基于数值仿真实验研究接闪杆的高度对雷击点的影响

Study on the Influence of Lightning Rod Height on Lightning Point Based on Numerical Simulation Experiment

基于闪电数值仿真试验,通过改变接闪杆的高度,分析各雷击点位置出现次数,探讨接闪杆的高度对雷击点的影响,以及建筑物有无安装接闪杆情况下建筑物尖端对大气电场畸变效应的差异。结果发现:接闪杆的高度越高,则闪电击中建筑物拐角的概率越低;但是当接闪杆达到一定高度后,接闪杆高度继续增加,反而会导致雷击点位置落在地面的概率减小。接闪杆的安装降低了建筑物拐角处初始电场畸变值,削弱了建筑物拐角处的引雷作用,所以雷击点位置落在地面的次数增加了。

Based on the lightning numerical simulation test, by changing the height of the lightning rod, the number of occurrences of the lightning point position is analyzed, and the influence of the height of the lightning rod on the lightning point, and difference of distortion effect of building tip to atmospheric electric field with or without lightning rods in buildings are discussed. The results show that the higher the height of the lightning rod is, the lower the probability of the lightning strikes the comer of the building. But when the lightning rod reaches a certain height, the increase of the height of the lightning rod will cause the probability that the lightning point to fall on the ground reduce. The installation of the lightning rod reduces the initial electric field distortion at the comer of the building, weakening the firing at the comer of the building, so the number of lightning places on the ground has increased.