摘要
从具有水平对称轴的横向各向同性(HTI)介质中的弹性波动方程出发,在交错网格空间中采用高阶差分算子对弹性波动方程进行差分离散,得到了HTI介质中地震波正演的高阶有限差分格式,研究并实现了PML吸收边界条件。在此基础上实现了HTI介质中弹性波方程的多波正演。数值算例表明,该方法能够精确模拟弹性波在复杂各向异性介质中的传播过程,得到高精度的正演记录。
Start from the elastic wave equations for transverse isotropic medium with a horizontal axis of symmetry, a high-order finite difference scheme is established using a high precision operator in staggered-grid. The paper also proposed a perfectly matched absorbing layer （PML） boundary condition and studied its computing methods. Based on above two techniques, the forward modeling of seismic wave fields in complex anisotropic media is implemented. The numerical tests imply that the method can simulate the seismic propagation accurately and can obtain high precision multi-component seismograms.
出处
《中国煤炭地质》
2008年第1期50-54,共5页
Coal Geology of China
基金
国家高技术研究发展计划(863)项目(2006AA06Z203)资助
关键词
裂隙
各向异性
波动方程
吸收边界条件
有限差分
fracture
anisotropy
wave equation
absorbing boundary condition
finite difference
