基于波数积分方法，针对浅海3种典型声速剖面和细砂、粉砂及黏土-粉砂3种沉积层，利用快速场程序得到低频声在近程和远程的传播损失。数值结果表明：声速剖面在近距离上对传播损失没有显著影响，远距离上负梯度、负跃层分布时的传播损失明显高于等声速分布的传播损失；沉积层在近距离和远距离对传播损失都有较明显的影响，远距离时沉积层的衰减系数起重要作用。
Base on the wave-number integration method and the fast field program, the transmission loss, which is about fine sand、silt and clayey-silt bottom sediment and three kinds of sound speed profile in shallow water, is calculated in short and long distance. As illustrated by numerical simulations, the sound speed profile has no significant influence on transmission loss at close range. The transmission loss of the shallow water with negative gradient and negative thermocline over long distance is obviously higher than that of equal sound speed profile. The sediment in shallow water has an obvious influence on the transmission loss in short and long distance.The attenuation coefficient of the sediment play an important role in long distance.
2018,40(5): 100-104 收稿日期：2018-02-09
DOI：10.3404/j.issn.1672-7649.2018.05.018
分类号：TB559
作者简介：王尚可(1985-),女,工程师,主要从事舰船隐身与目标特性测试技术研究、固定资产投资项目管理等工作
参考文献：
[1] JENSEN F B, KUPERMAN W A, PORTER M B, et al. Computational ocean acoustics[M]. Springer Science & Business Media, 2011.
[2] 徐传秀, 朴胜春, 杨士莪, 等. 采用能量守恒和高阶Padé近似的三维水声抛物方程模型[J]. 声学学报. 2016, 41(4):477-484.
[3] JENSEN F B, ZAMPOLLI M. Finite-element modeling in ocean acoustics:Where are we heading? SHALLOW-WATER ACOUSTICS:Proceedings of the Second International Shallow-Water Acoustics Conference (SWAC'09)[M]. AIP Publishing, 2010, 1272(1):11-22.
[4] DINAPOLI F R, DEAVENPORT R L. Theoretical and numerical Green's function field solution in a plane multilayered medium[J]. J. Acoust. Soc. Am, 1980(67):92-105.
[5] 李整林, 王耀俊, 马力, 等. 海底沉积物参数对浅海中低频声传播的影响[J]. 声学学报, 2000, 25(3):242-246.
[6] 马黎黎, 王仁乾. 分层砂底对浅海信道声传播影响的研究[J]. 声学学报, 2003, 28(2):145-150.
[7] 朱业, 张仁和, 鄢锦, 等. 理想负跃层浅海中脉冲波形的理论分析[J]. 声学学报, 1995, 20(4):289-297.
[8] 潘长明, 高飞, 孙磊, 等. 浅海温跃层对水声传播损失场的影响[J]. 哈尔滨工程大学学报, 2014, 35(4):401-407.
