水声传播的高斯波束跟踪方法研究  

Beam Tracing Theory for Underwater Acoustic Propagation Modeling

作　　者：姚万军[1,2] 蔡志明[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033 [2]海军兵种指挥学院,广州510430

出　　处：《武汉理工大学学报（交通科学与工程版）》2010年第3期604-607,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家安全重大基础研究项目资助(批准号:5131603ZT40317)

摘　　要：分析了高斯波束跟踪方法计算水声场的理论,综合其数值实现时的初值确定以及一种海底反射系数的计算方法.针对接收器位于界面附近时声场计算值偏小的问题,分析了其原因并引入和运用虚射线概念,给出了一种改进的算法流程.结合数值算例进行了仿真分析,并与kraken的计算结果进行了比较,在实例所用海洋声速剖面环境和声源接收器几何配置下,二者都具有较好的一致性.结果表明,改进算法能较好地解决上述接收器位于界面附近时声场计算值偏小的问题.The modeling of underwater acousitic propagation with Gaussian beam tracing was studied.The initial conditions and a method of calculating bottom reflection coefficient during the numerical realization were also synthesized.The reason for the underestimation of the propagation loss near the boundary with this method was analyzed,and an improved algorithm pattern with the introduction of virtual rays was presented.Results of simulation with this algorithm under the circumstances of some ocean sound speed profiles and source-receiver geometries accorded well with that of kraken.It shows that the improved algorithm is a good solution to the above deficiency.And Gaussian beam tracing is a promising alternative to the conventional ray theory for the computing of underwater acoustic propagation.

关 键 词：水声传播建模 波束跟踪 高斯波束跟踪 射线模型 

分 类 号：O427.1[理学—声学]