1.哈尔滨工程大学 水声技术全国重点实验室, 黑龙江 哈尔滨 150001
2.海洋信息获取与安全工信部重点实验室(哈尔滨工程大学) 工业和信息化部, 黑龙江 哈尔滨 150001
3.哈尔滨工程大学 水声工程学院, 黑龙江 哈尔滨 150001
[ "曹德瑨, 男, 博士研究生" ]
[ "张海刚, 男, 教授,博士生导师" ]
收稿:2025-05-23,
网络首发:2025-06-16,
纸质出版:2025-08-05
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曹德瑨, 张海刚, 谢金怀, 等. 弹性沉积层声虹吸效应对浅海甚低频声场的影响[J]. 哈尔滨工程大学学报, 2025,46(8):1485-1494.
Dejin CAO, Haigang ZHANG, Jinhuai XIE, et al. Effect of elastic layer acoustic siphon on shallow-water very low frequency sound field[J]. Journal of Harbin Engineering University, 2025, 46(8): 1485-1494.
曹德瑨, 张海刚, 谢金怀, 等. 弹性沉积层声虹吸效应对浅海甚低频声场的影响[J]. 哈尔滨工程大学学报, 2025,46(8):1485-1494. DOI: 10.11990/jheu.202505023.
Dejin CAO, Haigang ZHANG, Jinhuai XIE, et al. Effect of elastic layer acoustic siphon on shallow-water very low frequency sound field[J]. Journal of Harbin Engineering University, 2025, 46(8): 1485-1494. DOI: 10.11990/jheu.202505023.
研究海底弹性沉积层特征对浅海甚低频声场的影响,对实现甚低频段水声技术的应用具有重要意义。本文对能够导致浅海甚低频声传播损失周期变化的软弹性沉积层声虹吸效应进行研究。依据波束位移射线简正波理论与声波反射理论,研究了弹性沉积层海底反射特征,给出了该条件下声虹吸频率周期的表达式;分析了声虹吸效应随海底参数的变化规律及其对甚低频声场特性的影响。研究表明:声虹吸频率对沉积层横波与厚度敏感,声虹吸效应会影响波导中简正波传播,浅海甚低频声场干涉结构周期变化、相速度频散曲线在声虹吸频率处突变。
The very low frequency (VLF) acoustic field is strongly affected by the elastic characteristics of the seabed. This study analyzes the acoustic siphon effect caused by the soft
elastic
sedimentary seabed
which induces periodic variations in shallow waters
namely the VLF acoustic propagation loss. The beam displacement ray mode and acoustic wave reflection theories were used in calculating the acoustic siphon frequency period for the elastic sedimentary seabed based on analysis of the reflection characteristics of the seabed. The variation of the acoustic siphon effect with the seabed parameters and the impact on the characteristics of the VLF acoustic field were analyzed. The acoustic siphon frequencies are sensitive to the shear wave and thickness of the sedimentary layer. The acoustic siphon effect influences the propagation of normal modes
altering the interference structure and dispersion characteristics of the VLF acoustic field in shallow waters.
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