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| 孤子内波对声场水平纵向相干特性的影响 | |
| 引用本文： | 宋俊,李风华,胡永明.孤子内波对声场水平纵向相干特性的影响[J].声学技术,2007,26(2):199-205. |
| 作者姓名： | 宋俊 李风华 胡永明 |
| 作者单位： | 1. 国防科技大学光电科学与工程学院,湖南长沙,410073;中国科学院声学研究所声场声信息国家重点实验室,北京,100080 2. 中国科学院声学研究所声场声信息国家重点实验室,北京,100080 3. 国防科技大学光电科学与工程学院,湖南长沙,410073 |
| 摘 要： | 运用抛物方程计算模型,研究了浅海孤子内波对声场水平纵向相干特性的影响。仿真结果表明,孤子内波会引起水平纵向相关系数随时间出现起伏。起伏的幅度与收发深度有关,起伏周期与孤子内波的传播速度有关。理论分析给出了在孤子内波的传播方向与水平阵平行时,水平纵向相关系数随时间变化的简明表达式。 |
| 关 键 词： | RAM-PE模型 抛物方程 孤子内波 水平纵向相干 |
| 文章编号： | 1000-3630（2007）-02-0199-07 |
| 收稿时间： | 2006-01-25 |
| 修稿时间： | 2006-01-252006-12-11 |
Effects of solitary internal wave on horizontal longitudinal coherence of shallow-water acoustic fields |
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| SONG Jun,LI Feng-hua and HU Yong-ming.Effects of solitary internal wave on horizontal longitudinal coherence of shallow-water acoustic fields[J].Technical Acoustics,2007,26(2):199-205. | |
| Authors: | SONG Jun LI Feng-hua and HU Yong-ming |
| Affiliation: | 1 College of Photo-electric Science and Engineering, National University of Defense Technology, Changsha 410073; 2. National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China |
| Abstract: | A numerical study of the effect of a solitary internal wave on the horizontal longitudinal coherence in a shallow water waveguide with a thermocline is carried out based on parabolic equation(PE) model.The result shows that the horizontal longitudinal correlation coefficient osci-llates with time.The amplitude of oscillation is related to the depth of receiver and source,and the period of oscillation is related to the propagation velocity of solitary internal wave.A simple ex-pression of the relation between horizontal longitudinal coherence and time is theoretically derived for the case that the propagation direction of solitary internal wave is parallel to the array. |
| Keywords: | RAM-PE model parabolic equation solitary internal wave horizontal longitudinal coherence |
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