Enhancing the inductance gradient of an electromagnetic railgun (EMRG) directly translates to an improvement in the force on the projectile. Fileting the rails on one side is one of the ways to improve the inductance gradient. This work focuses on the effects of filet arc radius on different parameters of inductance gradient, current density distribution, magnetic flux density, barrel efficiency, breech energy, and critical velocity. The performance of rails with filet arc radius of 2, 4, and 6 mm are compared with the conventional cuboid shape rail geometry. Dynamic field distributions are analyzed by simulating the designed systems in LS-DYNA. A magneto-static analysis is performed using Ansys-Maxwell to determine the magnetic flux density produced behind the armature. It is observed that there is an increase in the flux density and barrel efficiency when filet radius increases. An improvement of 3.81% is observed in the flux density and the barrel efficiency improved from 24% in conventional rails to 27% in rails with a filet radius of 6 mm.

中文翻译：

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电磁轨道炮轨圆角半径影响研究


提高电磁轨道炮（EMRG）的电感梯度可以直接改善弹丸上的力。在一侧锉平导轨是改善电感梯度的方法之一。这项工作重点研究圆角圆弧半径对电感梯度、电流密度分布、磁通密度、枪管效率、后膛能量和临界速度等不同参数的影响。将圆角半径为 2、4 和 6 mm 的钢轨性能与传统长方体钢轨几何形状进行比较。通过在 LS-DYNA 中模拟设计的系统来分析动态场分布。使用 Ansys-Maxwell 进行静磁分析，以确定电枢后面产生的磁通密度。据观察，当圆角半径增加时，磁通密度和筒效率增加。磁通密度提高了 3.81%，桶效率从传统钢轨的 24% 提高到圆角半径为 6 mm 的钢轨的 27%。