Absorbing boundary conditions for acoustic and elastic wave equations
Absorbing boundary conditions for acoustic and elastic wave equations
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DOI：
10.1785/bssa0670061529
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发表时间：
1977
影响因子：
3
通讯作者：
R. Clayton;B. Engquist
中科院分区：
文献类型：
--
作者：
R. Clayton;B. Engquist
推导了用于数值波浪模拟的边界条件，以最小化来自计算区域边缘的人工反射。通过这种方式，有限区域中的声波和弹性波传播可以有效地用来描述无界区域中的物理行为。边界条件基于标量方程和弹性波方程的近轴近似。它们的计算成本低，应用简单，并且可以在很大范围内减少入射角度的反射。
Boundary conditions are derived for numerical wave simulation that minimize artificial reflections from the edges of the domain of computation. In this way acoustic and elastic wave propagation in a limited area can be efficiently used to describe physical behavior in an unbounded domain. The boundary conditions are based on paraxial approximations of the scalar and elastic wave equations. They are computationally inexpensive and simple to apply, and they reduce reflections over a wide range of incident angles.