【摘要】 为探讨城市轨道交通U型梁车桥系统车桥耦合振动对周边环境的影响,采用线性化轮轨模型建立了31个自由度的车辆动力学模型。以重庆市轨道交通一号线工程中梁山以西高架区间所采用标准跨径为30m的单线小U结构为对象,采用自编程序和通用对机车车辆过桥时的车桥耦合振动进行了分析,实测了周边地面受到车桥耦合振动的响应,并通过计算与实测结果的对比分析对所建立的理论模型和编制的程序进行了验证,对U梁引起的环境振动进行了评价。结果表明,U型梁具有良好的环境振动控制效果。更多还原

【Abstract】 This paper purposes exploring the influence of dynamic responses of U-girder in vehicle-bridge system for urban rail transit on the surrounding environment.In order to study the influence,a rail vehicle dynamic model with 31 DOFs(degrees of freedom) is made by employing the linear rail model.A standard span of 30m single line U-shaped structure,which is in the elevated section of Chongqing City Metro Line Project in the west of Liang hill,is taken as the study object.The analysis of coupling vibration in vehicle-bridge system is performed by using a self-compiled program and compared with field test results to confirm the correctness of the dynamic model and the self-compiled program.Through the calculation and the analysis of measurement results,the environmental vibration induced by U-girder is evaluated.The results show that U-girder has remarkable effect on the environmental vibration control.更多还原