This work introduces a novel fragmentation warhead that can produce two groups of fragments with different velocity characteristics and strike the target sequentially. The two groups of fragments come from two separate casings in one warhead, and the different velocities of fragments from different groups are attained by having a charge compartment sandwiched between the two casings in the warhead. A theoretical analysis formula is established to predict the maximum velocity of fragment from each casing based on energy balance. The results of X-ray radiography experiment and 3D smooth-particle hydrodynamics numerical simulation indicate that the proposed formula is accurate and reliable in calculating the fragment velocity as long as the thickness of the inner casing is less than 30% the radius of the inner charge. The fragment velocities of warheads with different structure are further analyzed, and the results show that the fragments of the two casing exhibit greater disparity in their maximum velocity when more charge is packed in the sandwiched compartment instead of enclosed in the inner casing.

这项工作介绍了一种新型的破片弹头，它可以产生两组不同速度特性的破片并依次打击目标。两组破片来自一个弹头中的两个独立的外壳，不同组的破片的不同速度是通过在弹头中的两个外壳之间夹一个装药隔室来实现的。建立了基于能量平衡预测各套管破片最大速度的理论分析公式。X射线照相实验和3D光滑粒子流体动力学数值模拟结果表明，只要内套管厚度小于内装药半径的30%，该公式计算破片速度是准确可靠的。 .