科研之友
微信
新浪微博
Facebook
分享链接
摘要
A time-domain hybrid method is presented for efficiently solving the coupling problems of long cables above the ground excited by electromagnetic pulses. The proposed method is combined with transmission-line (TL) equations, finite-difference time-domain (FDTD) method, and a novel fast calculation approach for excitation fields of long cables. In this hybrid method, the effect of the ground on the incident wave is equivalent to a time-domain reflection wave source, and the excitation fields of long cables are computed by the superposition of electric fields created by the incident and reflection wave sources. Then, the TL equations are employed to build the coupling model of long cables and the excitation fields are introduced into the TL equations as distribution sources. Finally, the transient responses on long cables are obtained by the TL equations with the FDTD method. Two examples are given to demonstrate the accuracy and high efficiency of this method. It shows that this method can tremendously decrease the memory requirement and computation time compared with the FDTD method, and has the ability of fast simulating the coupling problem of long cables excited by multiple pulse sources.
