基于Ansoft-Maxwell有限元分析软件,建立了磁阻型螺旋线圈电磁发射装置的3D仿真模型,分析了此种发射装置的三维应力场问题,在导轨材料、求解器、求解精度等保持不变的情况下,通过单独改变某一参数,得到了电枢与驱动线圈的相对位置、电流大小、电枢尺寸、驱动线圈尺寸等参数与其驱动线圈所受应力之间的关系.分析结果表明,弹丸与线圈存在一个最佳位置,在这一位置驱动线圈所受的应力最小；驱动线圈应力与电流的平方成正比；最大应力随着电枢长度的增加先是逐渐减小,然后逐渐增大,存在一个最佳电枢长度使应力最小；同质量铁磁质弹丸,弹丸长径比约为1时,驱动线圈应力达到最小值.最大应力随线圈长度(通电线圈匝数)增加而减小,但减速逐渐变缓；最大应力随线圈内径的增加逐渐增加.%Based on Ansoft-Maxwell finite-element software, this paper investigated 3D stress filed issue of reluctance helical electromagnetic launchers. The influencing factors of stress on driving coil in helical coil e-lectromagnetic launchers (HCEL's) were analyzed numerically, such as the relative position of the armature and stator, current magnitude, armature and stator size. The results show that, the stress is related to the position of the armature, and the least stress position exists. The maximum stress of driving coil is proportional to the squre of the current. The stress is related to axial length and radius of the armature, and the least stress parameter exists. And there also related to axial length and radius of the driving coil.
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