高山观缆车雷电灾害风险评估技术研究（英文）

Technology Research on Lightning Strike Risk Evaluation of a Cable Car

基于标准IEC62305-2提出的评估模型及评估方法,针对高山观缆车的结构功能及雷电损害特点,提出了切实可行的高山观缆车雷电灾害风险评估方法。考虑高山观缆车与一般建筑物的区别,应用三维作图法、区域雷电特征分析解决了观缆车倾斜布设导致等效截收区域高度不均,跨度大导致沿途雷电活动规律差异大的问题,确定了年预计雷击次数的计算方法;以不同类型损害过程及损失后果为基础,根据不同雷电防护措施对雷电侵袭的拦截效果,并结合标准提出的概率选取方法,确定了观缆车特有的雷电击中观缆车、等候区导致人员伤亡以及电气系统失效间接导致人员伤亡的损害概率的计算方法。

According to structure function and lightning damage of a cable car, a feasible method of lightning strike risk evaluation for a cable car was put forward based on the evaluation model and evaluation method in the standard IEC62305-2. According to the difference between common buildings and cable cars, problems of height non-uniformity of equivalent section caused by inclination of the cable car and diversity of lightning activity regularity caused by the large area were resolved, and expected annual average frequency of lightning strike was calculated using three dimensional graphic approach and regional lightning characteristic analysis. Based on different types of damage process and loss consequences, according to interception effect against lightning invasion of the lightning protection measures and the method of probability selection proposed in the standard, the probability of casu- alty caused by direct lightning strike in a cable car and a waiting area as well as probabilities of casualty caused by failure of electronic information systems were cal- culated.