摘要
在地震波数值模拟过程中，需要采用吸收边界条件以吸收人为边界反射。本文通过对TI介质中二维及三维一阶弹性波方程的特征分析，分别得到了与原波动方程形式相同的吸收边界条件，并在二维弹性波数值模拟中进行了应用。波场快照试算结果表明，这种吸收边界条件吸收效果很好，而且形式简单，易于实现。
Absorptive boundary condition for absorbing man-made boundary reflection must be required in the numerical modeling of seismic wave. The absorptive boundary conditions which are similar to those in original wave equations can be obtained respectively by analysing 2-D and 3-D one-order elastic wave equations in TI medium, and they are applied to numerical modeling of 2-D elastic wave. Snapshot of wave field trial result says that this kind of absorptive boundary condition brings good absorption effect except its simplicity and easy achievement.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1999年第1期45-56,共12页
Oil Geophysical Prospecting
关键词
吸收边界条件
数值模拟
弹性波
地震波
地震勘探
absorptive boundary condition, numerical modeling, elastic wave equation, grid, wave field
