Threshold impact velocity for detonation initiation in high-density TATB explosive by flyer
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摘要: 采用实验与数值模拟相合的方法研究了飞片起爆钝感TATB炸药的性能。设计了飞片可靠起爆钝感TATB炸药的起爆序列，利用全光纤位移干涉测速系统分别测出飞片可靠起爆和未起爆TATB炸药的速度，初步确定飞片起爆钝感TATB炸药的起爆速度阈值。采用DYNA2D程序对飞片起爆TATB炸药过程进行数值模拟，模拟结果与实验结果相符合。Abstract: The experiments and the numerical simulations were carried out to investigate the characteristics in the initiation process of the TATB explosive by flyers.The initiation sequence was designed to initiate the high-density TATB explosive.The all-fiber displacement interferometer system for any reflector was used to measure the flyer velocities for the success and failure of the initiation in the TATB explosive, respectively.So the corresponding threshold flyer velocity was determined primarily.And the DYNA2Dprogram was employed to simulate the detonation process of the TATB explosive initiated by the flyer.The simulated results are consistent with the experiments.
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图 1 飞片起爆钝感TATB炸药实验示意图
Figure 1. Experimental sketch of initiation of insensitive TATB explosive by flyer
表 1 飞片起爆钝感TATB炸药的实验及结果
Table 1. Experiments and results of initiation of insensitive TATB explosive initiated by flyer
实验 初级装药 二次飞片 二级装药 三次飞片 结果 材料 d/mm h/mm d/mm h/mm 材料 d/mm h/mm d/mm h/mm 1 HNS-IV 4 4 4 0.11 - - - - - 未起爆 2 HNS-IV 4 4 4 0.11 HNS-IV 6.3 5 4 0.11 未起爆 3 HNS-IV 4 4 4 0.11 RDX 7.0 5 4 0.11 未起爆 4 HNS-IV 4 4 - - LLM-105 6.3 5 4 0.11 未起爆 5 HNS-IV 4 4 - - LLM-105 6.3 5 6 0.11 未起爆 6 HNS-IV 4 4 4 0.11 LLM-105 10.0 10 6 0.11 起爆 7 HNS-IV 4 4 4 0.11 LLM-105 10.0 10 10 0.11 起爆 
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