关键词: 基本风压, 阵风系数, 地面粗糙长度, 极值分布, 最大似然估计

Abstract: A new method is proposed to correct the wind speed data in the non-standard terrain on the basis of daily records. The reference wind speeds of Beijing and Dalian are calculated based on the original and corrected wind data, respectively. The corrected data are more close to the stationary process because the terrain variations of the meteorological station have been taken into consideration by the correction coefficient. It’s concluded through likelihood ratio tests that the Gumbel distribution is a valid model for the statistics of annual maximum wind speed and the corrected wind data shows better statistical characteristic. It is suggested that the wind records in the non-standard terrain should be corrected in advance to obtain the reliable reference wind pressure.

Key words: reference wind pressure, gust factor, terrain roughness length, extreme values distribution, maximum likelihood estimation