Research on Electrical Contact Characteristics of Interference Fit Armature Based on Simulation

The electrical contact characteristics between the armature and the rail directly affect the current distribution on the armature and the rail during the launch process, which in turn affects key characteristics such as the thrust of the launcher and the distribution of Joule heat. In this paper, based on the Cooper-Mikic-Yovanovich contact theory, the electrical contact characteristics of the quadrupole electromagnetic orbit launcher under the interference fit condition are simulated, and the simulation results closer to the real current distribution are obtained. Based on the results, the electromagnetic characteristics of the launcher are analyzed. An analysis is carried out and it is pointed out that compared with ideal contact conditions, factors such as contact surface roughness will affect the electrical contact efficiency, which in turn affects the electromagnetic thrust and Joule heating of the launcher. (paper)