实测风速分布特征及重现期模型评估

风荷载的模拟是风振响应分析的关键步骤,但缺乏实测风速数据的分析且风速存在一定的地域差异,精确的风荷载模型对于输电线路杆塔力学分析至关重要。本文通过统计在江苏省境内13个地市代表气象站的风速数据,运用GEV模型,Weibull模型、Rayleigh模型对其进行了统计规律的分析,拟合后提出了风速重现期的单变量控制方程,通过K-S方法检验得出单变量控制概率密度累积方程具有较强的稳定性,结果表明本文所采用的双指数高斯分布模型适用江苏大部分地区,可使用该模型作为计算风速重现期的参考。

Measured wind speed distribution characteristics and evaluation ofreturn period model

Wind load simulation is the key step of wind-induced vibration response analysis, but there is no analysis of measured wind speed data and there are certain regional differences in wind speed. Accurate wind load model is very important for the mechanical analysis of transmission line poles and towers. In this paper, the wind speed data of 13 representative me-teorological stations in Jiangsu Province are analyzed by using GEV model, Weibull model and Rayleigh model. After fit-ting, the single variable control equation of wind speed recurrence period is put forward. The cumulative equation of probability density of single variable control is obtained through K-S method test. The results show that the cumulative equation of probability density of single variable control adopted in this paper has certain stability. The double exponential Gauss distribution model is suitable for most areas of Jiangsu Province, and can be used as a reference for calculating the recurrence period of wind speed.