摘要
本文从均匀浅海的频散方程出发导出了计算简正波衰减与群速的公式,并通过数值例子比较了它们的精度。文中特别讨论了临界简正波的衰减与群速,证明Pekeris浅海中临界简正波的衰减与群速一般小于海底吸收与声速,从而修正了 Kornhauser,Raney,Weston与Tindle关于临界简正波衰减与群速正好等于海底吸收与声速的结论。
Proceeding from the dispersion equation of the normal mode in homogeneous shallow water, we derive several formulae calculating the mode attenuation and group velocity, and compare their accuracy by means of numerical results. This paper especially discusses the attenuation and the group velocity of the critical mode in a Peketis channel and shows that, in general, the attenuation and the group velocity of the critical mode respectively are less than the absorption and the sound speed in the bottom. Therefore, the Kornhauser, Reney, Weston and Tindle's conclusions are modified that the attenuation and the group velocity of the critical mode are exactly equal to the absorption and the sound speed in the bottom, respectively.
出处
《声学学报》
EI
CSCD
北大核心
1989年第6期429-437,共9页
Acta Acustica
基金
国家自然科学基金
