基于射线理论的海洋中尺度涡与水声传播耦合建模研究

Couple Modeling of Mesoscale Eddy and Underwater Acoustic Propagation Based on Ray Theory

针对涡旋场景下水声传播特性预报问题,基于射线方法,研究了中尺度海洋涡旋与水声传播的耦合建模方法。该方法首先根据涡旋的基本特性,建立涡旋区域的温度场分布模型和水介质运动速度模型;由Mackenzie公式,计算声速分布;然后运用动态射线寻迹方法,建立水声传播模型,从而实现海洋学模型与水声传播模型的耦合。仿真分析表明:可以用它进行涡旋影响下水声传播规律的预报,并进而指导舰(潜)艇的战术动作。

Aiming at prediction of underwater acoustic propagation characteristics in the scene of eddy,based on the ray method,the paper researches the coupling modeling method of mesoscale eddy and underwater acoustic propagation.Basic principles of this method are that,first of all,according to the basic property of eddy,establish the temperature field distribution model and moving speed model of water medium in eddy area;calculate acoustic speed distribution with Mackenzie equation;and then with dynamic ray tracing method,establish an underwater acoustic propagation model to realize the couple between oceanographic model and underwater acoustic propagation model.Simulation analysis shows that it can be used to predict the law of underwater acoustic propagation influenced by eddy and to instruct the tactical operation of the surface warship or submarine.