各向异性介质中弹性波传问题的数值解法

通过运用速度－应力有限差分法研究方位各向异性介质中的弹性波传播问题，在计算实施过程中，使用了交错网格技术，为了减少计算量，首次引入了适用于各向异性体的吸收边界条件，并对角点处的吸收做特殊的处理，算例表明，该算法不仅具有较高的精度；与传统方法相比，计算时间也大为缩短，从而可望在实际中获得良好的应用前景。

A NUMERICAL METHOD OF MODELING ELASTIC WAVE PROPAGATION IN ANISOTROPIC MEDIA

The velocity-stress finite-difference method is adopted to simulate the elastic wave propagation in azimothal anisotropic medin, and the difference grids are completely staggered in the numerical implementation. To reduce the computational work, the absorbing boundary conditions fitted for anisotropic media are introduced first, and the corner points are also specially treated. The calculated examples show that higher accurate results can be obtained by the modeling algorithm and the computational time is much less than that of using the conventional methods. Therefore, the algorithm has broad application prospects in engineering.