深海地形对声传播特性的影响

Effects of Deep-sea Topography on Acoustic Propagation Characteristics

为了研究深海海底环境对声传播特性的影响,建立了深海海底地形模型,通过BELLHOP模型仿真深海声道声速分布下不同海底地形的声传播特性,定量分析了“山地”、“海盆”以及平坦海底三种典型深海地形下,接收深度分别为500 m、1 km、3 km、4 km时的声传播特性差异,并利用本征声线的传播和时间到达结构进行了物理解释,研究成果对深海环境下声呐装备的作战使用具有指导意义。

In order to study the influence of deep seabed environment on acoustic propagation characteristics,a deep seabed terrain model is established.The BELLHOP model is used to simulate the acoustic propagation characteristics of different seabed terrains under the sound velocity distribution of deep seabed acoustic channel.The differences of acoustic propagation characteristics under three typical deep seabed terrains of“mountain”,“basin”and flat seabed are quantitatively analyzed when the receiving depths are 500 m,1 km,3 km and 4 km,respectively.The physical interpretation is carried out by using the propagation and time arrival structure of the intrinsic sound line.The research results have guiding significance for the combat use of sonar equipment in deep seabed environment.