为评估位于风场中的悬索桥结构在列车动力加载作用下的安全性及车辆运行平稳性，采用FLUENT软件对五峰山公铁两用大跨度悬索桥主梁断面流场进行CFD分析得到主梁的三分力系数，并采用小波分析法模拟桥梁周围的脉动风速时程，作为列车-桥梁动力相互作用系统振动响应计算的外部激励，同时考虑轨道不平顺及轮对蛇行，建立风-列车-桥梁系统耦合振动分析模型，编写计算程序模拟桥梁及车辆的动力响应，并详细分析不同工况下车辆运行安全性和乘车舒适性。结果表明：风速对桥梁动力响应的影响更加显著，且横向位移更易受风荷载影响；车辆横向加速度随风速和列车运行速度的提高急剧增大，但其竖向加速度变化较小；平均风速超过20 m/s时，300 km/h高速列车运行安全无法得到保证。研究结果可为同类桥梁的抗风抗振设计提供参考。

In order to evaluate the safety of the long-span suspension bridge structure located in the wind field and the running stability of the train under the dynamic loading of the train, the FLUENT software was used to conduct CFD analysis on the flow field of the main girder section of a certain long-span suspension bridge for both highway and railway to obtain the three-component force coefficients of the main girder, and the wavelet analysis method was used to simulate the fluctuating wind velocity time history around the bridge as the external excitation for the vibration response calculation of the train-bridge dynamic interaction system. At the same time, the track irregularity and the wheel-set hunting were considered, a coupled vibration analysis model of the wind-train-bridge system was established, and the calculation program was written to simulate the dynamic responses of the bridge and the vehicle, and the running safety and ride comfort of the train under different working conditions were analyzed in detail. Results show that wind velocity has a more significant impact on the dynamic response of the bridge. Moreover, the lateral displacement is more easily affected by wind load; The lateral acceleration of the vehicle increases sharply with the increase of wind velocity and train running speed, while its vertical acceleration changes less; When the average wind velocity exceeds 20 m/s, the operational safety of a high-speed train running at 300 km/h cannot be guaranteed. The research results can provide a reference for the wind and vibration resistance design of similar bridges.