A Calculation Method of Deposition Based on Armature Melting

This article proposes a method for calculating the distribution of the deposition layer on the rail surface based on the simulation of armature melting. A series of 49 launch experiments were conducted to study the distribution of the deposition. The thickness of the deposition, as obtained from both simulations and experimental measurements, shows strong agreement, confirming the accuracy and reliability of the proposed calculation method. Both the simulation and experimental findings reveal that the deposition is thicker during the initial stages of the launch and gradually becomes thinner as the armature reaches the high-speed stage. The trend aligns with conventional theoretical expectations. Further comparative analysis between the deposition thickness and the current waveform identifies a significant time lag: the maximum deposition layer thickness occurs after the peak of the current waveform. During the high-speed stage, despite the relatively high current amplitude, the deposition thickness decreases rapidly and ultimately disappears. This behavior is attributed to the cessation of armature melting, which halts the further deposition of material onto the rail surface.