近年兰新线和南疆线主要风区大风特征研究

Study on Gale Characteristics in Main Wind Areas of Lanzhou-Urumqi Raillway and Turpan-Kashgar Raillway in Recent Years

为完善新疆大风区铁路行车组织办法和防风减灾对策,为今后的研究工作提供依据,利用兰新线百里风区、南疆线前百公里风区大风特征统计数据,归纳出2个风区具有风速高、风期长、季节性强、风向稳定的规律,得到风区的风速地域分布特征。根据兰新线百里风区和南疆线前百公里风区的主要测风站统计数据,出现8级及以上大风年平均天数分别超过120 d和150 d,最大瞬时风速分别达52.1 m/s和61.6 m/s。2个风区年极值风速大多出现在冬春交替之际,大风风向均在西北偏西和东北偏北之间。通过统计分析测风站记录的最大2 min平均风速平均值,得到风区风速地域特征分布曲线。

In order to improve the organization of train operation in wind areas of Xinjiang and wind protection and disaster mitigation projects,and to provide a basis for future research work,statistical analysis data on the characteris⁃tics of gale in a long stretch of the wind area of the Lanzhou-Urumqi Raillway and the Turpan-Kashgar Raillway were used to summarize the two wind areas with high wind speeds,long wind periods,strong seasonality and stable wind patterns,and to obtain the characteristics of the geographical distribution of wind speeds in the wind areas.The annual average days of strong wind above Grade 8 at the wind measuring stations in the two wind areas of the Lanzhou-Urumqi Raillway and the Turpan-Kashgar Raillway exceed 120 d and 150 d respectively,and the maximum instanta⁃neous wind speed can reach 52.1 m/s and 61.6 m/s respectively.The maximum annual extreme values in the two wind areas are mostly at the turn of winter and spring,and the strong wind direction is between northwest by west and north⁃east by north.The regional characteristic distribution curve of wind speed in the wind areas is obtained by statistical analysis of the maximum 2 min average wind speed recorded by the wind measuring station.