电磁发射复合型结构拦截弹的3维电磁场有限元建模与仿真
Finite element analysis on 3-D electromagnetic field of electromagnetic launching composite intercepting projectile
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摘要: 为了达到拦截弹的连续发射、提高拦截效果和加固驱动线圈的目的，提出了一种复合型结构的拦截弹。在建立数学模型时，基于麦克斯韦方程组，对非铁磁材料区域、铁磁材料区域、空间区域等求解区采用矢量磁位和标量磁位来描述3维电磁场，并采用Ansoft有限元分析软件中的MAXWELL3D模块对新型结构拦截弹的电磁场和涡流场分布情况进行了仿真研究。通过对仿真结果的分析发现，使用了铁磁材料的拦截弹具有其它类型电磁发射弹丸所不具备的磁场分布特点：感应层与驱动线圈之间为斥力，屏蔽层与驱动线圈之间为吸力。这使得实现了一体化设计的拦截弹不仅可以满足连续发射的需要，而且还提高了拦截效果，同时对驱动线圈起到了加固作用。Abstract: This paper presents a composite intercepting projectile, which is designed for continuous firing, enhancing intercepting effect and reinforcing driving coil. The 3-D electromagnetic fields in the non-ferromagnet area, ferromagnet area and air area are described by magnetic vector potential and magnetic scalar potential based on Maxwell’s equation. The electromagnetic field distribution in the intercepting projectile is then simulated by the MAXWELL3D module of finite element analysis software Ansoft. The simulation results show that, the field distribution of the intercepting projectile with ferromagnet possesses some special characteristics: there exists a repulsion force between induction layer and driving coil, and there exists an attraction force between shielding layer and driving c
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