Accurate numerical prediction of acoustic wave propagation

作者：Tsuru Hideo^*; Iwatsu Reima

来源：International Journal of Adaptive Control and Signal Processing, 2010, 24(2): 128-141.

DOI：10.1002/acs.1118

• wave propagation
• compact finite difference
• PML boundary condition
• multistep integration
• symplectic integration
• multistep time integration

In the marine engineering field, a sound wave is often utilized to visualize objects. In such a sensing method, an accurate numerical prediction of sound propagation is an important issue for theoretical considerations. Recently, a finite difference method in time domain (FDTD) is often applied to wave. propagation. However, an existing FDTD, sometimes fails to match the accuracy to be required. In the present paper, strategies to improve conventional methods are presented: the application of the compact finite difference on staggered grid with adjusted coefficients and the usage of optimized multistep time integration. It is shown that through these tactics, a highly accurate simulation is attainable.

• 出版日期2010-2