爆炸箔起爆器参数对电爆性能的影响

Influence on Foil Initiator Parameters of Electric Explosion Performance

针对爆炸箔起爆系统的能量利用率问题,对爆炸箔起爆器中脉冲电源的电容量、起爆回路的等效电感和起爆回路电阻等参数进行了研究;采用尺寸为250μm×250μm×3μm的A1薄膜材料,且爆炸箔使用方形桥区结构,并通过Simulink仿真软件对脉冲电源的电容量、起爆回路的等效电感和起爆回路电阻分别使用不同数值进行了计算;其中利用基尔霍夫回路方程和改进的Fireset模型,分析了爆炸箔电爆参数中对应的爆发电压、爆发电流和爆发时间等影响因子,经过实验得出电容量对电爆性能有较大影响,而电感和电阻对电爆炸性能影响有限;当电容量为100 nF、200 nF和300 nF时,最大功率为100 nF对应的37.3 kW;电感为200 nH、260 nH和320 nH时,最大功率为200 nH对应的15.2 kW;电阻为0.12Ω、0.24Ω和0.36Ω时,最大功率为0.12Ω对应的14.4 kW;电爆炸过程中电容量、电感和电阻相对应的功率幅值变动分别为59.5%、26.3%和20.8%,因此在实际应用中脉冲电源的电容量、回路等效电感和起爆回路电阻参数越小,则电爆炸过程中能量利用率越高,电爆性能越好。

Aiming at the problem of energy utilization rate in explosive foil initiation system,the capacitance of pulse power supply,equivalent inductance and resistance of initiation circuit in explosive foil initiator are studied.A1 thin film material with a size of 250μm by 250μm by 3μm is used,and the explosive foil has a square bridge structure.The capacitance of the pulse power supply,the equivalent inductance and resistance of the initiation circuit are calculated numerically by Simulink simulation software.Among them,by using the Kirchhoff circuit equation and improved Fireset model,the influence factors,such as explosion voltage,explosion current and explosion time,are analyzed.Through experiments,it is concluded that the capacitance has a great influence on the electric explosion performance,while the inductance and resistance have no influence.The maximum power is 37.3 kW for 100 nF when the capacitance is 100 nF,200 nF and 300 nF respectively,and it is 15.2 kW for 200 nH when the inductance is 200 nH,260 nH and 320 nH respectively,and it is 14.4 kW for 0.12Ω when the resistance is 0.12Ω,0.24Ω and 0.36Ω respectively.The power amplitude changes of capacitance,inductance and resistance are 59.5%,26.3% and 20.8%,respectively.Therefore,in practical application,the capacitance,loop equivalent inductance and initiation loop resistance parameters of pulse power supply are smaller,the energy utilization rate and electrical explosion performance are higher and better separately.