摘要
提出一种在风荷载作用下对列车桥梁时变系统空间振动响应进行仿真计算的有效方法 ,针对京沪高速铁路南京长江斜拉桥方案 ,考虑脉动风沿桥梁纵向的空间相关性 ,随机模拟出沿桥跨若干点处的风速时程曲线 ,采用时域分析法对脉动风作用下高速列车通过该桥时的车桥时变系统动力响应进行较详细的分析 ,从安全性与舒适性两方面计算分析该桥列车行车的临界风速 ,得出了该桥能确保安全与舒适行车的预警风速和能确保安全行车的封闭桥梁风速。
An efficient method for simulating the spacial dynamic responses of the time dependent railway vehicle bridge system under wind load is developed in this paper. In consideration of a scheme of the Yangtze River Bridge at Nanjing on Jing Hu high speed railway line, the wind speed curve in various points of the bridge are simulated taken into account the space relevancy of turbulent wind along spanwise of the bridge. A detailed dynamic response analysis is made for the time dependent vehicle bridge system under the action of turbulent wind when high speed train is in motion on the bridge. The critical wind speed for trains travelling on the bridge is analysed both from the running safety and comfort aspects. Finally, the warning & closed wind speed of the bridge are obtained with the objective of ensuring the running safety and comfort or running safety of trains respectively.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2001年第5期75-80,共6页
Journal of the China Railway Society
基金
铁道部科技发展计划项目 (97G0 6- B)
关键词
高速铁路
斜拉桥
行车临界风速分析
high speed railway
cable stayed bridge
critical wind speed for running of trains
