Design wind speed along railway in Baili and Shanshili Wind Area, Xinjiang

Based on the wind data of weather observed stations and railway wind observed stations in the Baili and Sanshili wind areas of Xinjiang,the spatial distribution of wind speeds and wind directs was analyzed,and the correlations between railway station wind speeds and weather station wind speeds was also analyzed.The design wind speeds were educed by applying the NO.I distribution curve of extreme value frequency.The results show as follows: the average wind speeds and the average 10 minutes maximum wind speeds of Shisanjianfang and Dabancheng are the biggest in their own wind areas,their average annual wind speeds are 5.4 m/s and 6.1 m/s,respectively;their average 10 minutes maximum wind speeds are 37.6 m/s and 33 m/s,respectively.In these two wind areas,the wind speeds are bigger in spring and summer,smaller in autumn and winter,the differences in average monthly wind speeds are significant at all stations,the differences in average monthly wind speeds are significant at the stations whose average 10 minutes maximum wind speeds are small,the differences in monthly wind speeds are not obvious at the stations whose average 10 minutes maximum wind speed is larger.The directs of winds with average 10 minutes maximum wind speeds are near east,north and west,these wind directs are different from that of the maximum wind speed,the direct of the average 10 minutes maximum wind speed is most concentrative in Shisanjianfang,while it is most dispersive in Urumqi.By applying the exponential formula of wind variation with height,all the wind speed of railway wind observed stations is revised to the speed at 10 m height which is the same as the height of wind at weather observed stations.The fitting performance of wind speed's linear regression equation is best between railway observed stations and weather observed stations,so the 10 minutes maximum wind speed's series of railway line can be obtained with simulation of 10 minutes maximum wind speed of weather stations.The No.I distribution curve of extreme value frequency is established for calculating design wind speeds,and the fitness of the curve is good verified by applying Kolmogorov test,and the design wind speeds of railway observed stations can be calculated by the induced maximum wind speed of weather observed stations and No.I distribution curve of extreme value frequency.The 50 a return period's design wind speeds of Tianshan Station and Menjindong Station are the biggest in own wind areas,they are 42.0 m/s and 39.4 m/s,respectively,the instantaneous wind speeds of Tianshan Station and Menjin Station are the biggest in own wind areas,they are 56.6 m/s and 54.8 m/s,respectively,the instantaneous wind speeds and the 50 a return period's design wind speeds of the other stations are descended around the two stations;The applying range of each station's design wind speed is half of the distance between the station and another adjacent station.All the results are the scientific gist of safe and economized railway wind resistant design.