摘要
为探索雷电放电规律以满足雷电防护理论与技术研究的需要,以Amoruso和Lattarulo提出的三层带电圆盘模型为基础,提出了基于地面电场监测数据和遗传算法的雷云模型反演方法;并以反演得到的雷云模型为基础,确定求解区域的初始边界条件,结合介质击穿模型(DBM)和双向先导独立发展模式,实现了对雷电先导放电的三维高分辨率模拟,空间分辨率可达50m;结果表明:利用遗传算法反演的雷云模型在地面产生的理论场强与实测数据拟合良好;数值模拟的雷电双向先导主通道明显,分支丰富,可以反映出雷电放电的三维分形特征。
In order to explore the lightning leaders rule satisfying the academic and technical requirements, an inversion method of thun derstorm charged model is proposed based on the electric field detection data on ground and genetic algorithm, by employing the three level charged circular discs model recommended by Amoruso and Lattarulo. And on the basis of the inversion results, the initial boundary conditions of the interested region are determined. Through the combination of the dielectric breakdwon model （DBM） with the bidirectional leaders independent develop mechanism, a three--dimensional （3 D） numerical simulation of lightning discharge at 50-m resolution is presented. Results show that the electric field on ground determined by the inversion results fit the detection data well. And the main channels of the lightning bidirectional leaders are visible and branches of the leaders are prolific, which can present the 3--D characteristics of lightning discharges clearly.
出处
《计算机测量与控制》
CSCD
北大核心
2010年第8期1916-1918,1927,共4页
Computer Measurement &Control
基金
武器装备探索研究项目(7130933)
关键词
雷电
地面电场
遗传算法
DBM模型
数值模拟
lightning
electric field on ground
genetic algorithm
DBM model
numerical simulation
