基于FLUENT的移动车辆下的车桥气动特性研究

为了研究车桥系统中车辆和桥梁之间的气动影响以及车桥系统的气动特性,基于流体软件FLUENT分别建立了车辆、桥梁、车桥系统的三维分析模型,计算了侧风下移动车辆和桥梁的气动力参数.结果表明：车桥之间有明显的相互气动影响,车辆的存在使得桥梁气动力参数增大,车桥之间的气动干扰显著影响了车辆气动力参数;与静止车辆相比,移动车辆的气动力参数普遍偏大;车速与风速对车辆的气动力参数影响显著,对桥梁影响较小.

Study on aerodynamic characteristics of vehicle-bridge with moving vehicles based on FLUENT

In order to study the aerodynamic interaction between the vehicle and bridge, and the aerodynamic characteristics of the vehicle-bridge system, the three dimensional analysis model of vehicle, bridge and vehiclebridge system was built based on software FLUENT, and the aerodynamic coefficients under the cross wind were calculated. The results show that the aerodynamic interaction between the vehicle and bridge is obvious, the existence of vehicle increases the aerodynamic coefficients of the bridge, and the aerodynamic interference between vehicle and bridge obviously influences the aerodynamic coefficients of vehicle. Compared with the static vehicle, the aerodynamic coefficients of the moving vehicle are generally larger, and the speed of vehicles and wind speed have significant effect on the aerodynamic coefficients of vehicles, but less impact on the bridge.