对称刻槽预控破片战斗部壳体爆炸过程质量损失率研究

为研究对称刻槽预控破片战斗部壳体爆炸过程质量损失率，在分析轴向刻槽与周向刻槽引起的壳体断裂迹线走向问题基础上，获得了壳体爆炸质量损失来源,提出了壳体爆炸质量损失率计算模型。对典型战斗部壳体爆炸质量损失率进行理论计算，设计了两种模拟战斗部，进行了水井静爆试验。试验结果与理论分析表明：壳体在爆炸过程中，壳体上沿轴向方向刻槽会促使壳体在刻槽根部延伸出两条对称的断裂迹线，壳体上沿周向方向刻槽会促使壳体在刻槽根部仅延伸出一条断裂 迹线；壳体上沿轴向刻槽是壳体产生爆炸质量损失的原因，刻槽深度越大，壳体爆炸质量损失率越小；该模型计算结果与试验结果的偏差小于8%.

Research on the Explosion Mass Loss Rate of Pre-formed Fragment Warhead Shell with Symmetric Groove

The fracture path of shell caused by the axial groove and circumferential groove is analyzed to study the explosion mass loss rate of pre-formed fragment warhead shell with symmetric groove.The source of explosive mass loss is determined.The explosion mass loss rate of typical warhead shell is calculated in theory.Two kinds of simulated warhead were designed,and the static explosion test was carried out under water.The test results and theoretical analysis show that,in the process of explosion,the axial groove on the shell causes two symmetrical fracture traces from the groove root,the circumferential groove on the shell causes only one fracture trace from the groove root.The explosion mass loss rate of shell is caused by axial groove.The greater the groove depth is,the smaller the mass loss rate of shell explosion is.The difference between theoretically calculated and experimental mass loss rates is less than 8％.