负跃层对主动声纳探测距离影响仿真研究

Simulation Research on the Effects of Negative Thermocline on the Detection Range of Active Sonar

摘要:

简要分析了声波穿过负跃层时的传播特性,结合潜艇利用跃变层规避主动声纳探测的战术背景,对负跃层影响主动声纳的探测距离进行了研究。建立了主动声纳搜潜的数学模型,利用平滑平均声场理论估算了存在负跃层时的声传播损失,分析了负跃层深度、厚度以及声速跃变差对主动声纳探测距离的影响,并进行了仿真。结果表明,负跃层对主动声纳的探测距离有明显影响。

Abstract:

The propagation characteristics of shallow water channels when exiting negative thermocline was analyzed. According to the tactical background that submarines using negative thermocline to escape active sonar, the effects of negative thermocline on the detection range of active sonar were studied. The mathematical models were built. The transmission loss was given out based on smooth averaged sound field theory in shallow water. The effects of thermocline’s depth, thickness and sound velocity change on detection range of active sonar were discussed, and lastly according to the parameters of sonar simulations were made. The research results showed that negative thermocline had an important effect on detection range of active sonar.