单双层壳体潜艇的高频回波特性研究

针对鱼雷主动声自导频段范围内潜艇目标的亮点特征问题,以Benchmark潜艇为模型,利用板块元方法和频率间接法研究了鱼雷自导声纳工作频段范围内,敷设吸声覆盖层前后单、双层壳体潜艇的回波亮点结构特征,对比了不同频率时亮点的差异,分析了敷设吸声材料对潜艇目标亮点结构特征的影响。研究结果表明,双层壳体与单层壳体潜艇回波亮点的区别主要体现在艏艉附近角度,两者在正横附近角度的差别则很小;在潜艇表面敷设的吸声覆盖层对回波亮点抑制作用较大,若鱼雷适当降低自导频段范围内发射信号的频率,潜艇内部结构还是能产生清晰的亮点。

High-frequency echo characteristics of single and double shell submarine

Based on the benchmark submarine model,the structural characteristics of highlight echoes of single and double shell submarines in the torpedo homing frequency range are studied with planar elements method.The difference of highlights at different frequencies is compared,and the influence of sound absorption material on the highlight echo is analyzed.The results show that the difference of highlight echoes between double shell and single shell submarines is reflected at the angles nearby bow and stern,while the difference in the vicinity of abeam is very little.The anechoic coating has great inhibitory effect on the highlight echo,but the highlight coming from the internal structures is also obvious as frequency decreasing.