感应线圈炮性能的场路结合分析  

Analysis of Inductive Coil Gun Performance Based on Field Coupling Circuit Method

作　　者：刘守豹[1] 阮江军[1] 杜志叶[1] 黄道春[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《电工技术学报》2010年第12期1-7,共7页Transactions of China Electrotechnical Society

摘　　要：线圈炮性能分析对于线圈炮的实验研究和电磁结构优化非常重要。本文使用电流丝模型对线圈炮进行路仿真,电流丝模型将线圈炮控制方程归结为非线性变系数常微分方程组的初值问题,路模型易于编程实现,从中可发现系统性能对可变参数的依赖关系。使用组合网格法建立线圈炮场模型,组合网格法使用两套相互独立的网格对场域进行离散,克服了常规有限元法在处理运动电磁问题上需要重剖分的麻烦。文中使用路模型和场模型相结合的方法对三级同轴感应线圈炮进行了仿真,实现了对线圈炮这类复杂的运动导体涡流场的三维场分析,获得了线圈炮发射过程中空间磁场分布和电枢涡流分布。通过对比两种模型的仿真结果,证实了它们的一致性和有效性。Performance analysis of inductive coil gun is very important for its experimental research and electromagnetic optimization design.Circuit simulation is carried out based on current filament model（CFM）,and the governing equations of CFM may be boiled down to initial value problem of non-linear variable coefficient ordinary differential equations,which can be solved by numerical method and is easy to program.From circuit simulation,the dependence of system performance on variable parameters can be found.Field model is built based on composite grid method（CGM）;CGM uses two sets of mutual independent grids to discrete solution regions;it overcomes the trouble of remeshing in normal finite element method（FEM）,which is built based on one set of grid.In this paper performance analysis of three stages coaxial inductive coil gun is carried out based on field coupling circuit method.Three dimensional moving conductor eddy current（MCEC） simulation of coil gun is realized,and field variables distribution in the launching process is obtained.By comparing the results of circuit model and field model the validity of the two models are proved.

关 键 词：线圈炮 电流丝模型 组合网格法 有限元法 运动导体涡流场 

分 类 号：O175.1[理学—数学]