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孤立子内波是浅海大陆架海域普遍存在的水文现象,它的存在将改变海水稳定分层的声速、密度剖面,引起声场结构的改变。应用抛物方程方法研究二维与三维情况下浅海孤立子内波对声传播损失的影响,并研究孤立子内波的存在对水平阵波束形成定位的影响。通过仿真结果,对常规波束形成、MVDR及MUSIC等波束形成方法进行比较。
The soliton internal wave is a common hydrological phenomenon in the shallow sea continental shelf. Its existence will change the sound velocity and density profile of stable stratification of seawater and cause the change of sound field structure. The parabolic equation method is used to study the influence of internal solitons of shallow sea solitons on acoustic propagation loss in two-dimensional and three-dimensional cases. The effect of soliton inner waves on the horizontal beam formation and localization is also studied. Through the simulation results, the beamforming methods such as conventional beamforming, MVDR and MUSIC are compared.