线圈发射过程弹丸参数设置

Parameter Settings of the Projectile in EML

基于Ansoft电磁场有限元分析软件,对线圈发射过程进行了动态仿真,分析了弹丸材料与形状、与驱动线圈相对位置等影响弹丸受力的因素。仿真结果表明:弹丸长度应尽量与激励线圈长度接近;弹丸采用管状结构并且外侧靠近驱动线圈内侧可充分利用驱动线圈产生磁场的能量梯度;弹丸应采用导磁非导电材料,或者改变弹丸结构以抑制其内部产生感应涡流。基于以上分析得出了弹丸的最佳受力位置,并以此求出弹丸最大出炮口速度。

Based on electromagnetic field analysis software-Ansoft, the process of the coil electromagnetic launch （EML） was simulated. The material and shape of the projectile, and other factors were analyzed （e. g. the relative position of the projectile and drive coil）. The conclusions are as follows： the length of the projectile and the length of the exciting coil should be as close as possible; using the tubular structure and the outer surface of the projectile fully close to the inner surface of the drive coil make the projectile take full advantage of the magnetic energy gradient generated by the exciting coil; the material of the projectile should be with high permeability and non-conductive, or changing the structure of the projectile to inhibit the generation of the induced eddy current inside it. Based on the above analysis, the best position of the projectile and the maximum muzzle velocity of the projectile were obtained