基于CAD作图法的位置因子精细化雷击风险评估的研究

Research on Location Factor Refined Lightning Risk Assessment Based on CAD Mapping Method

位置因子作为雷击风险评估中风险风量计算的重要参数,其取值大小直接影响评估结果的准确性,现行雷击风险评估标准中给出的位置因子的取值,为典型经验值,取值的随意性导致了计算结果缺乏针对性,产生较大误差。针对以上问题,提出了位置因子的量化计算方法,位置因子应为考虑周围建筑物对评估对象影响时的雷击等效截收面积与其为孤立建筑物时雷击等效截收面积的比值。通过常见住宅小区进行实例计算,分析了现行计算标准的不足,验证了量化计算方法的合理性和有效性。

An important position as a risk factor of air parameters in the lightning risk assessment calculation,the accuracy of the evaluation results directly affects the accuracy of risk assessment results,location factor given current lightning risk assessment standard of the typical experience of value. The randomness of the value leads to the lack of pertinence of the calculation result and leads to great error. To solve the above problems,the calculation method of quantitative location factors put forward,location factors is the ratio of the thunderstrike equivalent area calculated as the buildings around it are taken into consideration to that of the thunderstrike equivalent area as the buildings are isolated. Finally,a common residential district is calculated,and the deficiency of the current calculation standard is analyzed. The rationality and validity of the quantitative calculation method are verified.