Simulation Study on Critical Velocity of Electromagnetic Rail Launcher

Abstract

Aiming at the problems existing in the study of the dynamic response of electromagnetic rail launcher, this paper derived the analytical solution for studying the dynamic response of electromagnetic rail launcher and established the finite element models based on simplified electromagnetic rail launcher. In addition, the dynamic response model under sequential discharge conditions was established and this model was verified through the analytical solution of critical velocity, analytical solution of dynamic response and finite element beam model. The results show that the numerical solution of the two-dimensional beam model is in good agreement with the analytical solution. The calculation error of the critical velocity calculated by the three-dimensional finite element calculation model does not exceed 1.2%. The analytical model and the three-dimensional finite element calculation model have a good consistency in the vibration period, and the rail deformation amplitude has a certain difference and the difference of rail deformation amplitude is the largest in the armature action area. The rail deformation amplitude is positively correlated with the current, and the critical velocity causes the rail deformation to increase significantly.