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

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (22) : 261-267.

FAN Yiqing1, WANG Jiong1, XIE Quanmin2, XI Zhanwen1

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Abstract

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 mm3/μs2.

Key words

fuze / shaped charge jet / impact initiation / numerical simulation

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FAN Yiqing1, WANG Jiong1, XIE Quanmin2, XI Zhanwen1. Experimental and numerical simulation study on the shaped charge jet impact of a fuze[J]. Journal of Vibration and Shock, 2020, 39(22): 261-267

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