摘要
用有限差分法对漏泄同轴电缆的电容进行了计算。文中首先从 L aplace方程出发导出了漏缆横截面内电位的差分方程 ,给出了径向各分界面处的边界条件并进行了离散化 ,得到了电容和特性阻抗的计算式。然后对该方法的计算精度以及人为设置的外边界对计算结果的影响进行了讨论 ,给出了电容收敛曲线。
The capacitance of Leaky Coaxial Cable (LCX) is calculated by Finite Difference Method in this paper. The difference equation of electrical potential in the cross section of the LCX is derived from Laplace equation. The boundary conditions between interfaces in the radius direction and their discrete forms are given. The expressions for capacitance and characteristic impedance are then obtained. Then, the accuracy of this method and the influence of the outer boundary on the results are discussed. The convergent curve of the capacitance is given. Finally, the influence of slot angle on the capacitance and the characteristic impedance of the LCX is analyzed.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2002年第3期36-39,共4页
Journal of the China Railway Society
基金
国家自然科学基金资助项目 (60 0 71 0 1 2 )
关键词
漏泄同轴电缆
有限差分法
电容
特性阻抗
计算
电容值
leaky coaxial cable
finite difference method
capacitance
characteristic impedance
