摘要
针对电枢与导轨(简称枢轨)实际接触条件下电磁轨道炮膛内磁场研究缺乏的问题,从小口径C型电枢轨道炮出发,根据静止状态下枢轨实际接触产生的电枢电流密度分布,利用数值计算和有限元仿真对电枢前端中轴线上各考察点磁通密度进行分析,结果与试验值基本吻合。在此基础上,利用模化方法,对电枢运动条件下轨道炮膛内磁场分布特性进行了分析,结果表明:在满足一定相似关系的基础上,可以实现不同口径轨道炮电枢速度和膛内磁场的近似模化;各考察点峰值磁通密度随着与电枢距离的增加而迅速衰减,距离电枢曲率圆心2倍口径考察点的磁通密度仅为1倍口径点的27. 4%左右;研究结果有助于智能弹药的电磁屏蔽设计。
The distribution characteristics of railgun in-bore magnetic field under the realistic armaturerail contact status is studied.For a small caliber C-shaped armature railgun,the numerical calculation and finite element simulation are used to analyze the magnetic flux density of the investigated points along the central axes of armature front endbased on the armature current density distribution produced by the actual contact of armature-rail under static state.The analyzed results are in good agreement with the experimental values.On this basis,the distribution characteristics of in-bore magnetic field under motion state are analyzed by using the scaling method.The results show that the approximate scaling of armature velocities and magnetic fields of different caliber railguns can be realized on the basis of satisfying certain scaling relations.The peak magnetic flux density of each investigated point decreases rapidly with the increase in the distance from point to armature,and the magnetic flux density of the investigated point at the distance of two calibers from the armature curvature center is about 27.4%of that of the point at the one caliber distance.The results are helpful to the electromagnetic shielding design of intelligent ammunition.
作者
殷强
张合
李豪杰
杨宇鑫
YIN Qiang;ZHANG He;LI Haojie;YANG Yuxin(Ministerial Key Laboratory of ZNDY,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2019年第3期464-472,共9页
Acta Armamentarii
基金
军委科技委基础加强计划重点基础研究项目(2017-JCJQ-ZD-004)
关键词
电磁轨道炮
枢轨接触
磁通密度
模化方法
electromagnetic railgun
armature-rail contact
magnetic flux density
scaling method
