| 声速分布对浅海低频声场空间相关的影响研究 |
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| 引用本文： | 朱军,祝捍皓,屈科,郑广学,胡佳臣.声速分布对浅海低频声场空间相关的影响研究[J].声学技术,2019,38(4):376-381. |
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| 作者姓名： | 朱军 祝捍皓 屈科 郑广学 胡佳臣 |
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| 作者单位： | 浙江海洋大学船舶与机电工程学院;浙江海洋大学海洋科学与技术学院;广东海洋大学电子与信息工程学院 |
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| 基金项目： | 国家自然科学基金资助项目（11704337）；浙江省海洋观察-成像试验区重点实验室资助项目（00IT20170F01）；浙江省教育厅科研项目（Y201738505） |
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| 摘 要： | 针对浅海低频环境下水中声速分布对声场空间相关性的影响问题,利用基于抛物方程方法的RAM程序,仿真分析了声场空间相关特性在浅海不同声速梯度、不同阵元间隔下的变化规律。研究结果表明:在浅海低频环境下,正声速梯度值越大,垂直相关系数衰减越慢,水平纵向相关系数则相反;随着正声速梯度值的增大,垂直相关长度和水平纵向相关长度均呈现剧烈波动。负声速梯度值越大,垂直相关系数衰减越快,水平纵向相关系数则相反;随着负声速梯度值的增大,两类空间相关长度均缓慢波动。
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| 关 键 词： | 浅海声场 抛物方程法 声速分布 空间相关 |
| 收稿时间： | 2018/3/7 0:00:00 |
| 修稿时间： | 2018/4/16 0:00:00 |
Influences of velocity profiles on the spatial correlation of low-frequency sound field in shallow water |
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| ZHU Jun,ZHU Han-hao,QU Ke,ZHENG Guang-xue and HU Jia-chen.Influences of velocity profiles on the spatial correlation of low-frequency sound field in shallow water[J].Technical Acoustics,2019,38(4):376-381. |
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| Authors: | ZHU Jun ZHU Han-hao QU Ke ZHENG Guang-xue and HU Jia-chen |
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| Affiliation: | Institute of Naval Architecture and Mechanical-Electrical Engineering, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China,Institute of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China,College of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China,Institute of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China and Institute of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China |
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| Abstract: | Aiming at the influence of velocity profiles on the spatial correlation of low-frequency sound field in shallow water, the variation of spatial correlation under different velocity gradients and different array element intervals is simulated and analyzed by using the RAM program, which is based on the parabolic equation. Simulation results show that with the increase of positive velocity gradient, the vertical correlation coefficient decays more slowly and the horizontal-longitudinal correlation coefficient decays faster, both the vertical and the horizontal-longitudinal correlation lengths fluctuate violently; with the increase of the negative velocity gradient, the vertical correlation coefficient decays faster and the horizontal-longitudinal correlation coefficient decays more slowly, the correlation length of both types fluctuates slowly. |
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| Keywords: | shallow water sound field parabolic equation velocity profiles spatial correlation |
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