Analysis of the Force Acting on the Armature in Induction Coil Gun

The operating principle of inductive coil gun is discussed based on the law of electromagnetic induction,and its equivalent circuit model is introduced.Using the McKinney analytic method,the force acting on the armature is analyzed in detail.Then the finite element method simulation is performed.Both the theoretical analysis and the simulation results reveal that the deformation of armature occurs because of non-uniform distributions of axial pressure and radial thrust,and the muzzle velocity of armature is affected seriously by its initial position.In engineering project,the reinforcement of mechanical strength of armature and the appropriate initial position are beneficial to the improvement of the launcher's performance.