拖曳声源深度起伏对深海会聚区声传播损失测量的影响  

Influence of Depth Fluctuation of Towed Sound Source on the Measurement of Acoustic Transmission Loss in Convergence Zone

作　　者：李国富[1] 张爽[1] 齐占峰[1] 魏永星[1] 周莹[1] 于金花[1] 常哲[1] 秦玉峰[1] LI Guo-fu;ZHANG Shuang;QI Zhan-feng;WEI Yong-xing;ZHOU Ying;YU Jin-hua;CHANG Zhe;QIN Yu-feng(National Ocean Technology Center,Tianjin 300112,China)

机构地区：[1]国家海洋技术中心,天津300112

出　　处：《海洋技术学报》2020年第5期58-63,共6页Journal of Ocean Technology

基　　金：国家自然科学基金资助项目(11904064);海洋经济创新发展示范资助项目(BHSF2017-26);自然资源部海洋环境信息保障技术重点实验室开放基金资助项目(Z-19080-1A)。

摘　　要：深海会聚区声传播损失测量是海洋声学调查中的重要项目之一。拖曳声源深度起伏对深海会聚区声传播损失的准确测量具有直接影响。基于Argo资料和RAM声传播计算程序,对不同声源深度起伏幅度下的会聚区声传播损失进行了计算。结果表明:不同声源初始布放深度下,拖曳声源深度起伏对声传播损失测量具有相似的影响规律;与海底反射区和声影区相比,会聚区范围内的声传播损失对拖曳声源深度起伏不敏感;水平距离30 km以内的声传播损失受拖曳声源深度起伏的影响较大,即使在较低频率和较小深度起伏幅度时也会出现较大误差。The measurement of acoustic transmission loss in convergence zone is an important part of underwater acoustic survey. The depth fluctuation of the towed sound source has direct influence on the accurate measurement of the acoustic transmission loss in convergence zone. Based on Argo data and the RAM underwater acoustic propagation calculation program, the acoustic transmission loss in convergence zone at different depth fluctuation amplitude of sound source is calculated, leading to the results that for different initial placement source depth, the influence of depth fluctuation of the towed sound source on the measurement of the acoustic transmission loss is similar;that the acoustic transmission loss in convergence zone is not sensitive to the depth fluctuation of the towed sound source compared with that in the bottom reflected or sound shadow zone;and that the acoustic transmission loss at horizontal distance within 30 km is greatly affected by changes of the sound source depth even if the source frequency is low or the depth fluctuation amplitude is small.

关 键 词：会聚区 声传播损失 拖曳声源 深度起伏 ARGO资料 

分 类 号：O427.1[理学—声学]