横风作用下车桥耦合系统动力响应研究  

Study on Dynamic Response of Train Bridge Coupling System Under Crosswind

作　　者：宋满满 SONG Manman(China Railway Fifth Survey and Design Institute Group Co.Ltd.,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《铁道建筑技术》2022年第6期135-139,共5页Railway Construction Technology

摘　　要：本文以福厦铁路泉州湾跨海大桥3×70 m连续刚构桥为背景,基于刚体动力学方法及有限元方法建立车桥耦合振动模型,采用流体力学软件CFD计算列车在桥上时车桥系统三分力系数,并利用谐波合成法对脉动风场进行数值分析,研究横风作用下不同风速及车速的车桥耦合系统动力响应,以及桥上行车安全性及舒适性。结果表明:当风速达到20 m/s时,列车车速应低于300 km/h,当风速达到25 m/s时,列车车速应低于250 km/h;列车车速和风速越大,列车安全性指标越低。In this paper,based on the 3×70 m continuous rigid frame bridge of Quanzhou Bay Bridge on Fuzhou-Xiamen Railway,the vehicle-bridge coupled vibration model is established by the rigid body dynamics method and the finite element method,the three-component force coefficient of the vehicle-bridge system when the train is on the bridge is calculated by the fluid dynamics software CFD,and the harmonic synthesis method is used to model the fluctuating wind field.The dynamic response of the vehicle-bridge coupled system with different wind speeds and vehicle speeds under crosswind,as well as the safety and comfort of driving on the bridge are studied.The results show that the train speed should be lower than 300 km/h when the wind speed reaches 20 m/s,and the train speed should be lower than 250 km/h when the wind speed reaches 25 m/s.The safety index of the train decreases with the increase of wind speed and vehicle speed.

关 键 词：连续刚构桥 车桥耦合 谐波合成法 动力响应 横风作用 

分 类 号：U448.23[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]