反应装甲对射流的干扰机理研究

【作者】 董旭意；

【导师】 王晓鸣；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2008， 硕士

【摘要】 本文通过理论分析、试验和数值模拟相结合的方法研究了反应装甲对射流的干扰过程和干扰机理,建立了单层反应装甲对射流的间断干扰、连续干扰的理论模型以及双层平行反应装甲和V型反应装甲对射流干扰的分析模型。给出了射流被干扰后直径的变化、偏移角度、偏移量、残余射流的侵彻能力的计算方法。同时,通过实验得到了平面夹层炸药爆炸后对射流干扰的X光照片以及不同情况背板的飞散速度、面板对射流的干扰时间,比较了单层平面夹层炸药、双层平行夹层炸药、V型反应装甲对射流的干扰。得到反应装甲对射流干扰与射流入射角度、V形角的大小、反应装甲的结构等因素的关系。研究结果表明:平面夹层炸药爆炸后,运动的面板和背板对射流有严重的干扰和切割效应,使射流偏转、弯曲,着靶点分散,使侵彻能力下降。面板较厚时,射流穿孔直径相对较小,射流的逃逸时间较短,射流被切割的段数增加,对射流的干扰能力增强;射流速度越高,逃逸段速度差越大,相应逃逸射流较多,抗干扰能力越强,在主靶上侵彻形成主孔,后续的射流由于速度降低,抗干扰能力较弱,且偏移量加大,在主靶上形成直径较大的附坑。对于垂直侵彻,射流没有发生明显的偏转和弯曲,侵彻能力下降不明显。对于斜侵彻情况,平面夹层炸药结构使射流的侵彻能力大幅度下降,干扰约55%～75%;干扰程度随入射角度的增大而呈递增趋势。双层反应装甲和V型反应装甲对射流的干扰能力强于单层反应装甲。V型反应装甲的V形角变化时,对射流的侵彻能力有影响,但是影响程度不大。更多还原

【Abstract】 The disturbance process and mechanisms of the shaped charge jet by ERA are studied by the theoretic models ,numerical simulation and experiment methods in this paper. The discontinous and continous disturbance models of the shaped charge jet by the single lay sandwich, double lays parallel and the V-shaped structure ERA are established. The methods of calculating the variation of the diameter of the disrupted jet, excursion degree, the penetrating capability of the residual jet are given. the X-ray photography of the shaped charge jet by the sandwich explosive, the velocity of the plates of the explosive reactive armor, the disturbed time of the jet by the moving plates are obtained by the experiment. The disturbance capabilities of the single lay sandwich, double lays parallel and V-shaped sandwich structure to the jet are compared.The relation between the disturbance capability of the ERA and the impact angle of the jet, the V-shaped angle and the structure of ERA are attained.The research results show: the moving paltes have great disturbance and incision after the sandwich explosive ignites, they decrease the penetration capability of the jet through deviating the way of the jet, bending the jet and dispersing the impact point on the target. The diameter of the penetration hole of the jet is smaller, the time of the jet disturbed is shorter, the numbers of the breakup jets and the disturbance capability increase when the thickness of the plate is larger. The velocity difference between the jet head and tail is more, the amount of the escape jet and the ant-disturbance capability of the jet increase when the velocity of jet is high. The high velocity jet form the mail hole on the target ,and the low velocity jet form affiliated pits on the target because the ant-disturbance capability of the escape jet weaken, and the deviation is large. when the jet impacts the ERA normally, the deviation and bend of the jet are not obvious. When the jet impacts the ERA obliquely, the penetration capability redeues by 55%～75%. The disturbance capability increase with the increase of the impact angle. The disturbance capability of the double lays and V-shaped sandwich structure to the jet are stronger than the single sandwich. Variations of V-shaped angles can’t disturb observably penetration of jet.更多还原