He Xiang, Yang Lixin, Dong Haiping, Lv Zhixing, Yan Nan
State Key Laboratory of Explosion Science and Technology, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China.
Micromachines (Basel). 2023 Jan 26;14(2):312. doi: 10.3390/mi14020312.
In order to study the performance of ultra-fine 2,2', 4,4', 6,6'-hexanitrostilbene (HNS-IV) explosives initiated by a microflyer driven by microsized lead azide (Pb(N)), a corresponding simulation model was established in Autodyn software, and the accuracy of the simulation model was verified with a photonic Doppler velocimeter (PDV). Various influencing factors were studied in combination with the power flux-action time (-) initiation criterion. The results showed that the exponential growth rate of the flyer velocity decreased with an increase in the diameter and height of the lead azide and that the influence of the charge diameter was more obvious than that of the charge height. The flyer velocity increased linearly with the density of the lead azide. The velocity of the flyer also increased linearly with an increase in the shock wave impedance of the restraint materials, and the velocities of the flyer that corresponded to silicon and organic glass were lower than those of the metal materials. The flyer's velocity and power flux increased with a decrease in the flyer's density; when considering the flyer's velocity, power flux, and actual shear effect, titanium was the best material for the flyer. As the thickness of the flyer was decreased, the velocity and power flux of the flyer increased; under the premise of satisfying the forming effect, the thinner flyer was selected. When used as the material for the acceleration chamber, silicon showed a lower flyer velocity and power flux than sapphire, nickel, stainless steel, and other materials. With the increase in the acceleration chamber aperture, the exponentially declining trend in the flyer's velocity increased; when the aperture of the accelerating chamber was consistent with the diameter of the primary explosive, the power flux was the largest. Finally, the ability of the microflyer to initiate the HNS-IV was verified by a steel dent test.
为研究由微型叠氮化铅（Pb(N₃)₂）驱动的微型飞片起爆超细2,2',4,4',6,6'-六硝基芪（HNS-IV）炸药的性能，在Autodyn软件中建立了相应的仿真模型，并用光子多普勒测速仪（PDV）验证了仿真模型的准确性。结合功率通量-作用时间（-）起爆判据研究了各种影响因素。结果表明，飞片速度的指数增长率随叠氮化铅直径和高度的增加而降低，装药直径的影响比装药高度更明显。飞片速度随叠氮化铅密度的增加呈线性增加。飞片速度也随约束材料冲击波阻抗的增加呈线性增加，对应硅和有机玻璃的飞片速度低于金属材料。飞片速度和功率通量随飞片密度的减小而增加；综合考虑飞片速度、功率通量和实际剪切效应，钛是飞片的最佳材料。随着飞片厚度的减小，飞片速度和功率通量增加；在满足成型效果的前提下，选择较薄的飞片。当用作加速腔材料时，硅的飞片速度和功率通量低于蓝宝石、镍、不锈钢等材料。随着加速腔孔径的增加，飞片速度的指数下降趋势增大；当加速腔孔径与起爆药直径一致时，功率通量最大。最后，通过钢凹痕试验验证了微型飞片起爆HNS-IV的能力。
