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大洋中的物理海洋现象影响着水体的变化, 从而对其中的声波传播产生重要的影响. 首次在东印度洋海域进行的声学调查实验, 发现了印度洋热带偶极子物理海洋现象对声传播的影响, 利用穿越热带偶极子的声传播实验数据, 分析了声源深度和水体起伏对深海会聚区的影响, 并对实验中的声传播现象形成机理进行了理论解释. 结果表明: 东印度洋深海非完全声道环境下, 受热带偶极子形成暖水团和声源深度起伏的影响, 第2会聚区没有形成, 声源深度变深时, 更容易形成深海会聚区; 印度洋热带偶极子影响下第2会聚区位置处的水体跃层起伏会对下一个会聚区的形成及位置产生重要影响, 使得第3会聚区提前形成, 会聚区位置向声源方向偏移2—3 km. 研究结果对探测及通信声纳在深海复杂环境下应用具有重要指导意义.The physical ocean phenomena in the ocean affect the changes of water body, which has an important influence on the sound propagation. A hyperbolic frequency modulation (HFM) signal sound propagation experiment of towed sound source in the East Indian Ocean (EIO) was conducted in summer 2019. The center frequency of the towed sound source is 300 Hz, and the hydrophone receives the data from 4130 m far. This is the first time that we have conducted the underwater acoustic survey in the Indian Ocean. The influence of the physical ocean phenomenon—Indian Ocean Dipole (IOD) on sound propagation is observed. The experimental data of sound propagation from the IOD are processed and analyzed, the effects of sound source depth and water fluctuation on the deep-sea convergence zone (CZ) are analyzed, and the formation mechanism of sound propagation phenomenon in the experiment is explained theoretically. The results show that the second CZ is not formed under the influence of the warm water mass formed by the IOD and the depth of the sound source in the incomplete deep channel environment of the EIO. Owing to the fluctuation of the sound source depth, the deep-sea CZ disappears at the distance where it should have appeared. When the depth of the sound source becomes deeper, it is easier to form the deep-sea CZ. Under the influence of the IOD, the thermocline fluctuation at the location of the second CZ has an important influence on the formation and location of the third CZ. It is found that the location of the third CZ shifts 2–3 km toward the sound source in the experiment. The research results have important significance in guiding the applications in detection and communication sonar in deep-sea complex environment.
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Keywords:
- sound propagation in deep water /
- Indian Ocean dipole /
- water fluctuation /
- the shift of convergence zone.
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图 9 实验期间调查海区测线温度及海面波高数据 (a) 实验海区夏季月平均海表温度数据; (b) 实验海区声传播测线实验当天的平均海表温度数据; (c) XBT实测数据与平均值声速差; (d)实验海区声传播实验当天的海表高度遥感数据
Fig. 9. The sea surface temperature (SST) and sea surface wave height during the experiment: (a) Monthly SST data in summer; (b) SST data during the experiment; (c) the difference of sound velocity between XBT measured and average value; (d) sea surface wave height during the experiment from remote sensing in CMEMS database.
表 1 两种环境下不同距离上的到达声线的最大幅度统计表
Table 1. Maximum amplitude of sound ray arrivals at different distances in two environments.
环境 距离/km 171.86 172.86 173.87 174.87 175.88 176.88 177.89 178.89 179.90 180.9 181.9 水平变化环境 6.2 4.7 11.6 42.2 29.3 36.0 51.2 31.3 27.4 25.4 13.6 水平不变环境 9.1 5.5 5.6 8.3 5.4 4.6 19.6 45.6 19.2 28.1 12.4 -
[1] Brekhovskikh L M, Lysanov Yu P 2003 Fundamentals of Ocean Acoustics (3rd Ed.) (New York: Springer-Verlag Press) pp135–145
[2] S. M. 弗拉泰 等 著 (高天赋 等 译) 1985 起伏海洋中的声传播 (北京: 海洋出版社) 第115—156页
Flatté S M et al. (translated by Gao T F et al. ) 1985 Sound propagation in undulating Ocean (Beijing: Ocean Press) pp115–156 (in Chinese)
