Chobeau Pierre, Savioja Lauri
Department of Computer Science, Aalto University, Otaniementie 17, FI-02150 Espoo, Finland
J Acoust Soc Am. 2016 Jul;140(1):EL119. doi: 10.1121/1.4958977.
Three absorbing layers are investigated using standard rectilinear finite-difference schemes. The perfectly matched layer (PML) is compared with basic lossy layers terminated by two types of absorbing boundary conditions, all simulated using equivalent memory consumption. Lossy layers present the advantage of being scalar schemes, whereas the PML relies on a staggered scheme where both velocity and pressure are split. Although the PML gives the lowest reflection magnitudes over all frequencies and incidence angles, the most efficient lossy layer gives reflection magnitudes of the same order as the PML from mid- to high-frequency and for restricted incidence angles.
使用标准直线有限差分格式研究了三种吸收层。将完全匹配层（PML）与由两种吸收边界条件终止的基本有损层进行比较，所有这些都是在等效内存消耗的情况下进行模拟的。有损层具有标量格式的优点，而PML依赖于一种交错格式，其中速度和压力都被分开。尽管PML在所有频率和入射角上都给出了最低的反射幅度，但最有效的有损层在中高频和受限入射角下给出的反射幅度与PML相同。
