截顶式聚能装药战斗部射流成形规律研究

Study on jet forming law of truncation shaped charge warhead

以Φ88 mm装药直径直锥式聚能战斗部为设计参照,采用数值模拟方法对比了无截顶和有截顶聚能装药战斗部的爆轰波传播规律和射流成形特征,揭示了截顶式聚能装药战斗部的射流成形机理。在此基础上,通过改变截顶直径和厚度,计算了25个工况的截顶式聚能装药结构射流成形过程,分析了截顶结构参数对截顶式聚能装药射流长度和头部速度的影响规律。结果表明:截顶装置的存在改变了爆轰波的应力场分布,储存了更多加载在药型罩表面的爆炸能量,同时增大了爆轰波对药型罩的压垮角,并进一步提高了射流成形性能;射流头部速度和射流长度随截顶直径增大先增大后减小,随截顶厚度增大而增大。研究结果可用于指导截顶式聚能装药战斗部结构设计。

Taking theΦ88 mm straight cone shaped charge warhead as the design reference,the detonation wave propagation law and jet forming characteristics of shaped charge warhead with and without truncated top were compared by numerical simulation method,and the jet forming mechanism of truncated shaped charge warhead was revealed.On this basis,the jet forming process of truncated shaped charge under 25 working conditions was calculated by changing the diameter and thickness of the truncated top,and the influence of the structural parameters on the jet length and head velocity of the truncated shaped charge was analyzed.Results showed that the existence of the top cutting device changed the stress field distribution of detonation wave,saved more explosion energy loaded on the surface of the liner,increased the collapse angle of the detonation wave liner,and further improved the jet forming parameters;the jet tip velocity and jet length first increase and then decrease with the increase of the truncation diameter,and increase with the increase of the truncation thickness.The results can be used to guide the structural design of truncated shaped charge warhead.