中文摘要：

通过计算电枢移动过程中电枢附近的磁场分布以及通过电枢的电流密度分布,可以得到电枢上各点的洛仑兹力,积分后可得整个电枢受到的推力。同时考虑电流通过电枢时的电磁热效应产生的膨胀量及导轨与电枢间的摩擦,可以得到电枢在导轨内运动过程中的受力、速度变化。在此基础上利用Ansys软件建立发射状态时的三维计算模型,结合之前理论分析来定义边界条件、接触条件以及电枢推力曲线。通过具体算例,分析导轨与电枢间接触应力分布随电枢移动的变化,讨论相关物理量与材料性质、接触条件等的关系,从而为电磁轨道发射装置的强度设计提供依据。

英文摘要：

Through calculating the magnetic field near the armature and the current density distribution in armature during the armature movement,the Lorentz force at every point of the armature can be obtained.Therefore,the thrust acted on the armature is got by integral.At the same time,considering the net expansion due to the electromagnetic heat effect of the armature when current discharging from the armature,and the friction between the rail and the armature,the force and the speed of the armature can be obtained when the armature moves in the guide rail.Based on the known results,the three-dimensional computational model is built using the Ansys software,and the boundary condition,contact condition,curve of thrust are be defined,it is analysed that analyses the change of contact stresses between armature and rail during armature move,and discussed the relation between these physical quantities regarding material properties and the contact condition by using a numerical example.