Effects of oceanic ice cover and density stratification on the propagation of hydroacoustic waves  

作　　者：Ya-dong Liu Dong-qiang Lu Ming-song Zou 

机构地区：[1]Shanghai Institute of Applied Mathematics and Mechanics,School of Mechanics and Engineering Science,Shanghai University,Shanghai,200072,China [2]China Ship Scientific Research Center,Wuxi,214082,China [3]Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai,200072,China

出　　处：《Journal of Hydrodynamics》2022年第6期1151-1155,共5页水动力学研究与进展B辑（英文版）

基　　金：Projects supported by the National Natural Science Foundation of China(Grant Nos.12272215,11872239);the Innovative Research Foundation of Ship General Performance(Grant No.33122126).

摘　　要：The propagation characteristic of hydroacoustic waves is studied for an ideal compressible two-layer fluid with different densities covered by an elastic ice sheet.Boundary conditions are simplified by adopting linear assumption and then the dispersion relation is derived.The analysis and visualization of the dispersion relation present the introduction of compressibility leads to the appearance of hydroacoustic wave modes while the density stratification leads to the appearance of interfacial wave mode.Larger ice thickness and the density ratio of the two fluid layers increase the wave number and group speed of hydroacoustic waves at the same frequency while the phase speed decreases.

关 键 词：Ocean ice sheet density stratified fluid hydroacoustic propagation 

分 类 号：P343.6[天文地球—水文科学]