不平整海底环境下的浅海本征声线求解方法  

A method of seeking eigen-rays in shallow water with an irregular seabed

作　　者：张维 杨士莪 汤云峰 黄益旺 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2011年第12期1544-1548,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(11104045)

摘　　要：在三维浅海环境中,若不考虑不平整海底反射所带来的声线水平偏转,将会给声源方位估计等工作带来较大的误差,针对这一问题,通过建立不平整海底浅海环境下射线声学模型,提出了采用"补偿扫描法"搜索本征声线,计算了本征声线的传播时间.与理论传播时间对比的结果表明所提出的本征声线求解方法是可行的.在计算时,通过采用射线方程直接解海底反射点的方法,避免了一步一步跟踪声线轨迹,使得计算速度提高了将近2倍.For three dimensional （3 D） shallow water sound propagation, if the horizontal deflexion of a ray intro- duced by reflection on an irregular seabed is not taken into account, there will be a serious error in the source bear- ing. Therefore, the research of an eigen-ray model for shallow 3D water is of great significance for underwater a- coustics. In this paper, a compensation and scanning method was applied to seek eigen-rays, and respective trans- mission time was calculated based on the ray model in shallow water with an irregular seabed. The results contras- ting with the theoretical transmission time indicate that the method of seeking eigen-rays proposed in this paper is feasible. In the computation program, reflection points were directly derived from ray equations, avoiding ray trac- ing step by step and nearly doubling computing speed.

关 键 词：本征声线 三维浅海 传播时间 水平偏转 

分 类 号：TB566[交通运输工程—水声工程]