高斯射线束法在深海声源定位中的应用

在深海匹配场(Matched Field Processing-MFP)声源定位中,拷贝场模型的计算精度和速度对声源的定位效果和定位效率有着直接的影响。针对这一问题,本文数值仿真研究了深海匹配场定位中采用高斯射线束理论作为拷贝场计算模型的可行性。高斯射线束理论具有计算速度快,物理意义清晰,并且适合并行化处理等优点。文中利用不同水文环境、不同频域范围的大量仿真实验来证明该模型的适用性。结果表明,高斯射线束模型在深远海的声源定位中有很好的定位精度,并且在较低频段同样有效,可以作为深远海声源定位的拷贝场计算模型。

Application of Gaussian beam method in deep ocean matched-field localizations

In the passive source localization of matched-field processing (MFP) in deep ocean, the accuracy and efficiency of the replica model used in the full field calculation directly affect the performance. The feasibility of applying the Gaussian beam model to generate the replica field for source localization in MFP in deep ocean is studied using numerical simulation. A number of simulations are performed to validate this method in different environments and in different frequency domains. The results indicate that the use of the Gaussian beam model as the replica model features in high accuracy and is effective at low frequencies in matched-field source localization in deep ocean.