基于非等壁厚药型罩的准球形爆炸成型弹丸成型因素研究

Influence Factors on Formation of Quasi-Spherical Explosively Formed Projectile

采用试验验证过的数值模型,以爆炸成型弹丸速度、比动能和长径比为评价指标,系统地研究了装药长径比、药型罩内径、外径和药型罩中心厚度等对指标的影响规律,获得一种基于非等壁厚药型罩的准球形爆炸成型弹丸成型方案.结果表明基于非等壁厚药型罩的准球形爆炸成型弹丸成型规律不同于利用挡环形成的准球形爆炸成型弹丸,以及同样利用非等壁厚药型罩形成的长杆式爆炸成型弹丸.该爆炸成型弹丸成型方法结构简单,并可以实现较好的准球形爆炸成型弹丸外形和侵彻威力.

Compared to the stem shaped explosively formed projectile(EFP), the quasi-spherical EFP represents the advantages of insensitivity to the flying attitude, better penetrability and enhanced aftereffects. In this paper, a verified numerical model was used to study the influence factors of charge length-diameter ratio, liner inner radius, liner outer radius, and liner central thickness on the evaluation indexes of EFP velocity, specific kinetic energy and length-diameter ratio, aiming to develop a new formation method based on a non-uniform liner. The results show that the relative formation rules are different from that of the spherical EFP with baffle ring and that of the long EFP with the same liner and charge structures. The explosive formation process with quasi-spherical EFP is simple and the shape and the penetrability of the EFP can be improved. This research can provide valuable references for the design and optimization of quasi-spherical EFP.