铁道科学与工程学报2025，Vol.22Issue(3)：1144-1153,10.DOI:10.19713/j.cnki.43-1423/u.T20240739
风屏障对公铁同层双幅桥-列车气动特性的影响
Effect of wind barrier on aerodynamic characteristics of twin parallel decks for rail-cum-road bridge and train
摘要
Abstract
The installation of wind barriers is an effective measure to ensure the safety of train operation on bridges under strong wind conditions.However,the impact of wind barriers on the aerodynamic characteristics of the train-bridge system is significantly influenced by the structural form of the train's lower part.To this end,through sectional model force measurement and pressure measurement wind tunnel tests,this article investigated the influence of wind barriers on the aerodynamic characteristics of China's first large-span,double-deck bridge with both rail and road layers-the train system.The results show that the effect of wind barriers on the average aerodynamic force coefficients of the railway main beam is basically similar under different wind direction angles.At a wind direction angle β=0°,the wind barrier mainly affects the fluctuating lift coefficient of the railway main beam.While at a wind direction angle β=180°,the wind barrier can mainly affect the fluctuating drag coefficient of the railway main beam.At a wind direction angle β=0°,the wind barrier has a minor impact on the fluctuating aerodynamic force coefficients of the highway main beam.While at a wind direction angle β=180°,the wind barrier can mainly affect the fluctuating drag coefficient and fluctuating lift coefficient of the railway main beam.At a wind direction angle β=0°,the wind barrier has a greater impact on the average drag coefficient of the train than at a wind direction angle β=180°.While at a wind direction angle β=180°,the wind barrier has a greater impact on the fluctuating drag coefficient of the train than at a wind direction angle β=0°.At a wind direction angle β=0°,the wind barrier mainly affects the average wind pressure coefficient at the windward side and the transition section between the windward side and the bottom arc,while at a wind direction angle β=180°,the wind barrier mainly affects the average wind pressure coefficient at the windward side and the transition section between the windward side and the top arc.The impact of the wind barrier on the average wind pressure coefficient of the train is closely related to the wind direction angle,leading to significant differences in the impact of the wind barrier on the aerodynamic forces of the train under different wind direction angles.At a wind direction angle β=0°,the wind barrier can effectively reduce the airflow fluctuation in the bottom arc transition section of the train,while at a wind direction angle β=180°,the wind barrier has a limited effect on reducing the airflow fluctuation in the top arc transition section of the train.The research results can provide a reference and basis for the design of wind barriers for similar types of double-deck bridges.关键词
风屏障/公铁双幅桥/车桥系统/风洞试验/气动特性Key words
wind barrier/rail-cum-road bridge/train-bridge system/wind tunnel test/aerodynamic characteristics分类
交通工程引用本文复制引用
邹云峰,刘政华,何旭辉,刘路路,杨甲锋..风屏障对公铁同层双幅桥-列车气动特性的影响[J].铁道科学与工程学报,2025,22(3):1144-1153,10.基金项目
国家自然科学基金资助项目(51925808) （51925808）
湖南省杰出青年科学基金资助项目(2022JJ10082) （2022JJ10082）
