铁电体电源起爆金属桥箔的数值计算分析

Numerical Calculation of Ferroelectric Power Supply Initiating Metal Bridge Foil

为探讨铁电体电源对金属桥箔的起爆作用,对冲击波作用下PZT95/5铁电体对铜桥箔的放电过程进行了数值计算。通过引入金属桥箔电阻非线性变化的FIRESET模型,考虑回路电感及回路电阻,计算了负载为铜桥箔时的铁电体的电响应。讨论了铁电体并联数量、回路电感对桥箔爆炸特性的影响。计算结果表明:当并联排列的铁电体电极面积达到0.006 m2以上时,在桥箔上可产生高于100 GA/m2的电流密度,能够有效起爆桥箔。而回路中存在适当的电感将有利于铁电体电源起爆桥箔。计算方法和结果能够为起爆金属桥箔的铁电体电源设计提供理论根据。

To investigate the effect of ferroelectric power supply initiating metal bridge foil,the electrical responses of the shock-loaded PZT95/5 ferroelectric with copper bridge foil load were numerically calculated. The non-linear resistance model was used for the metal bridge foil. The voltage, current, and resistance of metal bridge foil under different number of ferroelectric blocks arranged in parallel were calculated. By the results of calculated voltages and resistances of copper bridge foil, the number of parallel ferroelectric blocks to make copper bridge exploding was obtained. The calculation and resuits provide a theoretical basis to design the ferroelectric power supply initiating metal bridge foil.