为了阐明复合杆式射流的性能,设计了8种不同材料的复合球缺罩,包括聚乙烯/铜、铝/铜、钛/铜、铁/铜、铜/铜、钼/铜、钽/铜、钨/铜材料,并采用LS-DYNA软件对其杆式射流的成型过程进行三维数值模拟,分析了杆式射流威力性能,通过静破甲试验验证了数值模拟结果.结果表明,在保持内罩材料为紫铜的条件下,随着外罩材料密度的增大,射流整体速度减小,射流动能随外罩材料密度的增大而减小;在外罩为金属材料时,外罩材料冲击阻抗越大,内罩所受爆轰波透射压力越小,射流整体速度、射流动能随外罩冲击阻抗增大而减小;经对比发现,聚乙烯/铜复合杆式射流整体速度最高,动能最大,破甲威力较佳,铝/铜复合杆式射流次之.静破甲试验结果表明,聚乙烯/铜复合杆式射流对钢靶侵彻深度较铝/铜复合杆式射流有一定提高,与数值模拟结果一致.%To clarify the performance of composite rod-type jet,eight kinds of composite ball imperfection covers with different materials,including polyethylene/copper,aluminum/copper,titanium/copper,iron/copper,copper/copper,molybdenum/copper,tantalum/copper and tungsten/copper,were designed,and three-dimensional numerical simulation of the forming process of rod-type jet was performed by LS-DYNA software,the power performance of the rod-type jet was analyzed,and the numerical simulation results were verified via static armor experiment.The results show that under the condition of keeping the inner cover material as red copper,the overall velocity of jet decreases with increasing the density of outer cover material,while the density of outer cover material increases with inner shell material is copper,and the kinetic energy of jet decreases with increasing the density of outer cover material.When outer cover is made of metal material,the greater the impact resistance of outer cover materials,the smaller the transmission pressure of the detonation wave in the inner cover,and the overall velocity and kinetic energy of the jet decreases with increasing the shock resistance of outer cover.By contrast,it is found that the overall velocity of polyethylene/Cu composite rod-type jet is the highest,the kinetic energy is the largest,and the armor is better,the aluminum/copper composite rod-type jet is the second.The experimental results of static armor show that the penetration depth of the steel/copper composite rod-type jet is better than that of the aluminum/copper composite rod-type jet,which is consistent with the numerical simulation results.
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