基于BELLHOP声线模型的水声信道特性研究

Investigation of Underwater Acoustic Channel Properties Based on BELLHOP Rays Model

论文以BELLHOP声线模型为理论研究依据,研究了水声信道的相关特性。首先详细地讲述了BELLHOP声线模型的基本原理,推导了声线方程的基本公式,并以此公式作为BELLHOP计算的理论依据;接着运用BELLHOP计算了10条声线的传播路径;而后研究了声线的传播损失和时延随传播距离的变化关系;其次研究了海底反射损失与海底掠射角的变化关系;然后研究了声线的传播损失与深度的变化关系;最后研究了声线传播损失随传播距离的变化关系。

This manuscript has investigated the properties of underwater acoustic channel beased on the BELLHOP rays mod⁃el.Firstly,the fundermental principles of BELLHOP rays model are given out detailed.The basic fomulas of rays function are de⁃duced and the BELLHOP computions are done according to those fomulas.Secondly,the propagating paths of 10 underwater acous⁃tic rays are researched by the BELLHOP.Thirdly,the relationships of the transmision loss and the time delay with the propagating distance are investigated.Then the change of the ocean bottom reflection loss with the grazing angle is discussed.After that the acoustic rays propagating losses change with the depth and the propagating distance are studied.