目的 针对低密度材料壳体EFP战斗部EFP成形差、穿甲威力不足的问题,开展了EFP战斗部组合壳体设计研究。方法 通过数值仿真手段建立了不同材料壳体的EFP战斗部爆轰模型,获取了药形罩不同位置的超压和爆轰波冲量,分析了不同材料壳体对EFP成形的影响规律,通过数值仿真手段对不同嵌入位置的组合壳体方案的EFP成形情况进行了数值仿真和对比,研究了不同嵌入位置对EFP成形的影响,采用实验的方法对设计的组合壳体EFP战斗部的飞行稳定性和穿甲威力进行了验证。结果 数值仿真结果表明,在铝、钢、铜3种壳体材料中,钢壳体EFP战斗部对EFP驱动具有较高的超压峰值和最高的爆轰波超量,对EFP尾部的驱动较为平缓和持久,有利于EFP成形,在组合壳体的设计中,在铝壳体靠近药形罩位置内嵌钢环钢,有利于提高形成的EFP头部密实程度,提高EFP的穿甲能力,实验结果表明,设计的组合壳体EFP战斗部形成的EFP具有良好的飞行稳定性和穿甲威力。结论 在铝、钢、铜3种壳体材料中,钢材料是最有利于EFP成形的壳体材料,在组合壳体的设计中,在铝壳体靠近药形罩位置内嵌钢环,有利于提高爆轰时EFP尾部的爆轰波冲量,提高EFP的穿甲能力,通过对组合壳体EFP战斗部进行仿真和实验,达到了改善EFP成形、提高EFP穿甲威力的目的。
Abstract
To address the problems of poor Explosively Formed Projectile (EFP) formation and insufficient armor-piercing power of EFP warheads with low-density material shells, the work aims to conduct a combined shell design to improve the performance. Firstly, detonation models of EFP warheads with different shell materials were established by means of numerical simulation. The overpressure and detonation wave impulse at different positions of the liner were obtained to analyze the law of how shell materials affecting EFP formation. Then, numerical simulation and comparison were carried out on the EFP formation of combined shell schemes with different embedding positions, so as to study the effect of embedding positions on EFP formation. Finally, experiments were adopted to verify the flight stability and armor-piercing power of the designed combined shell EFP warheads. Numerical simulation results showed that among the three monolithic shell materials (aluminum, steel, copper), the steel shell EFP warhead provided a higher overpressure peak and the highest detonation wave impulse for EFP driving, and its driving effect on the EFP tail was relatively smooth and durable, which was beneficial to EFP formation. In the combined shell design, embedding a steel ring near the liner in the aluminum shell was conducive to improving the compactness of the EFP head and enhancing the EFP's armor-piercing capability. Experimental results indicated that the EFP formed by the designed combined shell EFP warhead had good flight stability and armor-piercing power. Among aluminum, steel and copper, steel is the most favorable shell material for EFP formation. In the combined shell design, embedding a steel ring near the liner in the aluminum shell helps to increase the detonation wave impulse at the EFP tail during detonation and improve the EFP's armor-piercing capability. Through the simulation and experiment of the combined shell EFP warhead, the goals of improving EFP formation and enhancing EFP's armor-piercing power are achieved.
关键词
EFP战斗部 /
数值仿真 /
组合壳体 /
EFP成形 /
静爆实验
Key words
EFP warhead /
numerical simulation /
combined shell /
EFP formation /
static detonation experiment
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