重接式电磁发射的线圈与发射体仿真计算

重接式电磁发射是一种利用磁力线重接来推动发射体的电磁发射形式,具有发射体与线圈无接触、无烧蚀等优点.利用ANSOFT电磁场有限元分析软件建立了重接式电磁发射的三维仿真模型,对线圈磁场、发射体涡流和发射体受力进行仿真计算,并分析讨论线圈和发射体形状变化对发射效果的影响.仿真表明,发射体受力最大值主要取决于发射体在运动方向的受力作用面积,面积越大,受力越大;直线后沿的发射体受力要优于弧线后沿.

Simulation of coil and projectile in reconnection electromagnetic launch

The reconnection electromagnetic launch is a form of electromagnetic launch that utilizes the magnetic field line reconnection to accelerate a projectile.It has the advantages that there is no contact between the projectile and the coil and no erosion.A three-dimensional simulation model of the reconnection electromagnetic launch is established by means of the ANSOFT software for electromagnetic field finite element analysis.Simulative computations of the coil magnetic field,the projectile eddy current and the electromagnetic force applied to the projectile are performed.The influences of the coil and the projectile shapes on the launch effect are also analyzed.The simulations show that the existence of the projectile eddy current changes the distribution and the magnitude of the initial magnetic field of the coil.The maximal electromagnetic force on the projectile mainly depends on the force action area on the projectile in the motion direction.The larger the area is,the stronger the force is.The projectile with the linear rear edge is better in the electromagnetic force than that with the circular rear edge.