浅海地震波传播的简正波模型  

A Normal Mode Model for Ocean Seismo-acoustics in Shallow Water

作　　者：颜冰[1] 周伟[1] 龚沈光[1] 

机构地区：[1]海军工程大学,武汉430033

出　　处：《武汉理工大学学报（交通科学与工程版）》2006年第5期804-806,830,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：海军"十.五"预研项目资助(批准号:4010709010101)

摘　　要：应用简正波理论,阐述了一般分层浅海的声场传播问题,并计算了在弹性切变海底条件下的声传播问题,分析了在浅海海底表面传播的地震波传播效应.对声场的理论计算表明,该方法较为准确地预报了浅海声传播的传播损失.A normal mode method for the sound propagation in shallow water resting on a stratified bottom is presented. The mathematical basis for the normal mode model is the depth separation of the wave equation for range independent ocean waveguides. And the approach uses complex contour integration to reduce the integration to that of a sum of residuals corresponding to the poles introduced by the eigenvalue equation. The effect of the sea sediment parameters and central frequency of the source on the low frequency acoustic wave propagation in shallow water are investigated. Two applications are given to demonstrate the accuracy and efficiency of the method.

关 键 词：简正波 传播损失 切变波 浅海地震波 

分 类 号：P733.21[天文地球—物理海洋学]