聚能装药对引信的冲击试验与仿真研究

Experimental and numerical simulation study on the shaped charge jet impact of a fuze

为研究射流冲击作用下引信传爆序列的响应规律,开展了某钝感装药引信的射流冲击试验。通过观测残留药剂、壳体及见证板变形,判断传爆序列的爆轰程度。基于实爆试验数据,采用AUTODYN-3D软件进行传爆序列爆炸冲击波对见证板冲击响应数值仿真分析。通过数值分析,得到试验条件下传爆序列的压力、反应度随时间变化规律及见证板的毁伤情况,并进一步研究了带弹体引信的冲击响应过程,提出了钝感装药引信的临界起爆阈值。结果研究表明:试验条件下的引信传爆序列发生爆轰响应;数值模拟结果显示,简化模型响应结果与全引信响应结果相同,均为爆轰反应,简化方案可行;带弹体引信响应等级为爆轰;钝感装药引信传爆序列临界起爆阈值为46.08 mm 3/μs 2。

To study the reactions of a fuze explosive train during shaped charge jet impact,a charge jet experiment on an impact insensitive charge fuze was designed and carried out.By observing the remainder of the insensitive explosive and the deformation of the witness board,the explosive train reaction rate was judged.Based on the experiment data,using the Autodyn-3D finite software,simulation models considering the effects of shock waves produced by the explosive train and acting on the witness board were established and used to calculate the pressure,the reaction rate and the deformation of the witness board.The impact reaction process of the fuze with projectile was further studied and the threshold of impact initiation of the insensitive charge fuze by shaped charge jet was also calculated using the up-down method.The results show that the fuze explosive train is detonated in the shaped charge jet impact test.According to the numerical simulation results,the responses of some simplified components are the same as that of the full fuze.They are all detonation reactions.The simplified scheme is proved to be feasible.The reaction level of the fuze with projectile is detonation under the impact of shaped charge jet.The threshold of impacting initiation of insensitive charge fuze is 46.08 mm 3/μs 2.