【摘要】 本文采用旋转交错网格差分格式对VTI(垂直对称轴的横向各向同性)介质准P波一阶应力-速度方程进行数值模拟。并在PML边界条件和稳定性条件下得出Marmousi等复杂模型的高精度波场快照和地震记录,分析了各向异性对地震波的影响。数值结果表明:旋转交错网格有限差分能获得高精度的地震模拟数据,PML边界有较好的吸收效果。更多还原

【Abstract】 Using the rotated staggered-grid of finite difference form, the numerical modeling of the first-order stress-velocity equation of quasi-P wave in VTI(vertical axis of symmetry of the transversely isotropic) medium is achieved. Under the PML boundary conditions and the stability condition, high precision wave field snapshots and synthetic record of complex models such as Marmousi are obtained. Besides, we analyze the effect of the anisotropy on seismic wave. The results show that the rotated staggered-grid of finite difference can get high precision seismic simulation data, and the PML boundary has better absorption effect.更多还原