雷面波运动传播情况,通过在自由表面分离出的径向和垂直方向的质点运动曲线,可以观测并区分出初至波和瑞雷波,并得出瑞雷波传播速度、传播形式等传播特点。

In the case of the known model parameters of underground medium, seismic wave field is generated by numerical simulation for target excitation vibration in 2D isotropic media based on the 2D elastic wave equation in the grid discretization method. The Rayleigh wave propagation can be observed through seismic wave field forward modeling near the surface. Earlier wave and Rayleigh wave are observed and distinguished through isolation from free surface of the radial and vertical particle motion curve.