| 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].,1997,16(4):7-14 |
| 分层海洋介质中本征声线的快速计算 |
| Fast search for eigenrays in stratified ocean |
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| 中文摘要: |
| 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统跨度的组合，并以声线常数为自变量建立声线组合方程．利用牛顿下山法送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、声速剖面、声源距离、深度及接收器深度等参数时，应用本方法可以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，还可以计算出到达声线所携带声波的声强与相位．这样应用经典射线声学的方法就可简明描述声场分布．本方法已在IBMPC微机上实现．它对许多海洋射线声学问题的研究有所助益，在深海远程目标定位、衰落信道中编码信号的传播预报等方面预期有广泛用途． |
| 英文摘要: |
| 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. |
| DOI：10.11684/j.issn.1000-310X.1997.04.002 |
| 中文关键词: 分层介质 本征声线 跨度 迭代算法 |
| 英文关键词: Stratified medium Eigenray Span Iterative algorithm |
| 基金项目: |
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