[3] 胡涛, 宋文华 2014 物理 43 667
Google Scholar
Hu T, Song W H 2014 Physics 43 667
Google Scholar
[4] Zhou J X, Zhang X Z, Rogers P H. 1991 J. Acoust. Soc. Am. 90 2042
Google Scholar
[5] 秦继兴, Katsnelson B, 李整林, 张仁和, 骆文于 2016 声学学报 41 145
Qin J X, Katsnelson B, Li Z L, Zhang R H, Luo W Y 2016 Acta Acust. 41 145
[6] Yang T C 2006 J. Acoust. Soc. Am. 120 2595
Google Scholar
[7] 季桂花, 李整林, 戴琼兴 2008 声学学报 33 419
Google Scholar
Ji G H, Li Z L, Dai Q X 2008 Acta Acust. 33 419
Google Scholar
[8] Xiao Y, Li Z L, Li J, Liu J Q et al. 2019 Chin. Phys. B 28 054301
Google Scholar
[9] John A C, Daniel L R 2020 J. Acoust. Soc. Am. 148 2040
Google Scholar
[10] Cheng C 2016 Chin. Ocean Acoust. Sym. (Harbin: China)
[11] 刘华锋 章向明 唐佑民 陈大可 2014 海洋科学进展 32 405
Google Scholar
Liu H F, Zhang X M, Tang Y M, Chen D K. 2014 Advan. Marine Sci. 32 405
Google Scholar
[12] Weinberg N et al. 1977 J. Acoust. Soc. Am. 62 888
Google Scholar
[13] Mellberg L E, Robinson A R, Botseas G J et al. 1990 J. Acoust. Soc. Am. 87 1044
Google Scholar
[14] Heaney K D, Campbell R L 2016 J. Acoust. Soc. Am. 139 918
Google Scholar
[15] Georges A D, Kevin B S, Mohsen B et al. 2019 J. Acoust. Soc. Am. 146 1875
Google Scholar
[16] Eckart C, Carhart R R 1950 Fluctuation of Sound in the Sea (Committee on Undersea Warfare: National Research Council) pp63–122
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Google Scholar
[19] 张青青, 李整林, 秦继兴 2020 应用声学 39 821
Google Scholar
Zhang Q Q, Li Z L, Qin J X 2020 Applied Acoust. 39 821
Google Scholar
[20] 季桂花, 何利, 张振洲, 甘维明 2021 声学学报 46 1132
Ji G H, He L, Zhang Z Z, Gan W M 2021 Acta Acust. 46 1132
[21] 刘清宇 2006博士学位论文(哈尔滨: 哈尔滨工程大学)
Liu Q Y 2006 Ph. D. Dissertation (Harbin: Harbin Engineering University) (in Chinese)
[22] Cheng C, Yan F G, Jin T, Zhou Z Q 2020 Applied Acoust. 169 107478
Google Scholar
[23] 肖瑶 2019 博士学位论文 (北京: 中国科学院声学研究所)
Xiao Y 2019 Ph. D. Dissertation (Beijing: The Institute of Acoustics of the Chinese Academy of Science) (in Chinese)
[24] 胡治国, 李整林, 张仁和, 任云 2016 物理学报 65 014303
Google Scholar
Hu Z G, Li Z L, Zhang R H, Ren Y 2016 Acta Phys. Sin. 65 014303
Google Scholar
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[26] 胡治国, 李整林, 张仁和, 任云, 李鋆 2016 声学学报 41 758
Hu Z G, Li Z L, Zhang R H, Ren Y, Li Y 2016 Acta Acust. 41 758
[27] 王梦圆, 李整林, 吴双林, 秦继兴, 余炎欣 2016 声学学报 44 905
Wang M Y, Li Z L, Wu S L, Qin J X, Yu Y X 2016 Acta Acust. 44 905
[28] 李国富, 张爽, 齐占峰, 魏永星, 周莹, 于金花, 常哲, 秦玉峰 2020 海洋技术学报 39 58
Li G F, Zhang S, Qi Z F et al, Wei Y X, Zhou Y, Yu J H, Chang Z, Qin Y F. 2020 J. Ocean. Tec. 39 58
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Google Scholar
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Wu L L, Peng Z H 2016 SCI. China Phys. Mech. 46 8
[31] Collins M D. 1993 J. Acoust. Soc. Am. 93 1736
Google Scholar
[32] 肖鹏 2017 博士学位论文 (西安: 西北工业大学)
Xiao P 2017 Ph. D. Dissertation (Xi'an: Northwestern Polytechnical University) (in Chinese)
[33] 朴胜春, 栗子洋, 王笑寒, 张明辉 2021 物理学报 70 024301
Google Scholar
Piao S C, Li Z Y, Wang X H, Zhang M H 2021 Acta Phys. Sin. 70 024301
Google Scholar
[34] 刘伯胜, 雷家煜 2010 水声学原理(第二版)(哈尔滨: 哈尔滨工程大学出版社)
Liu B S, Lei J Y 2010 Principles of Underwater Sound (2nd Ed.) (Harbin: Harbin Engineering University Press) (in Chinese)
[35] 姜继兰, 刘屹岷, 李建平, 张人禾 2021 地球科学进展 36 579
Google Scholar
Jiang J L, Liu Y M, Li J P, Zhang R H 2021 Advan. Earth Sci. 36 579
Google Scholar
[36] Porter M B, Bucher H P 1987 J. Acoust. Soc. Am. 82 1349
Google Scholar
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