高电压技术2017，Vol.43Issue(5)：1445-1452,8.DOI:10.13336/j.1003-6520.hve.20170428008
雷电流作用下金属损伤试验的影响因素
Influence Factors of Metal Materials Struck by Simulated Lightning Currents
摘要
Abstract
Due to the lack of reseaeching the influential factors of experiment on metal materials struck by simulated lightning currents in China and at abroad,we investigated the influences of electrode shape,copper fuse,and experiment distance on metal damage results based on experimental and theoretical methods.The results show that,in the metal damage experiment with the simulated first return stroke,continuing current of interval stroke and long continuing current,increasing the diameter of copper fuse only leads to an increase of damage depth.The streamer developing zone enlarges and the transferred energy in unit area decreases with experiment distance longer,which increases the damage area and decreases the damage depth.Using the cone electrode leads to the smallest radius of streamer initiation region and development zone,followed by using the semi-ellipsoid and hemisphere electrode.For this reason,using cone electrodes leads to the severest results both in damage area and depth,followed by the semi-ellipsoid and hemisphere electrode.Damage area decreases with electrode diameter decreasing for the same shape electrode,while the damage depth increases with electrode diameter decreasing.关键词
雷电流/金属材料/试验电极/试验距离/损伤深度/损伤面积Key words
lightning currents/metal material/experiment electrode/experiment distance/damage depth/damage area引用本文复制引用
刘亚坤,戴明秋,肖瑶,刘全桢,刘宝全,傅正财..雷电流作用下金属损伤试验的影响因素[J].高电压技术,2017,43(5):1445-1452,8.基金项目
国家自然科学基金(51577117).Project supported by National Natural Science Foundation of China(51577117). （51577117）
