大跨度公路城轨两用斜拉桥车桥耦合振动分析

发布时间：2018-01-14 09:01

本文关键词：大跨度公路城轨两用斜拉桥车桥耦合振动分析　出处：《铁道建筑》2014年01期 　论文类型：期刊论文

【摘要】：用多刚体结构模拟车辆,空间杆系单元模拟桥梁,建立车桥耦合动力系统。以某公轨两用斜拉桥为例,分别采用空间杆系单元模型与空间杆系—板混合单元模型分析了桥梁的自振特性,两种模型的计算结果吻合较好。针对空间杆系单元模型,采用动力时程分析方法,计算了轻轨车和汽车以不同车速通过该桥时的车桥耦合空间振动响应。计算结果表明:桥梁具有足够的竖向与横向刚度,车辆通过桥梁时的舒适性与安全性能满足要求,轻轨车和汽车同时过桥时相互之间存在影响。
[Abstract]:The vehicle is simulated with multi-rigid body structure and the bridge is simulated by space bar element. The coupling dynamic system of vehicle-bridge is established. A common-rail cable-stayed bridge is taken as an example. The natural vibration characteristics of the bridge are analyzed by the spatial bar element model and the spatial bar and plate mixed element model respectively. The calculated results of the two models are in good agreement. The dynamic time history analysis method is used to calculate the coupled spatial vibration responses of light rail vehicles and vehicles passing through the bridge at different speeds. The results show that the bridge has sufficient vertical and lateral stiffness. The comfortableness and safety performance of the vehicle passing through the bridge meet the requirements, and the light rail vehicle and the vehicle cross the bridge at the same time.
【作者单位】：郑州大学土木工程学院;中国水电顾问集团中南勘测设计研究院;
【基金】：中国博士后科学基金项目(2013M541995)
【分类号】：U441.3
【正文快照】： 大跨度斜拉桥属于轻型柔性体系桥梁,结构刚度和阻尼比相对较小,车辆荷载作用下结构的动力敏感性尤其显著。因此,当列车和汽车同时通过该类型桥梁时车桥系统的动力响应及车辆在桥上运行时的安全性、舒适性就越来越为工程界所关注。目前,关于斜拉桥的列车—桥梁耦合振动分析文

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