To solve the problem of separation of armature and rail at the tail of a quadrupole armature arm at the initial contact, the causes of separation are analyzed based on simplifying the armature arm into a cantilever beam. At the same time, to obtain the contour curve of the armature arm, a reverse loading method is proposed, and the rationality of this method is verified. In view of the shortcomings of the reverse loading method, an improved method of using finite element simulation to predict the deflection of the armature arm is proposed. The results show that the curve of the armature arm obtained by the improved reverse loading method is, at initial contact, without contact separation at the tail. The contact area and contact efficiency of the armature arm are significantly improved, and the pressure distribution on the contact surface is more uniform, which provides an effective contact state for pulse current.

中文翻译：

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基于反向加载法的四极电枢臂优化设计


针对四极衔铁臂尾部初次接触时衔铁与轨道分离的问题，将衔铁臂简化为悬臂梁，分析了分离原因。同时，为了获得电枢臂的轮廓曲线，提出了反向加载方法，并验证了该方法的合理性。针对反向加载法的缺点，提出了一种利用有限元仿真预测电枢臂挠度的改进方法。结果表明，采用改进的反向加载方法得到的电枢臂曲线在初始接触时，尾部无接触分离。衔铁臂的接触面积和接触效率显着提高，接触面上的压力分布更加均匀，为脉冲电流提供了有效的接触状态。