铁道科学与工程学报2018，Vol.15Issue(4)：933-941,9.
高架简支箱梁与U梁车−轨−桥耦合振动分析
Analysis for vehicle-track-bridge coupling vibration of simply supported box-girder and U-girder
摘要
Abstract
A three-dimensional model of vehicle-track-bridge coupling vibration was established by Simpack based on multi-body dynamics and finite element method. The vertical and lateral vibration of box-girder, U-girder and track structure were analyzed when the train passes through the bridge. For the box-girder bridge, the influences of parameters of fastener, elastic support under the track plate and support were analyzed, and the reasonable range of each parameter was given. The results show that when the train passes the bridge at 80km/h speed, the spatial distribution of vibration of box-girder and U-girder is obviously different. The vertical vibration of the rail, track plate and the flange and web of box-girder should be focused, and the lateral vibration at the flange of U-girder can not be ignored. Increasing the stiffness of the fastener can obviously reduce the deformation of the rail, but the excessive stiffness will aggravate the vibration of the box girder and track structure, the vertical stiffness of the fastener should be within the range of 20~50 MN/m. Increasing the elastic support stiffness can reduce the vibration of the track plate, but the excessive stiffness will strengthen the rail vibration, the vertical stiffness of elastic support under the track plate should be within the range of (1.0~1.5) 103MN/m. Increasing the vertical stiffness of the support can reduce the vibration of the track plate and the box girder in a certain range, but the excessive stiffness of the support will make the vibration of the bridge increase, which is not conducive to the vibration reduction, the vertical stiffness of support should be within the range of (3~4) 103MN/m.关键词
耦合振动/箱型梁/U型梁/轨道结构/多体动力学/有限元法Key words
coupled vibration/box-girder/U-girder/track structure/multi-body dynamics/finite element method分类
建筑与水利引用本文复制引用
汪振国,雷晓燕,罗锟..高架简支箱梁与U梁车−轨−桥耦合振动分析[J].铁道科学与工程学报,2018,15(4):933-941,9.基金项目
国家自然科学基金资助项目(51478184,51268015) （51478184,51268015）
