雷电地面电场分布的3维DBM模型仿真参数影响分析

Analysis of Parameter’s Influence on Three-Dimensional Dielectric Breakdown Model to Lightning Electric Field Evaluation

采用荷电圆盘雷云解析模型作激励源,利用电介质击穿模型进行了地闪先导放电高分辨力3维数值模拟,得到了先导近地500 m时概率指数和击穿发展阈值对地面电场分布的影响。通过计算机模拟,得到了概率指数η和击穿阈值Ecrit对地面电场分布的影响,同时也验证了这2个参数对建立放电模型的重要性,为通过这一模型进行任意雷电发生时的地面电场分布模拟奠定了基础。

Based on a 3-D dielectric breakdown model （DBM） in an analytic thunderstorm model, an evaluation model was established near ground 500 m and the effect of η and Ecrit to electric field distribution on ground was done. Thus it verified the two diagrams to the evaluation model and laied the foundation for the further research on simulation of electric field distribution on ground.