摘要
为使通过新疆"百里、三十里风区"的铁路抗风达到既安全又经济的目标,使用风区内气象站和铁路测风站风资料分析了风速风向的分布规律和两种站之间风速相关关系,采用极值I型分布推算确定了铁路沿线合理的设计风速。研究表明:十三间房和达坂城是两风区平均风速和最大风速的最大站,年平均风速分别为5.4 m/s和6.1 m/s,10 min平均最大风速分别为37.6 m/s和33 m/s;风区春夏季风速较大,冬秋季较小,各月平均风速差异显著,10 min平均最大风速较大站各月风速差异不显著,风速较小站各月风速差异显著;风区内10 min平均最大风速的最多风向为偏东风、偏北风和偏西风,十三间房风向最集中,乌鲁木齐风向最为分散。铁路站与气象站风速的线性回归方程拟和效果最好,能够用气象站最大风速推算其设计风速;推算各站设计风速的极值I型分布适合度显著;天山站和猛进东站50 a一遇设计风速是两风区最大值,分别是42.0 m/s和39.4 m/s,天山站和猛进站瞬时风速是两风区最大值,分别是56.6 m/s和54.8 m/s,其余铁路沿线设计风速和瞬时风速以两站为中心递减;每个站点设计风速应用范围是从站点到相邻站点距离的一半。
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.
出处
《干旱区地理》
CSCD
北大核心
2011年第6期941-948,共8页
Arid Land Geography
基金
铁道部科技研究开发计划项目(2008X012-B)
国家自然科学基金(40975097)
科技部行业专项(GYHY201006012
GYHY201106025)
中央院所科研业务项目(idm200809)资助
关键词
铁路
强风区
设计风速
新疆
railway
strong wind areas
designed wind velocity
Xinjiang
