电磁冲击加载平板线圈的有限元分析

电磁冲击加载中,成形线圈是电能转化为磁场能的载体,使毛坯产生塑性变形的关键部件。介绍了平板线圈电磁驱动基本原理,通过ANSYS多物理场模拟平板线圈的简化模型,系统研究了线圈几何参数对轴向电磁力的影响;探讨了线圈驱动下驱动片上所受轴向电磁力分布规律及线圈参数对成形设备能量利用率的影响。仿真结果显示:随线圈匝数增加电磁力呈指数增加,随匝间距的增加呈指数减少,随起点距呈近似指数减小;轴向电磁力在线圈距中心轴2/3区域达到最大值;减小电感值有利于提高成形效率。

Finite Element Analysis of Panel Coil Loaded with Electromagnetic Impact

During the loading of electromagnetic impact,a panel coil is not only a carrier for electric energy to be transformed into magnetic energy but also a key unit makes a blank plastically deformed.This paper introduces the basic principle of electromagnetic drive of the panel coil simulates the influence of its geometric parameters on axial electromagnetic force,probes into the distribution of the electromagnetic force on the drive and the impact of the panel coil on the efficiency of the equipment power use.The result demonstrates that with the increase of turns,the axial electromagnetic force increases exponentially;with the increase of the distance between turns,the axial electromagnetic force decreases exponentially and with the increase of inner radius,diminishes almost exponentially.The strongest electromagnetic force is at the region 2/3 away from the symmetrical axis;the decrease of inductance value helps improve forming efficiency.