Effects of sediment acoustic characteristics on low-frequency acoustic field distribution in shallow water

作     者：ZHU Hanhao XIAO Rui ZHU Jun TANG Jun ZHANG Haigang ZHENG Guangxue ZHU Hanhao;XIAO Rui;ZHU Jun;TANG Jun;ZHANG Haigang;ZHENG Guangxue

作者机构：Institute of Marine Science and TechnologyZhejiang Ocean UniversityZhoushan 316022 State Key Laboratory of AcousticsInstitute of AcousticsChinese Academy of SciencesBeijing 100190 Institute of Naval Architecture and Mechanical-Electrical EngineeringZhejiang Ocean UniversityZhoushan 316022 Key Laboratory of Ocean Observation-Imaging Testbed of Zhejiang ProvinceZhejiang UniversityZhoushan 316021 College of Underwater Acoustic EngineeringHarbin Engineering UniversityHarbin 150001 

出 版 物：《Chinese Journal of Acoustics》 (声学学报（英文版）)

年 卷 期：2021年第40卷第1期

页      面：46-62页

核心收录：

学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (11704337) State Key Laboratory of Acoustics,Chinese Academy of Sciences (SKLA201907) Key Laboratory of Ocean Observation-Imaging Tested of Zhejiang Province (00IT20180F05) 

主　　题：basement shallow thick 

摘      要：Most of the published literatures on low-frequency underwater sound propagation are focused on the sound propagation features in the water column,while studies on sound propagation features in the sediment layer or the semi-infinite basement are *** this paper,based on the wave equation,a computational model for sound energy flux in the sediment layer and the basement as well as in the water column is proposed under a cylindrical coordinate *** this basis,the effects of various sediment acoustic parameters on the sound energy distribution and the corresponding mechanisms are elaborated through numerical examples and acoustic *** results reveal that,in a situation where sediment P-wave speedwater sound speed sediment S-wave speed,the greater the values of density and P-wave speed in sediment,the more likely it is that the sound energy remains in the water column without leaking to the sea ***,the influence of the variation of S-wave speed is *** influence on the sound propagation in the fluid layer is approximately negligible if the sediment layer is sufficiently thick.