悬挂式单轨交通系统主梁通常为下开口钢箱梁,结构刚度小,车辆在风力作用下易发生横向摆动,从而影响结构安全性和乘车舒适性。本文以某旅游专线项目30m跨度简支段为工程背景,进行不同风速和不同车速下的动力响应仿真分析。采用有限元软件建立桥梁模型,采用多体系动力学软件建立车辆和轨道模型,将车辆、轨道系统和桥梁系统作为一个完整的系统进行联合仿真计算。采用CFD软件计算桥梁和列车的静力三分力系数和风荷载,并将静风力叠加到模型中形成风车桥耦合振动模型。计算结果表明,桥梁的横向动位移和竖向动位移随风速的增大而增大,横向位移变化更加明显,但随车速的增大,动位移变化不明显；车辆的平稳性随风速和车速增大而逐渐降低,车辆的横向平稳性对平均风更加敏感；所有工况中,车辆的竖向和横向Sperling系数最大值分别为2.49和2.62,表明运行车辆具有良好的平稳性。基于通用有限元软件和多体动力学软件进行风车桥耦合动力分析的联合仿真方法是可靠高效的；本研究成果可为悬挂式单轨交通系统的抗风设计与应用提供参考。

The main girder of suspension monorail transit system is usually steel box girder with lower opening. The structure stiffness is small, and the vehicle is prone to lateral swing under the action of wind, thus affecting the structure safety and ride comfort.SSIn this paper, the 30m span simply supported section of a tourist special line project is taken as the engineering background to conduct the dynamic response simulation analysis under different wind speed and different speed.SSFinite element software was used to build the bridge model, and multi-system dynamics software was used to build the vehicle and track models. The vehicle, track system and bridge system were co-simulated as a complete system.SSThe static three-component force coefficient and wind load of the bridge and train were calculated by CFD software, and the static wind force was superimposed into the model to form the coupling vibration model of the windmill bridge.SSThe results show that the transverse and vertical dynamic displacements of the bridge increase with the increase of wind speed, and the change of the transverse displacement is more obvious, but the change of the dynamic displacement is not obvious with the increase of vehicle speed.SSThe vehicle ride decreases with the increase of wind speed and speed, and the vehicle lateral ride is more sensitive to the average wind.SSIn all working conditions, the maximum values of the vertical and lateral Sperling coefficients of the vehicle were 2.49 and 2.62, respectively, indicating that the running vehicle had good smoothness.SSThe co-simulation method of coupling dynamic analysis of windmill bridge based on general finite element software and multi-body dynamics software is reliable and efficient.SSThe research results can provide reference for wind resistance design and application of suspension monorail transit system. S

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国家自然基金重点项目：高铁联合基金