| BDRM理论在双轴海洋声道中的应用 |
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| 引用本文： | 张林,笪良龙,卢晓亭.BDRM理论在双轴海洋声道中的应用[J].海洋通报(英文版),2007,9(2):12-17. |
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| 作者姓名： | 张林 笪良龙 卢晓亭 |
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| 作者单位： | 海军潜艇学院战术水声数据中心,青岛,266071 |
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| 摘 要： | 由于表面声道与深海声道间的耦合效应,声波在双轴海洋声道中的传播比较复杂,因此求解双轴海洋声道中的声场就比较困难。在 WKBZ 本征函数的基础上,推导出了参考界面相位修正的一致表达式,并将浅海声传播的波束位移射线简正波(BDRM)理论应用于计算双轴海洋声道中的声场,进行了数值模拟并与传统简正波方法进行比较,结果表明应用 BDRM 理论计算的传播损失具有很高的精度和速度,可以对双轴海洋声道内声传播问题进行分析和预报。
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| 关 键 词： | BDRM 理论 双轴海洋声道 传播损失 |
| 修稿时间： | 2005-08-27 |
Application of BDRM Theory in the Two-AXIS Underwater Channel |
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| ZHANG Lin,DA Lianglong,LU Xiaoting.Application of BDRM Theory in the Two-AXIS Underwater Channel[J].Marina Science Bulletin,2007,9(2):12-17. |
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| Authors: | ZHANG Lin DA Lianglong LU Xiaoting |
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| Institution: | Underwater Acoustics Data Center, Navy Submarine Academy, Qingdao 266071, Shandong, China |
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| Abstract: | Two-axis underwater channel often exists in deep ocean. Because of the coupling between surface channel and SOFAR channel, sound propagation in the two-axis underwater channel is complex and so its calculations of acoustic fields are difficult. The beam-displacement ray-mode (BDRM) theory is a normal mode method for propagation modeling in the common horizontally stratified shallow water. We improve the theory, proposing a new method for computing the upper boundary reflection coefficient, and apply it to calculate the acoustic fields of two-axis underwater channel. Transmission losses in the two-axis underwater channel are calculated by the BDRM theory. The results are in good agreement with the KRAKEN code and the computational speed excels those of the other methods. |
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| Keywords: | two-axis underwater channel BDRM theory reflection coefficient phase-shift correction |
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