位于闪电通道附近带孔缝的金属箱体耦合效应的仿真研究  

Simulation Research on Coupling of Metal Cavity Near the Lightning Channel

作　　者：丁洁[1] 刘昆[1] 张顺[1] 

机构地区：[1]成都信息工程大学电子工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2016年第6期565-568,共4页Journal of Chengdu University of Information Technology

基　　金：国家重点基础研究和发展资助项目(2014CB441405);国家科学自然基金资助项目(41305005);江苏气象观测与信息处理重点实验室研究基金资助项目(KDXS1406);四川省教育厅研究基金资助项目(16CZ0022)

摘　　要：针对位于闪电附近的带有一个孔缝的金属箱体的屏蔽效能开展研究。首先,依据山东人工触发闪电实验(SHATLE基地进行的人工触发闪电得到的距离闪电通道78 m处的磁场结果,验证仿真磁场的有效性。之后,通过建立仿真模型进行仿真与分析仿真数据得到距离闪电通道78 m处金属箱体的耦合效应。结果表明,闪电通道相对于金属箱体的位置对金属箱体内部的磁通密度的大小有很大的影响,依据仿真分析,为了电磁屏蔽与散热等目的,孔缝位于金属箱体顶部将会是较好的选择。Since the thin metal layers results in limited shielding effectiveness against the dominant magnetic field generated by a lightning pulse,research on the shielding effectiveness of metal cavity with slot placed near a lightning channel is of great significance. In this paper,the magnetic fields measured at 78 m distance from the classical rocket-triggered lightning flash during the SHandong Artificially Triggering Lightning Experiment（ SHATLE） were compared with simulated magnetic fields,acquiring good agreement. The coupling effects of metal cavity with a slot placed at a distance of78 m from the lightning channel are then simulated and analyzed based on the simulation model. According to the simulation results,the location of lightning channel relative to the cavity has a great impact on the magnetic flux density inside the cavity. For the electromagnetic shielding and cooling,the slot located at the top side of the cavity has better performance.

关 键 词：磁屏蔽 雷电防护 电磁分析 

分 类 号：TM153.1[电气工程—电工理论与新技术]