作　　者： ; ;

机构地区： 天津大学机械工程学院

出　　处： 《天津大学学报》 2007年第1期68-72,共5页

摘　　要： 基于计算流体动力学,采用数值模拟的方法研究了车桥耦合体系气动力特性和风压分布．首先选取了雷诺应力湍流模型,分别建立了桥梁单体模型、车辆单体模型和车桥耦合体系模型．计算了3个模型在不同风向角下的气动力系数,并对各自的风压分布进行了比较．车桥耦合体系考虑了车辆和桥梁的耦合效应,在不同风向角工况下,车桥耦合体系的气动力系数,包括升力系数、阻力系数和倾覆力矩系数,都明显增大．计算结果表明,车桥耦合体系与桥梁和车辆各自单体相比较,气动力系数差异较大,故设计中应对此给予重视,以确保行车安全． Aerodynamic characteristics and wind pressure distribution of vehicle-bridge coupled system is studied based on numerical simulation by computational fluid dynamic method. Renold stress turbulence model is chosen, and three computational models, i.e. single bridge, single vehicle and vehicle-bridge coupled system, are established respectively. Compared with the single vehicle and the single bridge model, the coupled effect between the vehicle and bridge is considered in vehicle-bridge coupled system. Aerodynamic force coefficients of the three models are calculated and wind pressure distributions of different models are compared in different wind directions. It is shown that aerodynamic force coefficients of vehicle-bridge coupled system, consisting of lift coefficient, drag coefficient and moment coefficient, significantly change in different wind directions. The results indicate that aerodynamic coefficients of vehicle-bridge coupled system are greatly different from that of single vehicle and that of single bridge, which should be concerned during bridge design to insure traveling safety.

关 键 词： 数值模拟 车桥耦合体系 气动力系数 风压分布 风向角

领　　域： [交通运输工程]