计算大气声学

Computational atmospheric acoustics

近年来陆续涌现的一批有关大气声传播的数值计算工作，已使“计算大气声学”这一新兴“亚分支”的形成指日可待。本文简明扼要、系统全面地介绍了这一崭新领域的概貌，较为详尽地阐述了其主要对象和方法——特别是其中的抛物方程（PE）法、快速场程序（FFP）和可看成是一种修正的射线寻迹法——Gauss射线束（GB）法。因限于篇辐，未能将各种方法的结果比较列入，这一部分有趣的材料以后有机会另行发表。

Abstract: Quite a number of numerical computation works contributed to the atmospheric acoustic propagation emerging constantly in recent years make the formation of a new developing sub-branch 'Computational Atmospheric Acoustics' become just round the corner. The present paper provides a brief, clear, systematic and comprehensive introduction to this brand-new field and gives a relatively exhaustive demonstration of its main objects and methods, especially the parabolic equation (PE) method, the fast field program (FFP) and the Gaussian beam (GB) approach-may be regarded as a modified ray tracing procedure. A discussion concerning the comparison among the results obtained by these various methods cannot be included for the limitation of space, some opportunity for publishing these interesting materials separately would be expected.