The prediction of the fragment velocity distribution of a cylindrical cased charge with end caps is one of the key issues to assess the damage efficiency of the warhead. However, limited work has been conducted to predict the fragment velocity distributions along the axis of cylindrical cased charges with end caps. This paper presents a study of the velocity distribution of fragments caused by the explosion of a cylindrical cased charge with end caps. The fragment velocity distribution and the end cap velocity were determined by an X-ray radiography method, and the axial fragment distribution was determined by witness plates. It was found that the velocities of fragments, especially near the edge, were increased when the end caps were added, and the position of maximum velocity is closer to the non-detonation end. The fragment velocities were increased, and the fragment projection range was decreased with the increase of the thickness of the end cap. A formula for fragment velocity distributions of a cylindrical cased charge with end caps, which is based on Huang’s formula, was proposed by the theoretical analysis and data fitting and validated experimentally. The results indicate that the proposed formula is accurate in predicting the fragment velocity distribution along the axis of a cylindrical cased charge with end caps detonated at one end.

带有端盖的圆柱状装药的碎片速度分布的预测是评估弹头伤害效率的关键问题之一。然而，已经进行了有限的工作来预测沿带有端盖的圆柱状装药炸药的轴线的碎片速度分布。本文介绍了由带端盖的圆柱状装药炸药爆炸引起的碎片速度分布的研究。通过X射线照相法确定碎片速度分布和端盖速度，并通过见证板确定轴向碎片分布。发现当添加端盖时碎片的速度，特别是边缘附近的速度增加，并且最大速度的位置更接近非爆轰端。随着端盖厚度的增加，碎片的速度增加，碎片的投射范围减小。通过理论分析和数据拟合，提出了基于黄氏公式的带端帽圆柱状装药的碎片速度分布公式，并进行了实验验证。结果表明，所提出的公式可准确预测沿端部引爆端部的圆柱状装药的炸药的速度分布。