雷击风险评估中雷击大地年平均密度的计算

Calculation of lightning average density in the Lightning risk assessment

通过统计分析海南19个市县的雷暴资料,利用克里金(krig ing)插值法,计算海南任一经纬度上的多年平均雷暴日数,比较分析雷击大地年平均密度计算的两种方法,以人工观测的雷暴资料和闪电定位系统资料的时限为权重系数,计算评估点的综合N g值。结果表明引入时间权重为区间值的时序多指标决策TOPS IS方法计算雷击大地综合年平均密度是确定雷击风险评估中N g值的可行方法。

Statistics analysis 19 cities in Hainan of thunderstorm data, make use of a KRIGING interpolation method, compute an average thunderstorm day for any longitude and latitude degrees in Hainan, analysis two kinds of calculation methods for lightning average density, with the artificial of thunderstorm data and lightning position system the time limit of system data for the power weigh coefficient, calculation synthesize Ng value of risk assessment. As a result show that make use of time power weigh be worth for the zone of cycle time many index sign decision TOPSIS method, calculate synthesize lightning average density to be. feasible at lightning risk assessment.