Wind Characteristic Analysis of 100-Kilometer Wind Area in Lanzhou-Xinjiang High-Speed Railway

Abstract

The wind speed data collected by 49 disaster prevention and mitigation system monitoring stations in 100-Kilometer Wind Area in Lanzhou-Xinjiang High-Speed Railway were adopted as sample data, and the temporal-spatial characteristics of strong wind in 100-Kilometer Wind Area in year 2015 were analyzed by extreme wind speed temporal-spatial statistics method, time distribution statistics method of strong wind and wind rose diagrams. The analysis result indicates that the 100-Kilometer Wind Area is characteristic of high wind speed, long wind period and stable wind direction. The distribution of strong wind in 100-Kilometer Wind Area possesses obvious regional distribution characteristic. Specifically, the extreme wind speed within the area can reach 40.1m/s at highest, and the locations with an extreme wind speed higher than 35m/s are mainly distributed between mileage K2982 and K3033. Besides, the extreme wind speed reduces from the middle to both east and west sides. The number of strong wind days in 2015 is 216, the number of strong wind days with a wind speed ≥24.5 m/s is 121 and the number of strong wind days with a wind speed ≥32.7 m/s is 32, thus the wind period is long. The dominant wind direction at each wind speed monitoring station is mainly centered between NNE and NNW, and the wind is mainly demonstrated as transverse wind perpendicular to the line direction, and the wind direction is stable.