摘要
介绍了建筑物避雷系统中钢结构体雷电暂态响应的计算方法，将钢结构体分支导体的电气参数等值地表示为阻抗和电容矩阵，分别采用诺伊曼（Ｎｅｕｍａｎｎ）公式和平均电位法计算了这些矩阵。在确定分支导体电气参数的基础上，钢结构体被转化为一个由一系列耦合π型电路组成的等值网络。为了计及分支导体阻抗参数频变特性对雷电暂态响应的影响，首先在频域中建立描述等值网络的方程，再运用指数采样的傅里叶反变换求取时域雷电暂态响应。计算结果与试验结果比较表明。
? An efficient method is presented in this paper to calculate the lightning transient responses in the building steel structure. The electric parameters of conducting branches in the steel structure are represented in impedance and capacitance matrices, respectively. Based on the electric parameters, the steel structure is converted to an equivalent network constituted for a series of coupled π type circuits. The equations of the equivalent network are set up in the frequency domain to take account of the frequency dependent impedances. Then, the Fourier transform with exponential sampling is used to obtain the lightning transient responses. The calculated results are compared with the measured ones and a better agreement is shown between them.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第6期103-107,共5页
Journal of Tsinghua University(Science and Technology)
基金
北京市自然科学基金
国家教委博士点基金
关键词
建筑物
钢结构
频变特性
雷电暂态响应
避雷系统
building steel structure
frequency dependent characteristic
lightning transient
