摘要
轨道是电磁轨道炮的重要部件,其性能优劣直接影响轨道炮的发射性能。在传统矩形截面轨道的基础上,设计了凸形和凹形两种不同截面形状的轨道,求解了等高等面积条件下每一种截面的惯性矩,得到了截面参数的最优解。对于每种不同的形状,利用有限元软件MAXWELL对轨道表面电流密度分布进行了三维数值仿真。通过对不同形状轨道的机械和电流特性的对比分析得出:凸形截面轨道具有最大的惯性矩,可以提高电枢的临界速度;而且轨道表面电流密度分布最均匀,枢轨间电接触性能和电流密度分布最好,能很好地抑制烧蚀和电枢局部熔化,因此更适合用于电磁轨道发射。
As an important component of railgun,rail affects directly the launch performance of railgun. Based on traditional rectangle cross section rail,another two sections with shape of convexity and concave are designed to study the inertia moment,and the optimum solutions under the conditions of both same rail height and section area are solved. Based on optimum parameters,three simulation models are established,and the current density distributions on rail surfaces are obtained by using finite element software. Comparing to the other two rails,the inertia moment of rail with convexity section is the largest and current distribution on rail surface is the most symmetrical. It means rail with convexity section can furthest improve the armature critical velocity and protect rail from erosion. Thus,the rail with convexity cross section is more suitable for electromagnetic railgun.
出处
《火力与指挥控制》
CSCD
北大核心
2014年第4期45-48,53,共5页
Fire Control & Command Control
基金
军队预研基金资助项目
关键词
电磁轨道炮
轨道
截面
惯性矩
电流密度分布
electromagnetic railgun
rail
cross section
inertia moment
current density distribution
