西南交通大学学报2025，Vol.60Issue(5)：1178-1185,8.DOI:10.3969/j.issn.0258-2724.20230382
连续梁竖向刚度对高速磁浮列车-桥梁动力响应的影响
Influence of Vertical Stiffness of Continuous Girder on Dynamic Responses of High-Speed Electromagnetic Suspension Train and Bridge
摘要
Abstract
Vertical stiffness is critically significant for the operational safety and ride comfort of high-speed electromagnetic suspension(EMS)trains on bridges,constituting one of the essential design parameters in bridge engineering.By using a three-span continuous girder as the study object,the vertical stiffness was modified by adjusting the cross-sectional moment of inertia.A coupled vibration analysis of the EMS train-bridge system was conducted under varying train speeds,rated suspension clearances,and temperatures.The variation rules of the dynamic coefficient of the bridge,acceleration of the train,and suspension clearance change with the adjustment coefficient of vertical stiffness of the bridge were discussed.The results show that when the adjustment coefficient of stiffness decreases to about 0.75,the dynamic coefficient of the bridge increases rapidly,and the vertical acceleration of the train is more sensitive to the vertical stiffness variation of the bridge than the suspension clearance change.When the cooling deformation is considered,higher train speed indicates greater vertical dynamic response of the bridge,and the track irregularity and rated suspension clearance have no obvious influence on the dynamic coefficient of the bridge.Higher train speed indicates smaller rated suspension clearance.When the effects of track irregularity and cooling deformation are considered,the adjustment coefficient of vertical stiffness of the bridge corresponding to the same vehicle dynamic response is larger.关键词
竖向刚度/常导高速磁浮列车/连续梁桥/车桥耦合/动力响应Key words
vertical stiffness/high-speed EMS maglev train/continuous girder/train-bridge coupling/dynamic response分类
交通工程引用本文复制引用
陈绪黎,向活跃,田祥富,李永乐,曹文杰..连续梁竖向刚度对高速磁浮列车-桥梁动力响应的影响[J].西南交通大学学报,2025,60(5):1178-1185,8.基金项目
国家自然科学基金项目(52322811,51978589) 中铁四院常导高速磁浮桥梁系统关键技术研究(2019K108). （52322811,51978589）
