电磁轨道炮膛内磁场环境仿真分析  

Simulation Analysis of Railgun In-Bore High Magnetic Field

作　　者：汤铃铃 李豪杰[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《计算机仿真》2014年第11期1-5,46,共6页Computer Simulation

摘　　要：为了考察电磁轨道炮膛内脉冲强磁场对智能弹药电子元器件的影响,分析轨道炮膛内磁场环境,提出建立轨道炮发射过程的磁扩散模型,利用COMSOL Multiphysics软件分析发射过程的速度趋肤效应,得到导轨与电枢上的磁场、电流及洛仑兹力分布。根据导轨与电枢上的电流扩散深度,建立轨道炮面电流分布模型,分析膛内智能弹药电子元器件位置处的磁场空间分布规律与时频特性。磁场最大值达2.71T,主要频率集中在5k Hz以下低频段。轨道炮膛内磁场的高磁通密度、空间衰减迅速特点及低频特性,对轨道炮膛内磁场屏蔽设计具有指导意义。In order to investigate the impact of the electromagnetic railgun＇ s in-bore pulsed high magnetic field on electronic components in intelligent ammunition, the in-bore magnetic field is analyzed. The magnetic diffusion model of railgun launching process is established first. With COMSOL Muhiphysics, the velocity skin effect during railgun launching is evaluated, and the magnetic field, current and Lorentz force distributions on rails and armature are accomplished. Based on the current diffusion depth in rails and armature, a surface current distribution model is built to estimate the spatial distribution and time-frequency characteristics of in-bore magnetic field, especially around the locations of electronic components in intelligent ammunition. The maximum magnetic flux density is 2.71 T and the main frequency is under 5 kHz. Railgun in-bore magnetic field＇ s high flux density, sharply spatial attenuation characteristics and low frequency feature are instructive to railgun in-bore magnetic field shield.

关 键 词：电磁轨道炮 速度趋肤效应 脉冲强磁场 电磁场有限元计算 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]