CAJ | 학술논문

在浅海环境中，声速剖面和海底深度在水平方向上的变化都会对声传播产生较大的影响。将声速剖面用前几阶经验正交函数来表示，在一定范围的海域各阶经验正交函数系数可以近似为随水平距离线性变化，提出了一种非分层海洋中的声线计算方法，可以计算到达接收水听器的本征声线和传播时间。该方法计算速度快，计算精度较高，可以用于海洋中的声速剖面快速反演。
재천해배경중，성속부면화해저심도재수평방향상적변화도회대성전파산생교대적영향。장성속부면용전궤계경험정교함수래표시，재일정범위적해역각계경험정교함수계수가이근사위수수평거리선성변화，제출료일충비분층해양중적성선계산방법，가이계산도체접수수은기적본정성선화전파시간。해방법계산속도쾌，계산정도교고，가이용우해양중적성속부면쾌속반연。
The horizontal variations of sound speed profile and ocean water depth have a significant effect on acoustic propagation in shallow sea water.Here,a method for calculating sound travel time based on the ray theory in unstratified ocean was proposed.An efficient algorithm was applied to seek eigen acoustic rays arriving at hydrophones. The sound speed profile could be described approximately using empirical orthogonal functions (EOFs)with a proper precision.The coefficients of EOFs vary linearly with horizontal distance in a certain sea area.It was shown that the proposed method can be used to calculate the travel time of eigen-acoustic rays arriving at hydrophones rapidly with a higher precision,it can be used for fast inversion of sound speed profile in ocean.