海底底质特性对浅海声传播影响分析  

Analysis of the impact of seabed substrate characteristics on the shallow sea sound propagation

作　　者：邓玉芬 蒋其伟 吴双林 何孟飞 DENG Yufen;JIANG Qiwei;WU Shuanglin;HE Mengfei(Naval Research Institute,Tianjin 300061,China;92292 Troops,Qingdao 266500,China;Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]海军研究院,天津300061 [2]92292部队,山东青岛266500 [3]中国科学院声学研究所,北京100190

出　　处：《海洋测绘》2023年第4期33-37,共5页Hydrographic Surveying and Charting

摘　　要：海底底质特性参数是海洋声传播的关键影响因素,特别是对声波在浅海环境中的传播具有重要影响。为分析底质特性参数对浅海声传播的影响规律,在浅海环境下利用RAM抛物方程模型,对单层海底、双层海底声学参数模型及不同声源频率下的不同海底声速、声吸收系数、密度、沉积层厚度等底质特性参数对声传播损失进行模拟仿真,通过仿真结果表明:在浅海环境下海底声速对声传播影响最大,近距离时声吸收系数对声传的影响小于海底声速;海底密度对声传播的影响整体上较小;沉积层厚度在声源频率较低时对声传播影响较大。The characteristics of the seabed are the key influencing factors of sound propagation,especially in shallow water.In order to analyze the influence of bottom acoustic parameters on sound propagation in shallow water,we simulate the transmission loss by using RAM parabolic equation model in shallow water,and the single-layer seafloor,double-layer seafloor and different bottom parameters such as sound speed,attenuation coefficient,density and sedimentary layer thickness at different sound source frequencies are considered.The simulation results show that the sound speed of the seabed has the greatest impact on the sound propagation in shallow water.The influence of the attenuation coefficient on sound propagation is less than that of the sound speed at near range.The influence of seabed density on sound propagation is generally small,and the thickness of the sediment layer has a greater impact on acoustic propagation when the frequency of the sound source is low.

关 键 词：海底底质特性 声传播 海底声速 海底声吸收系数 海底密度 沉积层厚度 

分 类 号：P229.3[天文地球—大地测量学与测量工程]