浅海波导界面对点源振速方向的影响  

Effects of shallow water waveguide interface on the particle velocity direction from point sources

作　　者：李家亮[1,2,3] 林建恒[1] 郭圣明[2] 衣雪娟[1] 

机构地区：[1]中国科学院声学研究所北海研究站,青岛266023 [2]中国科学院水声环境特性重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《应用声学》2015年第3期249-254,共6页Journal of Applied Acoustics

基　　金：国家自然科学基金资助项目(11204345)

摘　　要：研究浅海波导对点源振速方向的影响具有十分重要的意义。采用"虚源法"分析计算了浅海波导环境中接收点处点源总振速方向与水平面夹角,侧重讨论确定性界面反射对总振速方向的影响。研究结果表明:总振速方向和接收点与声源的水平距离、两者深度,海底、海面特性以及声速剖面等有关。在等声速均匀浅海波导中,由于确定性界面反射的影响,当直达声掠射角为1°～50°时,合成总振速方向偏离直达声方向达1.5°～10.5°,声速剖面呈负梯度时,偏离程度更甚。It is very significant to study the effects of shallow water waveguide interface on the particle velocity direction from point source. In this paper, ＂Image source＂ method was adopted to analyze the direction of particle velocity and the horizontal angle of receiver point in shallow water waveguide, and the effects of certain interface reflection on the direction of particle velocity was studied. It is shown that： the direction of particle velocity has relationships with horizontal range and depth between source and receiver point, and the properties of surface and bottom and the sound speed profile. Because of the reflection of certain interface, the direction of particle velocity 7 deviates from the incidence angle of direct sound as 1.5° - 10.5° in the uniform sound speed in shallow water waveguide when the incidence angle varies from 1° to 50°, and the deviation can be more marked under negative gradient sound speed with isovelocity profile conditions.

关 键 词：浅海波导 界面 虚源 质点振速 

分 类 号：O422.2[理学—声学]