中南大学学报（自然科学版）2011，Vol.42Issue(4)：1150-1155,6.
青藏线棚车在强横风下的倾覆稳定性
Overturning stability of box-car on Qinghai-Tibet railway line with strong cross wind
摘要
Abstract
Scaled model and wind tunnel test were used to research on the aerodynamic performance of the box-car on 5 m high embankment and 15 m high bridge, and the relationship between the aerodynamic coefficients and the side sliding angle was gotten. Based on this, math models were built of the whole train overturning on the track and the car-body overturning on the bogie according to static moment balance, and the relationship between running speed and critical overturning wind speed was also gotten when they are running on straight and curve lines. The results show that the aerodynamic coefficients of the whole train increase with the increase of side sliding angle, and reach the maximum when the side sliding angle reaches 75° and decrease a little while on bridge. The critical wind speed of car-body overturning on bogie is less than that of train overturning on track, so train speed regulation should be based on car-body overturning on bogie. If train stays on a curve embankment or bridge, the critical wind speeds are 37.0 and 39.5 m/s separately, and if train speed is 100 kin/h, the critical wind speed is near 30 m/s. If train stays on a straight embankment or bridge, the critical wind speeds are 45.0 and 49.0 m/s separately. If train speed is 120 km/h, the critical wind speed is near 33 m/s.关键词
棚车/倾覆稳定性/风洞试验/气动性能/横风Key words
box-car/ overturning stability/ wind tunnel test/ aerodynamic performance/ cross wind分类
交通工程引用本文复制引用
高广军,段丽丽,苗秀娟..青藏线棚车在强横风下的倾覆稳定性[J].中南大学学报（自然科学版）,2011,42(4):1150-1155,6.基金项目
国家支撑计划项目(2006BAC07B03) （2006BAC07B03）
