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爆炸箔起爆器(EFI)是一种直列式安全起爆装置,对静电、冲击、射频等有着较强的抗干扰能力。飞片是EFI的关键部件,为研究飞片参数对EFI中主装药的冲击起爆临界速度的影响规律,利用LS-DYNA软件,对聚酰亚胺飞片冲击起爆HNS-IV的过程进行了仿真,获得了不同直径及厚度飞片的冲击起爆速度阈值,并对飞片着靶姿态进行了讨论。仿真结果表明,相同直径的飞片,当厚度超过0.14μm后,起爆速度阈值变化趋于平缓;相对平板型飞片,倾斜板起爆速度阈值显著提高,且以相同速度撞击时,倾斜板起爆时间也明显滞后。
Explosion Foil Initiator (EFI) is an in-line safety detonator, which has strong anti-interference ability against static electricity, impact, radio frequency and the like. In order to study the influence of flyer parameters on the critical initiation speed of EFI in charge of main charge, fly-film is the key component of EFI. By using LS-DYNA software, the impact of polyimide flyer on HNS-IV was explored The thresholds of the impact detonation velocity of the flyer with different diameter and thickness were obtained, and the target attitude of the flyer was discussed. The simulation results show that when the thickness is over 0.14μm, the detonation velocity threshold tends to be flat. Compared with the flat-type flying film, the detonation velocity threshold of the inclined plate increases significantly. At the same speed, the initiation time of the inclined plate Obviously lagging behind.