摘要
飞片速度是冲击片雷管能否可靠起爆的一个关键因素,为了深入研究加速膛参数对飞片速度的影响,分别通过实验和数值模拟方法对飞片速度的影响因素进行分析。采用磁控溅射技术设计制备了一种膜层厚度为0.5/0.5/2μm,尺寸为0.15 mm×0.15 mm的TiW/Ni/Au复合薄膜爆炸箔。在激励条件为0.1μF、1200 V下,选用密度为1.45 g·cm^(-3),厚度为25μm的聚酰亚胺飞片,利用光子多普勒速度测试技术测量了不同加速膛参数的飞片速度。研究结果显示:在相同孔径条件下,当加速膛厚度分别为0.3,0.4,0.5,0.6 mm时,随着加速膛厚度的增加,飞片速度先增后减,在厚度为0.4 mm时达到最高值;在相同厚度条件下,当加速膛孔径分别为0.15,0.23,0.3,0.35,0.45 mm时,飞片速度随孔径增加而降低,其中孔径为0.15 mm时速度最高;此外,在相同孔径和厚度下,飞片经过聚酰亚胺和陶瓷两种材质的加速膛测试得到的速度变化趋势和数值相近,而聚酰亚胺具有较高的强度和韧性,成本更低,因此可替代陶瓷作为加速膛材料。同时采用数值模拟方法重新拟合了适用于TiW/Ni/Au复合薄膜的飞片速度经验公式,验证结果表明,计算结果与实验数据的偏差均在2.5%以内。
The velocity of the flyer is a key factor in determining the reliability of initiating exploding detonators.In order to investigate the influence of barrel parameters on the flyer velocity,the factors affecting the flyer velocity were analyzed through both experimental and numerical simulation methods.A TiW/Ni/Au composite film exploding foil with a film thickness of 0.5/0.5/2μm and dimensions of 0.15 mm×0.15 mm was designed and prepared using magnetron sputtering technology.Under excitation conditions of 0.1μF and 1200 V,a polyimide flyer with a density of 1.45 g·cm^(-3) and a thickness of 25μm was selected,and the flyer velocities with different barrel parameters were measured using photon Doppler velocity testing technology.The research results indicate that,under the same diameter conditions,the flyer velocity initially increases and then decreases with increasing barrel thickness,reaching a peak at 0.4 mm.When the barrel diameter are 0.15,0.23,0.3,0.35,0.45 mm,the flyer velocity decreases as the diameter increases,with the highest velocity observed at a diameter of 0.15 mm.Furthermore,under the same thickness and diameter conditions,the velocities obtained from polyimide and ceramic barrel tests exhibit similar trends and values,with polyimide demonstrating higher strength and toughness and lower cost,making it a viable alternative to ceramic as a barrel material.Furthermore,a numerical simulation method was used to re-fit the empirical formula for flyer velocity applicable to the TiW/Ni/Au composite thin film,and the verification results show that the deviation between the calculated results and experimental data is within 2.5%.
作者
王蔚
董晓芬
王端
李乾
李思宇
郭宇轩
WANG Wei;DONG Xiao-fen;WANG Duan;LI Qian;LI Si-yu;GUO Yu-xuan(School of Environmental and Safety Engineering,North University of China,Taiyuan 030051,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2024年第7期737-744,共8页
Chinese Journal of Energetic Materials
