摘要
在电磁发射系统中,轨道和电枢是脉冲成形网络的负载,负载的电磁参数是影响电磁发射效率的重要原因,其中轨道的电感梯度和电阻梯度是负载的两个重要参数。采用有限元法分析了在频率变化的电流激励下,负载呈现的频率趋肤效应、电感效应等电磁现象,得到轨道的电感梯度和电阻梯度与激励频率的关系,并与经验公式进行比较。计算结果表明:提高激励电流的平稳度可以有效增加电感梯度,减小电阻梯度,合适的轨道尺寸也能有效地提高电感梯度,从而增加电磁发射效率。
In the electromagnetic emission system, the rail and the armature are the load of pulsed forming network, their electromagnetic parameters are the important reasons to affect the efficiency of the electromagnetic emission. In these parameters, the inductance gradient and the resistance gradient are the two important parameters. The finite element method was used to analyze electromagnetic phenomena when the frequency of excitation current was changing, such as skin effect, inductance effects etc. The relationship between the electromagnetic parameters and the excitation frequency were acquired, and the results were compared with the empirical formula. The results showed that improving the smooth degree of excitation current can effectively increase the inductance gradient and reduce the resistance gradient. Selecting appropriate rail size can effectively improve the inductance gradient so as to increase electromagnetic emission efficiency.
出处
《火炮发射与控制学报》
北大核心
2013年第2期5-9,共5页
Journal of Gun Launch & Control
关键词
脉冲成形网络
负载
电感梯度
电阻梯度
有限元法
pulsed forming network
load
inductance gradient
resistance gradient
finite element method （FEM）
