摘要
雷电击中建筑物附近的有效截收面积A m是雷电灾害风险评估的基础因子之一,目前广泛应用标准IEC 62305—2规定的选取方法。计算中未考虑项目所在位置的雷电环境及项目特性,计算结果缺乏针对性。从雷击建筑物附近可能产生的风险出发,分析附近雷击点的危害方式及危害程度,探讨根据工程实际确定参数A m值的一般方法。得出结论:参数A m值应在分析确定可能造成危险的雷击点的最远距离的基础上定量计算,以保证计算结果的针对性、科学性。建筑物附近的雷击点以雷电电磁脉冲的形式对内部电气电子设备造成危害,危害程度与该点雷电流强度、建筑物规模及防护措施等因素有关。
The collection areof flashestriking neathe structure （Am ） ione of the basifactorin the light- ning risk assessment. The selection methodprovided by standard IE62305--2 iwidely used now, buthimeth- oddoenoconsidethe lightning environmenof the projecposition and the projeccharacteristics. So thathe calculation resullack specificity. The hazard mode and extenof the lightning strikenearby are analysed, and in- vestigated the general method to determine the valueof the parameterAm according to engineering practice from the possible riskwhen lightning strike buildings, and draw conclusion. Obtaining the parameterAm should be quantitative calculated based on the analyzing the maximum distance of the lightning possibly striking the structure in ordeto ensure the orientation and the scientifiof the calculation results. The lightning strike poinneathe building damage the internal electrical equipmenin the form of lightning electromagnetipulse, the extenof the in- jury relate to the thunderstorm currenintensity the building scale and otheprotective measures.
出处
《科学技术与工程》
北大核心
2013年第33期10093-10097,共5页
Science Technology and Engineering
关键词
雷电灾害风险评估
参数Am
雷电电磁感应
闪电定位资料
屏蔽空间
the lightning risk assessment factor Am lighting electromagnetism induction lightninglocation data screening spatial
