金属飞片起爆间隙对TATB基炸药到爆轰距离的影响  

The effect of the flying gap of the metal flyer on the run distance to detonation of TATB-based explosives

作　　者：郭刘伟[1] 刘宇思[1] 王伟[1] 何雨 桂毓林[1] GUO Liuwei;LIU Yusi;WANG Wei;HE Yu;GUI Yulin(Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621999,Sichuan,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《爆炸与冲击》2025年第4期41-47,共7页Explosion and Shock Waves

摘　　要：为获得间隙尺寸对金属飞片起爆TATB基钝感炸药到爆轰距离的影响,采用激光测速技术和太赫兹波测速技术,对不同间隙飞片起爆TATB基钝感炸药的动作过程开展了实验研究,获得了钛飞片在0~20 mm间隙内的速度发展历程、击靶速度及形貌,给出了TATB基钝感炸药在不同起爆间隙下的到爆轰距离。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,与飞片的速度及结构特性相关。飞片起爆炸药的5个速度阶段中,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及层裂层与飞片主体融合过程中的飞片起爆能力最弱。To discuss the flying gap effect of the metal flyer on 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 a 1550 nm photon Doppler velocimetry.The running distance to detonation(RDTD)of explosive samples was gained by a Terahertz-wave Doppler interferometric velocimetry at the center point.The relationship between the experiment data captured above was analyzed.It reveals that the running distance to detonation of the TATB-based explosive changes nonmonotonously with the increase of gap.With the gap increasing from zero to 20 mm,there are five stages.The initial stage is named S0,the flyer velocity declining stage is named S1,the free running stage of spallation is named S2,the remerging stage when the main flyer catches up and remerging with its spallation layer is named S3,and the stage when the main flyer and spallation are united as one is named S4.The RDTD for the TATB-based explosive is the smallest when the flyer velocity comes to stage S4,the RDTD at stage S0 is the next,and the RDTD at the velocity declining stage S1 and remerging stage S3 are the worst together.These experiment results suggest that the initiating performance of TATB-based explosives impacted by the flyer is not always better than the gap layer results.The initiation mechanism of explosives by flyer under different gaps is probably related to the target velocity together with the structure of the flyer.The simplex target velocity rising of flyer can’t always make the running distance to detonation of TATB-based explosives shorter.The initiation mechanism of TATB-based explosives impacted by flyer is more complex than the gap layer,requiring much experiment data and numerical simulation for further discussion.

关 键 词：TATB钝感炸药 到爆轰距离 间隙尺寸 飞片速度 

分 类 号：O381[理学—流体力学] TJ55[理学—力学]