改性B炸药的做功能力研究

为了解添加剂对B炸药做功能力的影响,分别添加VP-501、123树脂/DES和HTPB/MDI制备了4个改性配方（B-2、B-3、B-4和B-6）。用电探针和锰铜压力计分别测定改性B炸药的爆速和爆压,同时用VLW程序计算爆轰性能参数;应用有限元动力学程序LS-DYNA对改性B炸药的标准圆筒试验进行数值模拟,获得爆轰产物的JWL状态方程参数和铜管外壁径向膨胀距离与比动能曲线,分析了提高熔铸炸药能量的途径和方法。结果表明,改性B炸药的爆速和爆压理论计算值和实验值比较接近,获得了较好结果;B炸药中加入添加剂后,密度减小,爆速和爆压、壁速和比动能降低,而且添加数量越多,爆速和爆压、壁速和比动能降低越大。添加HMX和Al粉能提高熔铸炸药的做功能力。

Work Capacity of Modified Composition B

To understand the effect of supplement on the work capacity of composition B, the four modified formulations （B-3, B-4, B-5 and B-6） have been made by accede to VP-501, 123 resin/DES and HT- PB/MDI respectively. The detonation velocity and detonation pressure of modified composition B have been measured by ionization probes and manganin gauges, and their detonation property parameters have been computed by means of the VLW code. Standard cylinder tests of modified composition B were mod- eled using the finite element hydrodynamic code LS-DYNA, the parameters of the JWL equation of state for detonation products and the relationship curves between expansion distance and specific kinetic energy were obtained. The ways to improve the energy of melt-castable explosive were discussed. The results show that the calculation value of detonation velocity and detonation pressure agrees well with the experimental value. After accede to the supplements, the density, detonation velocity and detonation pressure, the ex- pansion velocity and specific kinetic energy are all reduced. More add, more reduce. What＇ s more, accede to HMX and A1 powder can improve the energy of the meh-castable explosive.