Experimental and Numerical Study on the Dispersion Patterns and Penetration Properties of MEFP with Seven Arc-Cone Liners

Abstract A new MEFP warhead with seven arc-cone liners which can form 7, 13 or 19 penetrators at different standoffs is designed. Dispersion patterns and penetration properties of MEFP are performed on five #45 steel targets of dimension 160cm x 160cm x 1.5cm at various standoffs (45cm, 60cm, 80cm, 120cm, 170cm). It reaches the conclusion that every surrounding liner is broken into three penetrators during the formation process of MEFP and a group of aimable penetrators consisting a central projectile surrounded by 18 penetrators is finally formed. Maximum divergence angle of surrounding penetrator is 9.8° and the damage area reaches 0.37m2 at 1.7m. A nonlinear surface fitting about perforations information on the targets at different standoffs provides a method of predicting the dispersion patterns of MEFP. Once initiated, damage probability for defeating light armor of MEFP warhead with seven arc-cone liners is significantly improved and the results provide important reference to the design and optimization of MEFP warhead in engineering.

摘要 本文设计了一款搭载7个弧形锥药型罩的新型多爆炸成型弹丸（Multiple Explosively Formed Projectile，MEFP）战斗部，该战斗部可在不同炸高条件下生成7、13或19枚侵彻体。为探究该MEFP的散布规律与侵彻性能，研究团队在45cm、60cm、80cm、120cm、170cm共5种炸高条件下，对5块尺寸为160cm×160cm×1.5cm的45#钢靶板开展了试验。研究得出结论：在MEFP成型过程中，每个外围药型罩可断裂为3枚侵彻体，最终形成由1枚中心弹体与环绕其周围的18枚侵彻体组成的可控侵彻集群。外围侵彻体的最大发散角为9.8°，在1.7m炸高下其毁伤面积可达0.37m²。通过对不同炸高下靶板的穿孔信息进行非线性曲面拟合，本文提出了一种可预测MEFP散布规律的方法。该七弧形锥药型罩MEFP战斗部起爆后，其对抗轻型装甲的毁伤概率得到显著提升，研究结果可为工程领域中MEFP战斗部的设计与优化提供重要参考依据。