浅海沉积层声学特性对声传播损失的影响仿真研究

为厘清海底沉积层声学特性信息的水声环境保障需求,构建浅海两层海底环境参数模型,并参考Hamilton海底底质9种分类设置沉积层声速、密度、衰减系数及厚度的参考值及计算采样区间,利用Kraken简振波模型,采用控制变量的方法,研究了浅海沉积层声学特性参数对声传播损失的影响;开展了建模理论推导及数值技术分析,研究了海底沉积层声学特性参数在模型计算过程中调用过程,并从建模计算的角度对仿真计算的结果进行解释,对海底沉积层声学特性调查装备发展及调查重点参数具有一定的参考价值。

Simulation study on the influence on sound propagation loss of sediment acoustic characteristics in shallow water

In order to clarify the requirements of seabed sediment acoustic characteristic information for underwater acoustic environment support,a two-layer seabed environmental parameter model of shallow water is constructed.The reference values and sampling interval of sediment sound velocity,density,attenuation coefficient and thickness are set,according to Hamilton nine classifications of sediments.The influence of acoustic parameters of shallow water sediments on sound transmission loss is studied,by using Kraken model and the method of control variables.Modeling theoretical derivation and numerical technology are carried out,and the processing procedure of acoustic parameters of seabed sediments in the model calculation is studied,in order to explain the simulation results from the perspective of modeling calculation.The simulation study in this paper is of certain reference significance to the development of investigation equipment and investigation key parameters of seabed sediments.