增强型电磁驱动装置瞬态磁场分析

 基于ANSYS有限元仿真平台的动网格技术，建立了三维增强型电磁驱动装置有限元模型。结合440 kA发射条件下增强型电磁驱动装置附近的空间磁场分布，验证了模型的可靠性。结合模型开展仿真，获得了增强型电磁驱动装置内膛中轴线上磁场的分布规律，以及电磁驱动装置径向磁场在空间的衰减规律。指出电流峰值时刻，电枢前端的磁感应强度随着距离增大先增大，而后趋于不变。在模型中，可认为电枢前端磁场最大为2.3~3.3 T。

Analysis of transient magnetic field of augmented electromagnetic driving device

Based on the dynamic grid technology of ANSYS finite element simulation platform, a three-dimensional finite element model of augmented electromagnetic driving device is established. The model's reliability is verified using the spatial magnetic field distribution near the augmented electromagnetic driving device under the 440 kA launch condition. Simulation study with the model is performed and the distribution law of the magnetic field on the central axis of the inner bore of the augmented electromagnetic driving device and the attenuation law of the radial magnetic field of the electromagnetic driving device in space are obtained. It is shown that at the peak of the current, the magnetic induction intensity at the front end of armature first increases and then tends to remain unchanged with the increase of the distance. In the model it is assumed that the maximum magnetic field at the front end of the armature is between 2.3~3.3 T.