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为详细考察真实脉冲电源加载下,影响电磁发射装置性能各个因素的演化规律,对矩形截面铜导轨和C型铝电枢组成的电磁发射装置进行三维有限元模拟,得到发射装置在电容电源驱动下回路电流、电磁驱动力与电枢最大电流密度随时间的变化曲线,详细讨论该类型发射装置导轨和电枢几何参数变化对电流峰值、最大洛伦兹力、电枢最大电流密度及位置的影响规律。结果表明,减小导轨宽度和厚度能明显提高电枢驱动力,接触长度和头部倒角对驱动力和最大电流密度影响不明显。
In order to investigate in detail the evolution of the factors affecting the performance of the electromagnetic launcher under the real pulsed power supply, the three-dimensional finite element simulation of the electromagnetic launcher composed of the rectangular cross-section copper rail and the C-shaped aluminum armature is performed, and the launcher is driven by the capacitor power Loop current, electromagnetic driving force and maximum current density of armature over time, the effects of the variation of the geometrical parameters of the guide rail and the armature on the peak current, the maximum Lorentz force, the maximum current density and the position of the armature are discussed in detail law. The results show that reducing the width and thickness of the guide rail can significantly improve the armature driving force, the contact length and the chamfer of the head have no obvious effect on the driving force and the maximum current density.