Sensitivity Analysis of Electromagnetic Pulse Response of Buried Cable to Different Parameters

High-altitude electromagnetic pulse can induce high current and voltage on buried cables, it may pose a serious threat to the terminal equipment of cable. Many parameters would influence the amplitude and waveform of response, in addition, with the number of dimensions increase, statistical analysis methods may face the problem of dimensional disaster, so it is of great significance to study the sensitivity of response to uncertain parameters. This paper introduces the stochastic reduced order models (SROM) method, which is non-intrusive and straightforward to implement, it can approximate the statistical result of response with a small number of samples when compared with Monte Carlo (MC) method. The sensitivity of the electromagnetic pulse response of buried cable against different uncertain parameters is calculated, then, the importance of these parameters can be obtained based on their impact levels. Finally, the influence of the less important parameter on response is obtained when reduced it. The study result can provide relevant reference for the protection of buried cables to electromagnetic pulse.