摘要
为了确定Hexanitrostilbene-Ⅳ(HNS-Ⅳ)炸药在高压短脉冲作用下的全发火冲击起爆判据参数,采用Exploding Foil Initiation system(EFIs,爆炸箔起爆系统)驱动三种厚度的聚酰亚胺飞片(12.5,40μm和50μm)撞击HNS-Ⅳ炸药柱,用升降法进行发火试验,获得了三种厚度飞片对应的最小全发火充电电压,Photon Doppler Velocimetry(PDV)方法获得最小全发火充电电压下飞片的撞击速度分别为3400,3100 m·s^-1和2930 m·s^-1。基于冲击波理论和动力学仿真,分别获得三种厚度飞片在该撞击速度下撞击HNS-Ⅳ型炸药的界面压力p、界面粒子速度u和持续时间τ,通过数据拟合确定HNS-Ⅳ型炸药在高压短脉冲作用下的全发火冲击起爆判据参数。研究结果表明,对于装药密度为1.56 g·cm^-3的HNS-Ⅳ装药,在撞击界面压力为10~13 GPa和持续时间为4.0~8.7 ns的范围内,全发火pnt判据为:p2.88τ≥7.21。
The main purpose of this paper is to experimentally determine the all‐fire shock initiation criterion of Hexanitrostilbene‐Ⅳ(HNS‐Ⅳ)explosive under the impact of a short‐duration high pressure pulse.Up‐down tests of three kinds of polyimide flyers with different thicknesses(12.5,40μm and 50μm)were carried out using Exploding Foil Initiation system(EFIs)in order to determine the minimum all‐fire charging voltage.Using Photon Doppler Velocimetry(PDV)technology,the impact velocity of the three flyers under their minimum all‐fire conditions was obtained.On this basis,the interface pressure p,particle velocity u and durationτof the three kind of flyers impacting onto HNS‐Ⅳexplosive were calculated based on shock wave theory and dynamic simulation.Furthermore,the all‐fire shock initiation criterion of HNS‐Ⅳexplosive under the impact of short‐duration high pressure pulse was finally determined by data fitting.Results show that the all‐fire pnτcriterion for HNS‐Ⅳwith charge density of 1.56 g·cm^-3 explosive is p2.88τ≥7.21 in the range of 10-13 GPa and 4.0-8.7 ns.
作者
王万军
祝明水
郭菲
吕军军
杨爽
付秋菠
WANG Wan⁃jun;ZHU Ming⁃shui;GUO Fei;LÜJun⁃jun;YANG Shuang;FU Qiu⁃bo(Institute of Chemical Materials,CAEP,Mianyang 621999,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2020年第6期569-575,共7页
Chinese Journal of Energetic Materials
基金
国家自然科学基金资助(11872342)。
