浇注六硝基六氮杂异伍兹烷基混合炸药驱动性能

Metal Accelerating Ability of Castable CL-20-based PBX

为研究浇注六硝基六氮杂异伍兹烷(CL-20)基混合炸药的金属驱动特性,制备了CL-20∶端羟基聚丁二烯(HTPB)∶Al-Zn配比为84∶11∶5的浇注CL-20基炸药试样GWL.测试GWL密度、爆速、爆压、机械感度以及快速烤燃、慢速烤燃和枪弹撞击3项不敏感特性,发现其炸药密度为1.78 g/cm 3、爆速为8750 m/s、爆压为33.21 GPa,不敏感试验反应等级均为燃烧,机械感度也符合炸药使用要求。采用50 mm标准圆筒试验测试了GWL炸药试样的做功能力,发现GWL炸药试样驱动圆筒在41 mm特征点上的速度为1730 m/s.应用有限元分析软件Autodyn时圆筒试验过程进行数值模拟计算,通过对比试验结果与数值模拟结果,得到GWL炸药的JWL状态方程;设计CL-20∶HTPB配比为89∶11的无金属粉炸药试样GC,在相同试验条件下测试了GC的机械感度与爆炸驱动能力,结果表明GC与GWL两种炸药试样驱动能力相当,但是GC炸药的机械感度高于GWL炸药。采用Autodyn软件建模对比研究了GWL炸药与C-1炸药和LX-14炸药的驱动能力,结果显示:GWL炸药驱动破片的终速比LX-14炸药高2.6%;其驱动性能优良,是一种高能低感度的新型CL-20基浇注炸药。

A cast CL-20-based explosive,named GWL,with the ratio of 84%CL-20,11%HTPB and 5%Al-Zn alloy powder was prepared to study the metal accelerating characteristics of castable Cl-20-based composite explosive.The density,detonation speed,detonation pressure,mechanical sensitivity,and three insensitivity characteristics,including fast firing,slow firing and bullet impact of GWL,were tested.The results show that the density of GWL is 1.78 g/cm 3,the detonation velocity is 8750 m/s,the detonation pressure is 33.21 GPa,the reaction level of insensitivity test is combustion,and the mechanical sensitivity also meets the requirements of explosives.The accelerating ability of GWL explosive specimen was tested by a 50 mm standard cylinder test.The test results show that the expension speed of GWL explosive specimen driving the cylinder at 41 mm characteristic point is 1730 m/s.The cylinder test process is numerically simulated and calculated using the finite element analysis software Autodyn.The JWL equation of state of GWL explosive was obtained by comparing the test results with the numerically simulated results.A control group named GC with the ratio of 89%CL-20 and 11%HTPB was prepared.The mechanical sensitivity and explosive driving ability of GC were tested under the same experimental conditions.The results show that the accelerating abilities of GC and GWL are the same,but the mechanical sensitivity of GC is higher than that of GWL.At last,the accelerating abilities of GWL,C-1 and LX-14 explosives are studied by using AUTODYN software.The results show that the final velocity of GWL is 2.6%higher than that of LX-14.It is a new type of CL-20 based cast explosive with high energy and low sensitivity.