导弹四级磁场电枢轨道过盈配合参数优化

为了促进四级电磁轨道发射器在地空导弹武器发射中的应用，对四级电枢的过盈结构进行了研究。在有限元软件Ansys Workbench三维过盈装配仿真的基础上，选择最大等效应力、接触面积系数、接触压强均匀系数和相对接触压强系数四个表征接触特性的评价指标，采用正交试验的方法对四级电枢的过盈量、尾翼宽度、尾翼厚度和过盈长度4个过盈结构参数进行了综合优化。结果表明，采用过盈量2 mm、尾翼宽度140 mm、尾翼厚度40 mm、过盈长度270 mm的优水平组合能够使发射前期电枢和轨道间接触特性更理想，可为四级电枢结构设计提供参考。

Optimization of interference fit between armature and rail in missile's quadrupole electromagnetic field

To promote the application of quadrupole electromagnetic orbital launcher in ground-to-air missile launching, the interference structure of quadrupole armature was studied. On the basis of finite element software ANSYS Workbench and its 3D interference fit simulation, with four evaluation indexes-maximum equivalent stress, coefficient of contact area, uniformity coefficient of contact pressure and coefficient of relative contact pressure-selected to describe the contact characteristics, the four interference structure parameters of quadrupole armature (interference amount and length, tail width and thickness) were optimized comprehensively by orthogonal experiment. The results show that the optimal combination of 2 mm interference amount, 140 mm tail width, 40 mm tail thickness and 270 mm interference length can make the contact characteristics between armature and rail ideal in the early stage of launch, which can be used as a reference for the design of quadrupole armature structure.