Some Key Parameters for Rectangular Caliber Railgun System

摘要

Electromagnetic railgun is one of the most important new concept weapons. Some key parameters of a rectangular caliber railgun system—the thickness of the armature $d_{0}$ , the width of the caliber $X$, the height of the caliber $Y$, the minimum length of the rail $L$, the amplitude of current $I$, and the pulsewidth of current $t_{0}$—are studied in this paper. By introducing the current carrier margin coefficient named $alpha$ , the ratio of armature thickness to railgun caliber width named $beta$ , and the ratio of caliber height to caliber width named $gamma$ , equations of some key parameters of the rectangular caliber railgun system are proposed. Based on analysis of the armature's electric heating capacity and mass, 0.7 is an appropriate value for $alpha$. Based on analysis of parameters of railguns, $beta = 1/3$ and $gamma leq 1$ are appropriate for small and medium calibers, and $beta < 1/3$ and $gamma = 1$ are appropriate for large calibers.