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考虑轮胎侧偏特性的跨座式单轨车桥耦合振动模型

DOI: 10.3969/j.issn.1674-0696.2015.03.02, PP. 7-11

Keywords: 桥梁工程,跨座式单轨交通,车辆-轨道梁耦合振动,侧偏特性,bridgeengineering,straddletypemonorail,coupledvibrationsystemofvehicleandbeam,corneringcharacteristic

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Abstract:

:?为研究跨座式单轨交通车辆-轨道梁系统的耦合振动,以重庆市跨座式单轨交通-预应力混凝土简支梁为研究对象,建立了车辆和轨道梁的耦合振动模型。每节车辆简化为15个自由度的动力系统,并考虑所有轮胎的侧偏特性。车辆运动微分方程由拉格朗日方程导出,轨道梁简化为欧拉梁,用模态综合法建立其运动微分方程。计算了列车以不同车速通过时轨道梁的动力响应,并与实测结果和不考虑轮胎侧偏特性的模型做了比较。计算结果表明:考虑轮胎侧偏特性的模型的计算值及变化规律更接近实测值;研究竖向耦合振动问题时可不考虑轮胎的侧偏特性,研究横向耦合振动问题时应该考虑侧偏特性的影响。

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