铁路大跨度简支钢桁梁桥车-桥耦合振动研究

发布时间：2018-05-09 21:55

本文选题：大跨度钢桁梁桥 + 车-桥耦合　；参考：《地震工程学报》2017年05期

【摘要】：桥梁作为线路工程中不可或缺的重要枢纽,对列车通过桥梁时,桥梁和车辆之间相互作用的问题迫切需要做出解答,特别是针对铁路钢桁梁,并考虑大跨度简支特性的车-桥耦合振动问题研究更具有一定的理论与实际意义。以黄韩侯铁路新黄河特大桥156 m简支钢桁梁桥作为工程背景,建立车辆动力模型、桥梁有限元模型并考虑轮轨关系,以蛇形运动和轨道不平顺作为系统的自激激励源,利用大型有限元软件ANSYS以及UM(Universal Mechanism)动力学分析软件联合进行仿真分析,实现单个机车、编组客车和编组货车以设计时速通过桥梁时对大跨度简支钢桁梁桥车-桥耦合振动的研究。经过计算分析得出:大跨度钢桁梁桥的横向刚度相对较小;不同编组情况以设计时速通过桥梁时,车辆和桥梁的各项动力响应参数均在规范允许的范围之内;编组货车通过桥梁时,桥梁跨中横向、竖向加速度较之其他编组情况要大。
[Abstract]:As an indispensable and important hub in railway engineering, the bridge needs to be solved urgently when the train passes through the bridge and the interaction between the bridge and the vehicle, especially for the railway steel truss. The study of vehicle-bridge coupling vibration with long span simply supported is of theoretical and practical significance. Taking the 156m simply supported steel truss bridge of Huanghanhou Railway New Yellow River Bridge as the engineering background, the vehicle dynamic model, the finite element model of the bridge and the wheel-rail relationship are established, and the snake motion and track irregularity are taken as the self-excited excitation source of the system. A large finite element software ANSYS and UM(Universal Mechanism are used to simulate and analyze the vehicle-bridge coupling vibration of a large span simply supported steel truss bridge when the speed of the bridge is designed by a single locomotive, a marshalling bus and a marshalling truck. Through the calculation and analysis, it is concluded that the transverse stiffness of the long-span steel truss bridge is relatively small, and the dynamic response parameters of the vehicle and the bridge are all within the scope permitted by the code when different marshalling conditions are designed to pass through the bridge at different speeds. When the marshalling truck passes through the bridge, the transverse and vertical acceleration of the bridge span is greater than that of other marshalling.
【作者单位】：中国科学院西北生态环境资源研究院冻土工程国家重点实验室;中国科学院大学;兰州交通大学土木工程学院;中交第一公路勘察设计研究院有限公司高寒高海拔地区道路工程安全与健康国家重点实验室;
【基金】：国家自然科学基金(41401077,41630636) 中国科学院西部之光“西部博士”项目(51Y351211)
【分类号】：U211.3;U441.7

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