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CO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.