| 分层海洋介质中本征声线的快速计算 |
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| 引用本文： | 孙枕戈,马远良,屠庆平.分层海洋介质中本征声线的快速计算[J].应用声学,1997,16(4):7-14. |
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| 作者姓名： | 孙枕戈 马远良 屠庆平 |
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| 作者单位： | [1]中国科学院声学研究所 [2]西北工业大学航海工程学院 |
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| 摘 要： | 本文提供一种在恒定水深的水平分层海洋中快速计算本征声线的方法，该方法引入声线跨度的概念，将本征声线分解为若干声线跨度的组合，并以声线常数为自变量建立声线组合方程。利用牛顿下山法迭代求解该方程得到本征声线，极大地提高了计算效率，给定海深，声剖面，声源距离、深度及接收器深度等参数时，应用本方法可计算出若干条本征声线的出射角、到达接收位置时的入射角和传播时间。若附加声源的辐射频率和海底底质等信息，还可
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| 关 键 词： | 分层介质 本征声线 迭代算法 海洋 声线跨度 |
Fast search for eigenrays in stratified ocean |
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| Sun Zhenge,Ma Yuanliang and Tu qingping.Fast search for eigenrays in stratified ocean[J].Applied Acoustics,1997,16(4):7-14. |
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| Authors: | Sun Zhenge Ma Yuanliang and Tu qingping |
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| Institution: | Insititute of Academia sinica , Beijing , 100080;College of Marrine Engineering, Northwestern Polytechnics University, Xian, 710072;College of Marrine Engineering, Northwestern Polytechnics University, Xian, 710072 |
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| Abstract: | This paper presents an efficient algorithm for finding eigenrays in stratified o-cean. The path of an eigenray is represented by the combination of several specified rayspans. Eigenrays are found using an efficient algorithm based on an analysis of the range-invariant ray spans and their dependence of ray path geometry on the Snell invariant.This approach has been implemented on IBM PC computer. It has potential uses on pas-sive localization and the prediction of coded signal propagation in fading channel. Severalexamples included in this paper show the accuracy and efficiency of this algorithm. |
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| Keywords: | Stratified medium Eigenray Span Iterative algorithm |
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