电磁发射弹丸内膛磁场分布特性的影响因素分析  

Analysis of effects on in-bore magnetic field distribution characteristics of electromagnetic launcher projectile

作　　者：李湘平[1] 李玉[1] 武晓康 

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033

出　　处：《海军工程大学学报》2016年第B06期79-84,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51207162;51407191;51307176);国家973计划资助项目(6132620102);国家重点基金资助项目(9140C840409140C84026)

摘　　要：针对电磁轨道发射装置内膛的强磁场环境进行了分析,并通过建立有限元仿真模型,对影响弹丸中轴线的磁场分布特性的影响因素进行了仿真分析。结果表明:弹体的弹壳厚度越大,弹体上产生的涡流越强,导致中轴线上磁感应强度越小;在输入电流的平流段,随着时间的推移,电流逐渐趋于均匀分布,趋肤深度越大,磁感应强度越大;上升段输入电流频率ω越大,磁感应强度越大;内膛磁感应强度随弹丸长度方向迅速衰减,600mm处的磁场基本降为0。Aimed at the high in-bore magnetic induction intensity generated by electromagnetic launcher, an analysis of magnetic field distribution effects on projectile central axis is made by build- ing a finite element model （FEM）. Simulation results show that the thicker the projectilets shell, the stronger the eddy current and the weaker the magnetic induction intensity in projectile central axis will be caused; During the phase of constant current, the current tends to evenly distribute with the time going, leading to greater current skin depth and stronger magnetic induction intensity; The greater the rising current frequency, the stronger of magnetic induction intensity; The in-bore magnetic in- duction intensity gets weaker with the increase of the projectile＇s length and approximates to 0 at 600 mm. The research can provide useful re-ferenee to the layout of components in guided projectile.

关 键 词：电磁发射弹丸 内膛磁场分析 涡流分析 电流趋肤效应 有限元仿真 

分 类 号：TM33[电气工程—电机]