首页 | 本学科首页   官方微博 | 高级检索  
     检索      

深海汇聚区的焦散结构与声能分布特征
引用本文:阎肖鹏.深海汇聚区的焦散结构与声能分布特征[J].海洋通报,2012,31(3):283-289.
作者姓名:阎肖鹏
作者单位:中国人民解放军91550部队,辽宁大连,116023
摘    要:在深海汇聚区声场中,不同初始角的声线在传播过程中因折射程度差异形成特定的焦散结构。根据射线理论推导了线性剖面条件下用F算子表示的声线轨迹模型,并讨论了焦散结构与掠射角及声源-接收深度配置的变化关系。折射型焦散线由0°~5°的小角度声线构成,为波导结构;反射型焦散线由掠射角为±(5°~10°)的声线构成,为折线结构,且上行与下行声线的焦散线结构明显不同。应用BELLHOP模型分析得出了汇聚区增益与声源-接收深度条件的变化关系,并根据射线到达结构和焦散特征提出了一种确定汇聚区位置和范围的方法。

关 键 词:汇聚区  焦散  传播损失  声线
收稿时间:2010/11/2 0:00:00
修稿时间:2011/9/29 0:00:00

Caustic structures and acoustic energy distribution features in the convergence zone environment
YAN Xiao-peng.Caustic structures and acoustic energy distribution features in the convergence zone environment[J].Marine Science Bulletin,2012,31(3):283-289.
Authors:YAN Xiao-peng
Institution:Unit 91550 of PLA, Dalian 116023, China
Abstract:A series of caustic structures can be formed by rays radiated and refracted with different initial angles in the process of propagation in the convergence zone(CZ). A formula using F operator is developed based on ray model in a condition of linear sound speed profile (SSP). The correlation between caustic structure and angle and source-receiver depth is discussed. Refracted caustics are composed of rays with the initial angle in the range of 0o ~5o, which shows the duct structure. Reflected caustics are composed of rays with the initial angle in the range of ±(5o~10o), which shows the linear structure. And the upward rays and downward rays show the different configurations. The relationship between CZ gain and source-receiver depth is analyzed by BELLHOP model, and a new method is developed to determine the position and the range of CZ based on the ray arrival structure and caustic features.
Keywords:convergence zone (CZ)  caustic  transmission loss (TL)  ray
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《海洋通报》浏览原始摘要信息
点击此处可从《海洋通报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号