中文摘要：

针对电磁发射过程中电枢磨损过快容易导致转捩的问题，研究了枢轨接触面之间的最佳法向载荷。通过在合理范围内调整电枢的尾翼倾角，使枢轨接触面在工况下产生不同的接触力。经算例分析表明：当接触力值接近且稍大于最佳法向载荷时，枢轨之间可以保证良好接触且电枢磨损量较小，此时为最理想的尾翼倾角取值。该分析方法为电枢结构的优化设计提供了有效的技术途径。

英文摘要：

In order to solve the problem that the armature wears so fast as to cause transition in the e- lectromagnetic launch process, the optimal normal load on the interface between armature and rail is studied. By adjusting the angle of the trailing arm, the optimal load on the interface between armature and rail is obtained. Namely, the load ensures excellent contact between armature and rail, and at the same time the wear mass loss of the trailing arm is reduced. Thus the probability of the transition will be decreased and the life of the launcher will be prolonged. The method provides an effective technical way for the optimization design of the structure of the armature.