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以大客车、小汽车、半挂车车身为研究对象,采用CFD(Computational Fluid Dynamics)数值方法对风-车-桥耦合的车辆气动力特性进行了分析研究。模拟计算了不同工况下车辆的气动力系数,分析了车辆气动力的变化规律,计算出车辆发生侧倾、侧滑的安全临界风速。研究表明,不同车辆类型行驶于不同截面类型桥梁位置时车辆的气动力特性差异较大,进行车辆的安全性分析时车辆气动力系数应考虑车辆类型、桥梁截面形式、车辆的位置以及车辆所受的合成风偏角的影响。
Taking the bus, the car and the semi-trailer body as the research objects, the aerodynamic characteristics of the wind-vehicle-bridge coupling vehicle are analyzed and studied by CFD (Computational Fluid Dynamics) numerical method. The aerodynamic coefficient of the vehicle under different working conditions is simulated and the variation law of the aerodynamic force of the vehicle is analyzed to calculate the safety critical wind speed of the vehicle when the vehicle is rolling and sliding. The research shows that the aerodynamic characteristics of vehicles vary greatly when different types of vehicles are traveling on bridges with different cross sections. The aerodynamic coefficients of vehicles should be taken into account when considering the type of vehicle, the cross-sectional form of the bridge, the location of the vehicle, The effect of synthetic wind declination.