活性横向增强弹靶后横向效应实验与数值模拟

Experimental and Numerical Research on Behind-plate Enhanced Lateral Effect of Reactive PELE

为揭示活性横向增强弹(Penetrator with Enhanced Lateral Effect,PELE)的靶后横向增强机理,开展活性PELE冲击钢靶毁伤效应实验,在钢靶后设置效应铝靶,得到不同前置钢靶厚度条件下的穿孔毁伤情况。基于点火增长模型建立活性PELE冲击爆燃反应过程的两步仿真分析模型。综合实验和仿真对活性PELE在780 m/s速度条件下冲击6~20 mm厚度范围内钢靶的靶后横向增强效应进行讨论,从效应靶毁伤、芯体反应、波相互作用及壳体破片飞散4个方面进行深入分析。分析结果表明:仿真分析模型有效模拟了活性PELE冲击靶板的爆燃反应过程;靶板厚度对活性PELE在效应靶上的穿孔散布尺寸影响显著,随着靶板厚度的增加,活性PELE的靶后横向增强效应先增大后减小;活性芯体的爆燃反应释能使壳体最大径向速度提高了40%以上。

To reveal the behind-plate enhanced lateral mechanism of reactive penetrator with enhanced lateral effect(PELE),the damage effect experiment of reactive PELE impacting steel plate is made to obtain the perforation damage of witness aluminum plate set behind the steel plate under the conditions of different front steel plate thicknesses.A two-step numerical simulation model of reactive PELE impact-induced deflagration reaction is developed based on the ignition growth model.The behind-plate enhanced lateral effect of reactive PELE impacting a steel target with a thickness of 6-20 mm at 780 m/s velocity is discussed by experiment and simulation.The damage effect of witness aluminum plate,filling reaction,wave interaction and jacket fragments dispersion are analyzed.The results show that the numerical simulation model can effectively simulate the deflagration reaction of reactive PELE impacting plate.The perforation dispersion on the witness plate significantly depends on the front steel plate thickness,the behind-plate enhanced lateral effect of the reactive PELE increases first and then decreases with the increase in the plate thickness,and the released energy of the reactive filling increases the maximum radial velocity of jacket fragments by more than 40%.