圆盘型爆磁压缩发生器的数值模拟

根据圆盘型爆磁压缩发生器系统等效电路，建立了简化计算模型。利用Matlab编写了MDEMG程序，以直径240 mm的三单元圆盘型爆磁压缩发生器为研究对象，进行了数值模拟，分析了圆盘型爆磁压缩发生器工作期间电流、电感、爆轰压力、磁压、电压分布等参数的变化过程，并进一步分析发生器初始电流、圆盘构形对发生器输出特性的影响。结果表明:在输入电流为6 MA时，发生器在1.5 nH电感负载上可以获得40 MA、特征上升时间3 s的脉冲电流；发生器输出电流与初始电流正相关，但由于磁压随电流增大迅速增大，发生器输出电流存在极限；相对于平面型圆盘,锥型圆盘可以提高发生器工作后期的功率。

Numerical simulation of disk explosive magnetic generator

Based on the equivalent circuit and simplified model of disk explosive magnetic generator (DEMG), the code MDEMG was compiled with Matlab. To analyze the variation of parameters, such as current, induction, distribution of voltage, detonation pressure and magnetic pressure, and the influences of different initial currents and different shapes of disk on output characteristic of generator, the operation of 240 mm disk explosive magnetic generator was simulated with MDEMG. The results of the simulation include three conclusions as following: this type of generator can output current 40 MA on a 1.5 nH inductive load with a characteristic rise time of 3 s, which corresponds to the experiment results of Russian researcher; Output current increases with the increase of initial current, but output current has a limitation because of the quick increase of magnetic pressure; Conical disk can produce much higher power than that of flat disk. This paper can provide theoretical reference for further domestic study of DEMG.