双轴海洋声道中的声传播
文献类型：学位论文
| 作者 | 鄢锦 |
| 学位类别 | 博士 |
| 答辩日期 | 1995 |
| 授予单位 | 中国科学院声学研究所 |
| 授予地点 | 中国科学院声学研究所 |
| 关键词 | 声波传播 双轴水下声道 简正波方法 |
| 中文摘要 | 本文首先分析了平面声波入射到非均匀介质中的声场，经过近似得出了平面波反射系数。随后将广义相积分（WKBZ）简正波理论推广应用到双轴海洋声道中，针对存在的问题提出了将WKBZ与打靶法结合起来的数值方法(WKBZ--SM)，数值模拟证实了该方法的有效性。然后，计算了各种条件下简谐点源的声场分布，通过比较计算结果，研究了声场分布对频率的依赖关系、表面声道和深海声道对声场分布的影响。最后，研究声脉冲在深海双轴声道中的传播，分析并解释了接收信号特征与频率、距离及深度的关系。 |
| 英文摘要 | The paper consists of three parts. Part one deals with the normal mode method proposed. First, normal mode theory and numerical methods are resumed. Then, the generalized phase-integral (WKBZ) theory is extended to two-axis underwater channel. In order to overcome the defect existing, the WKBZ-SM method is proposed which combines the WKBZ and the shooting method. Last, comparisons are made between the method proposed and other one available, and the effectiveness of the method is showed. Part two, includig chapter five, deals with the sound field for a harmonic piont source. The sound fields in various velocity profiles are calculated, and investigations are made on how sound field deponds on acoustic frequency and velocity profile. Part three deals with the pulse propagation problems in two-axis underwater channel. The relation is analyzed and explained between arrival signal characteristics and the signal frequency spectrum, the propagation distance, and the depths of source and receiver. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 55 |
| 源URL | [http://159.226.59.140/handle/311008/1260]  |
| 专题 | 声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 鄢锦. 双轴海洋声道中的声传播[D]. 中国科学院声学研究所. 中国科学院声学研究所. 1995. |
入库方式： OAI收割
来源：声学研究所
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