东南大学学报（自然科学版）2025，Vol.55Issue(5)：1444-1451,8.DOI:10.3969/j.issn.1001-0505.2025.05.026
超大跨度钢桁架高铁悬索桥涡振性能模拟研究
Numerical simulation on vortex-induced vibration of an ultra-long-span steel-truss high-speed railway suspension bridge
摘要
Abstract
Considering the strict requirements for the smoothness of high-speed rail and the potential vortex-induced vibration(VIV)risk of high-speed railway suspension bridges,a simulation study was con-ducted on the VIV performance of an ultra-long-span steel-truss high-speed railway suspension bridge.Taking the Wufengshan Yangtze River Bridge as the background,a finite element model of the bridge was established for the analysis of its modal frequencies and shapes.Based on the overset grid technology,a typical cross-section of the main girder was selected to establish a model based on computational fluid dynamics(CFD)applicable for VIV simulation under different wind attack angles,and the VIV response of the main girder was then calculated.On this basis,the power spectral density of the aerodynamic load was analyzed,and the distribution characteristics of the flow field around the main girder were investigated.The results show that the aerodynamic coefficients of the main girder identified by CFD are in reasonable agreement with the re-sults required by the wind tunnel test.At 0° wind attack angle,the main girder exhibits VIV with small ampli-tude at low wind velocities.At 3° wind attack angle,the main girder experiences vertical and torsional VIV with large amplitude at the wind speeds of 17.50 and 20.00 m/s with an evident lock-in range,respectively.The vortex shedding of the web members and the reattachment of the vortex shedding on the girder surface at high wind speeds may be the primary causes of the VIV on the bridge.关键词
悬索桥/钢桁梁/涡振性能/数值模拟/涡振机理Key words
suspension bridge/steel-truss girder/vortex-induced vibration performance/numerical simula-tion/mechanism of vortex-induced vibration分类
交通工程引用本文复制引用
高伟杰,陶天友,王浩,万乐山,颜王吉,邓鹏..超大跨度钢桁架高铁悬索桥涡振性能模拟研究[J].东南大学学报（自然科学版）,2025,55(5):1444-1451,8.基金项目
国家自然科学基金资助项目(52338011,52278486) （52338011,52278486）
中央高校基本科研业务费资助项目(2242024RCB0007) （2242024RCB0007）
江苏省自然科学基金资助项目(BK20240177). （BK20240177）
