爆炸箔起爆器参数对电爆性能的影响

Influence of Parameters of Foil Initiator on Electric Explosion Performance

摘要:

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100nF、200nF和300nF时，最大功率为100nF对应的37.3KW；电感为200nH、260nH和320nH时，最大功率为200nH对应的15.2KW；电阻为0.12Ω、0.24Ω和0.36Ω时，最大功率为0.12Ω对应的14.4KW；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。

Abstract:

Aiming at the problem of energy utilization rate of explosive foil initiation system, the capacitance of pulse power supply, equivalent inductance of initiation circuit and resistance of initiation circuit in explosive foil initiator are studied. A1 thin film material with a size of 250μm×250μm×3μm is used, and the explosive foil has a square bridge structure. The capacitance of the pulse power supply, the equivalent inductance of the initiation circuit and the resistance of the initiation circuit are calculated with different values by Simulink simulation software. Among them, using Kirchhoff circuit equation and improved Fireset model, the corresponding influencing 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 a limited influence on the electric explosion performance. The maximum power is 37.3KW for 100nF when the capacitance is 100nF, 200nF and 300nF, and 15.2KW for 200nH when the inductance is 200nH, 260nH and 320nH, and 14.4KW for 0.12Ω when the resistance is 0.12Ω, 0.24Ω and 0.36Ω. The power amplitude changes of capacitance, inductance and resistance are 59.5%, 26.3% and 20.8%, respectively. Therefore, in practical application, the smaller the capacitance, loop equivalent inductance and initiation loop resistance parameters of pulse power supply, the higher the energy utilization rate and the better the electrical explosion performance.