The temperature field analysis of electromagnetic rail launcher is an important basis for studying the launching stability and life.Aiming at the rail groove erosion phenomenon,the launching initial segment is selected as the research site.The heat generation mechanism of Joule heat and friction heat is analyzed,the heat source model is established,the three-dimensional finite element simulation model is established and the position,velocity and current waveform of the launching initial section are determined according to the circuit simulation,the finite element simulation results show that the heat in the initial stage of launching mainly concentrates on the contact surface between armature and rail.The friction heat is the main factor affecting the temperature rise of the contact surface,and the uneven distribution of the current density will lead to the uneven temperature distribution of the contact surface.
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