分层浅海海洋环境噪声场的射线预报方法

海洋环境噪声场是一个随地域、时间变化的复杂的场，现场快速预报对于环境匹配的声纳系统有重要意义。文章中利用射线声学模型计算了等声速分布、负梯度声速分布、正梯度声速、及任意声速分布条件下分层浅海海洋环境噪声场的指向性、噪声强度和相关函数随深度变化的规律。研究表明：分层浅海海洋环境噪声场与海底特性及声速分布有很大关系；利用射线预报方法可以快速预报分层浅海海洋环境噪声场。

Ray method for predicting ambient noise field in stratified shallow water

Rapid prediction of ambient noise field in complicated stratified shallow water that varies both with time and location is significant for a sonar system to match its environment. By using a ray method, the noise directionality, noise intensity and spatial correlation function versus depth is obtained for profiles with isovelocity, negative velocity gradient, positive velocity gradient and arbitrary velocity. The result shows that ambient noise field in stratified shallow water depends closely on the properties of sea bottom and the velocity profile. It is also demonstrated that the ray method is applicable to the rapid prediction of ambient noise field in stratified shallow water.