摘要
风-车-桥耦合振动气动力是桥梁设计的必要参数,也是影响车辆安全性的重要指标.文章基于计算流体动力学(Computational Fluid Dynamics,CFD)理论,采用Fluent软件对横风作用下风-车-桥耦合振动气动力进行数值模拟分析.首先建立了城市轨道交通中地上运行部分桥梁及车辆的模型,模拟了在不同风攻角下的桥梁单体、车辆单体及车桥耦合系统的气动力系数,分析结果表明在不同的风攻角情况下,车辆、桥梁以及车桥系统的气动力系数会随着风攻角的改变而改变.同时,由于车辆和桥梁间的相互作用,车辆和桥梁的气动力较之两者单体均有所增大.因此,桥梁设计时要考虑两者之间的相互影响.
Aerodynamic of the coupled wind-vehicle-bridge is a necessary parameter for bridge design and an important index of the safety of vehicles as well. Based on the computational fluid dynamics（Computational Fluid Dynamics,CFD）theory,the aerodynamic forces of wind-vehicle-bridge coupling vibration under crosswind are numerically simulated and analyzed by Fluent. Firstly,the bridge and vehicle model of urban rail transit is established and the aerodynamic coefficients of the bridge,vehicle and vehicle-bridge coupling system under different wind attack angles are simulated. The analysis results indicate aerodynamic coefficients of vehicles,bridges and bridge will change with the change of wind attack angle. At the same time,due to the interaction between vehicle and bridge,the aerodynamic forces of the vehicle and the bridge are both increased. Therefore,when the bridge design,the interaction between the bridge and vehicle should be considered.
出处
《河南科学》
2017年第5期778-786,共9页
Henan Science
基金
国家自然科学基金青年基金项目(51108210
51508237)
江苏省博士后基金(1301048C)
江苏省自然科学基金青年(BK20140560)
江苏大学青年扶持基金(5621480001)
关键词
桥梁
气动力
风车桥
数值模拟
bridge
aerodynamic forces
wind-vehicle-bridge coupling system
numerical simulation
