核电磁脉冲在岩土介质中的传播研究

An Investigation on Propagation of NEMP into Rock and Soil Media

综述了对非铁磁性、线性、各向同性介质中核电磁脉冲传播规律研究方面的一些成果。通过建立康普顿电流模型 ,采用 FDTD法 ,对地面核爆炸 SREMP数值分析的结果表明 ,厚度为几十米以上的具有一定导电性的岩土介质层 ,对于电磁脉冲峰值场强的衰减可达一个量级以上 ,且使脉冲上升沿变缓。采用两种模型对 HEMP的入地传播问题进行计算分析 ,将电磁脉冲模拟器架设于隧道顶上作试验研究 ,得出了类似的结论。

This paper is a summary of some achievements made by the authors on the propagation rules of NEMP into isotropic non ferromagnetic linear media.SREMP produced by surface nuclear burst were analyzed numerically by FDTD method based on the Compton current model.The results show,in rock and soil media with thickness of dozens of meters and conductivity of some extent,the attenuation of peak values of NEMP can amount to more than an order and the leading edges of pulses also slow down.Similar results were drawn from calculation of the propagation of HEMP into ground in two models and experiments with a EMP simulator illuminating on the top of a tunnel.Affects of the dispersion in rock and soil media on propagation of NEMP were also discussed.