小半径反向曲线桥梁车致振动试验研究

发布时间：2018-01-04 02:44

本文关键词：小半径反向曲线桥梁车致振动试验研究　出处：《铁道学报》2017年09期 　论文类型：期刊论文

【摘要】：结合宁波北站铁路枢纽东疏解线新建小半径反向曲线桥梁动载试验,阐述列车通过曲线桥梁的耦合振动分析理论,根据实测结果对桥梁结构横向自振频率、横向和竖向加速度、横向振幅与位移进行分析,评定列车通过该小半径反向曲线桥梁的运营性能。根据试验分析结果,对小半径反向曲线上桥梁动力特性的理论分析进行验证和比较,提出桥梁有限元模型中基础刚度计算修正的建议。然后,根据修正后的桥梁计算模型,进一步对本桥车桥耦合振动响应进行数值分析,提出货运列车通过该桥梁的合理运行速度及相关建议。
[Abstract]:According to Ningbo railway hub station east sparse solution line of new small radius curve reverse bridge dynamic testing, analyzing theory of coupled vibration of train bridge through the curve, according to the measured results of bridge transverse vibration frequency, horizontal and vertical acceleration, lateral displacement and amplitude were analyzed, the operating performance through small radius curve bridge reverse evaluation the train. According to the experimental results, the dynamic characteristics of small radius curve on the reverse validate the theory analysis and comparison, put forward correction calculation of foundation stiffness of bridge finite element model is proposed. Then, according to the modified calculation model of bridge, further on vehicle bridge coupled vibration of the bridge response numerical analysis, put forward reasonable operation the speed of freight trains through the bridge and the relevant suggestions.

【作者单位】：上海工程技术大学城市轨道交通学院;同济大学土木工程学院;
【基金】：国家自然科学基金(51478258)
【分类号】：U446.1
【正文快照】： 列车-桥梁直线上动力相互作用研究国内外成果颇多,但关于列车通过曲线桥梁的振动研究相对较少。20世纪末,我国铁路科研工作者李德建[1]、单德山[2]和田杰[3]等,对列车通过曲线桥梁的耦合振动进行了研究,取得一些成果。Degrande[4]、Yang[5]对高速列车和移动荷载列通过曲梁的振

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