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以浅海声传播模型为基础,通过计算机仿真观察到以下物理现象:浅海中海底水平线列阵的匹配场定位性能优于其他深度水平线列阵.利用简正波建模方法揭示了这一现象的物理机理.按照简正波理论,各号模式的形状是海水深度的函数.通过比较不同深度上各号模式幅度的变化,发现海底模式幅值接近零的模式号数明显小于其他深度.这说明海底水平线列阵可以对更多号模式进行采样,进而获得更多的目标声源信息,取得更好的匹配场定位效果.
Based on the shallow sea acoustic propagation model, the following physical phenomena are observed by computer simulation: The matching field localization performance of the horizontal array in the shallow sea is better than that of other depth horizontal arrays, and the physical mechanism of this phenomenon is revealed by using the method of normal wave modeling. According to the theory of normal wave, the shape of each pattern is a function of the depth of the seawater. Comparing the variation of the amplitude of each pattern at different depths, it is found that the pattern numbers of the submarine patterns near zero are obviously smaller than other depths, Sampling for more number patterns, and then get more target sound source information, to achieve better matching field positioning effect.