横向激扰频率对上承式钢板梁桥横向振幅的影响  

Influence of Lateral Forced Frequency on Vibration Amplitude of Deck Bridge

作　　者：冯星梅[1] 史永吉[1] 

机构地区：[1]铁道部科学研究院,北京100081

出　　处：《桥梁建设》2002年第1期59-62,共4页Bridge Construction

摘　　要：以跨度 32m上承式钢板梁桥为例 ,针对桥梁的横向振动问题 ,将列车简化为移动质量建立了力学模型 ,应用大型软件MSC/DYTRAN进行了计算分析 ,研究了桥梁横向振幅与横向激扰频率的关系。通过计算分析 ,分别得到了在不同速度下模拟的空载货车和重载货车通过时桥梁的横向振幅与激振频率的关系 ,结果与实测值基本接近 ,这对通过快速计算确定引起桥梁横向拍振的蛇行运动频率具有创新和实用意义。In order to study the lateral vibration of bridge, as a example, the relation between the lateral vibration amplitude and forced frequency of 32 m-span deck steel plate girder bridge is analyzed by using a large scale program MSC/DYTRAN with simplifying the train as a moving mass. And this relation of empty vehicle and heavy vehicle at different speed are obtained through calculation. The results are consisted with the tested ones, so it has practical meaning on quickly determining the snake motion frequencies that can induce the lateral response of the bridge.

关 键 词：上承式桥 钢桥 板梁桥 横向振动 振幅 横向激扰频率 有限元法 

分 类 号：U448.212[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]