Ｓtudy of numerical method in time domain on a skin current ofground laying shielded cable excited by electromagnetic pulse

A numerical method in time domain on skin current of ground laying shielded cable excited by electromagnetic pulse is studied. The method overcomes the ambiguity of the transmission line theory in studying such a problem. The finite difference time domain (FDTD) method based on the scattering of thin wire which can solve the problem effectively is derived. An extensional Gedney perfectly matched layer is developed. It can be used to truncate FDTD lattices of lossy media.The method is used to simulate the distribution of a skin current and characteristics of waveform on a ground laying shielded cable excited by the electromagnetic pulse. The problems are studied experimentally in the radiated EMP simulator.Compared with experimental data, the numerical results proved to be reliable．