The gap size effect of flyer on the run distance to detonation for TATB based explosives
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摘要: 摘要:为了获得间隙尺寸对飞片起爆TATB基钝感炸药到爆轰距离的影响特性,采用激光多普勒测速技术及瞬态太赫兹波多普勒干涉测速技术对不同间隙飞片起爆TATB基钝感炸药的动作过程开展实验研究,获取了钛飞片在0~20 mm间隙内的速度发展历时、击靶速度及形貌,给出了TATB基钝感炸药在不同间隙起爆下的到爆轰距离。结果表明:随着起爆间隙的增大,TATB基钝感炸药的到爆轰距离呈非单调变化特征,与飞片速度所处阶段相关。飞片起爆炸药的五个速度阶段中,处在飞片主体与层裂层融合完成阶段的飞片起爆能力最强,隔层起爆次之,层裂层发生前的速度衰减阶段与层裂层-飞片主体融合过程中的飞片起爆能力最弱。
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关键词:
Abstract: Abstract: In order to discuss the gap size effect of flyer to the initiating behavior for TATB based explosives, initiation experiments for PBX-6 and PBXL-7 were performed. The target velocity and shape of the flyer to explosives were obtained using by 1550nm Photon Doppler velocimetry. The running distance to detonation of explosive samples were gained by Terahertz-wave Doppler interferometric velocimetry. The relationship between the experiment data captured above were analyzed. It reveals that the running distance to detonation of the TATB based explosive change non-monotonously with the increase of the gap size. With the increase of gap size from zero to 20 mm, the target velocity of the flyer stay at the gap layer initiation stage named S0, the velocity declining stage named S1 for the flyer, the free running stage of spallation named S2, the remerging stage of the flyer with its spallation named S3 and united as one flyer stage named S4 respectively. The running distance to detonation for TATB based explosives is the smallest when the flyer velocity stay at the stage S4, the result at the stage S0 which means the gap layer initiating status is the next, the results at the velocity declining stage S1 and remerging stage S3 are the worst together. These experiment results suggest that the initiating performance of flyer to explosives is not always better than gap layer. The initiation mechanism of flyer to explosives with different gap sizes probably is related to the target velocity together with the structure of flyer.-
Key words:
- TATB based explosive /
- running distance to detonation /
- gap size /
- flyer velocity
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