电磁轨道炮电枢装填推力影响因素分析  

The Factor Analysis of Thrust Impact During Filling Armature in Electromagnetic Railgun

作　　者：李明涛[1] 曹斌[1] 葛霞[1] 裴朋超 国伟[1] LI Mingtao;CAO Bin;GE Xia;PEI Pengchao;GUO Wei(Northwest Institute of Mechanical&Electrical Engineering,Xianyang 712099,Shaanxi,China)

机构地区：[1]西北机电工程研究所

出　　处：《火炮发射与控制学报》2020年第1期55-60,共6页Journal of Gun Launch & Control

摘　　要：电磁轨道炮发射时装填固体电枢所需的推力不仅与电枢-轨道之间的初始接触压力相关,而且与装填电枢的方式等因素相关。通过选取装填过程所涉及的推杆和电枢为研究对象,利用NX NASTRAN解算器建立了电枢入膛有限元模型,对几种常见的推杆偏移现象进行了量化对比分析,结果表明推杆的上下偏移是造成装填推力变大的重要因素。在实际建模中,轨道选用与现实更贴合的凸面对称结构、电枢-轨道接触压力按照"每安培一克"进行初设。这些工作将有助于提高电磁轨道炮自动装填装置的设计水平。Before launching an EM railgun, the thrust force required for solid armature loading is related not only to the initial contact pressure between armature and rails, but also to other factors such as the method of armature loading. By selecting the thrust rod and armature involved in the filling process as the research objects, the finite element model of armature filling was established by the NX NASTRAN solver, with the thrust variation of several common thrust rods quantitatively analyzed when they were offset. The results show that the thrust increases most when the push rod moves up and down. In practical modeling, the convex symmetrical structure has been selected for the rail, for it fits the actual situation more closely, with the armature-rails contact pressure initially set according to ‘one gram per ampere’. This work will be helpful to improve the design of the automatic loading device of the EM railgun.

关 键 词：电磁轨道炮 固体电枢 装填推力 推杆 有限元模型 

分 类 号：TJ303[兵器科学与技术—火炮、自动武器与弹药工程]