深海会聚区波导不变量特征研究及应用

Characters and application of waveguide invariant in deepocean convergence zone

为了解决深海会聚区目标及其运动态势难以判断的问题,在研究会聚区形成条件和其声场传播规律以及波导不变量理论的基础上,对典型深海环境不同位置的声强距离-频率分布图中的干涉条纹特征进行理论分析和仿真验证。结果表明,深海会聚区存在与其他区域不同的干涉条纹特征,其对应的波导不变量?值为负。本文提出了利用会聚区特有的干涉条纹特征,对会聚区目标及其运动态势进行初步判断的方法,仿真结果和试验数据表明,判断方法具有可行性和有效性。

In order to solve the difficulties in judgment of whether target is in convergence zone （CZ） as well as its movement in CZ, by analyzing formation conditions of CZ and its acoustic propagation, the characters of waveguide invariant in deep-ocean were analyzed based on waveguide invariant theory and the simulation tests were performed. The theoretical analysis and simulation results both show that there were special waveguide invariant striations in CZ and the valve of its waveguide invariant β was negative. Using these characters, the method to judge whether target is in CZ and the its movement in CZ was proposed and simulated. The simulation and experimental data both show that the judgment was valid.