摘要
为对比研究嵌套网格模拟结果与传统网格模拟结果间的差异,分别采用传统网格方法和嵌套网格方法开展了扁平钢箱梁气动特性参数识别研究.首先,基于理想平板模型,将2种网格的三分力系数和颤振导数识别结果与理论值进行对比,验证了数值模拟方法的准确性.其次,分别基于2种网格建立了某大跨度悬索桥主梁断面模型,开展气动参数识别,并对比2种模型结果.结果表明:采用嵌套网格数值模拟得到的理想平板三分力系数和颤振导数均与理论值吻合良好;基于嵌套网格方法可有效识别扁平钢箱梁断面的静力三分力系数和颤振导数;嵌套网格方法可以降低不同风攻角工况下的网格划分工作量,有效解决网格畸变过大的问题.
To compare the difference between the results of the overset grid and those of the traditional grid, the traditional grid technology and the overset grid technology were used to carry out the identification of the aerodynamic parameters of the flat steel box girder, respectively. Firstly, based on the ideal plate model, the accuracy of the numerical simulation method was verified by comparing the theoretical three-component force coefficients and the flutter derivatives with the numerical identification results of two meshes. Secondly, the main girder section model of a long-span suspension bridge was established by using two grids, and the three-component force coefficients and the flutter derivatives were identified and compared. The results show that the three-component force coefficients and the flutter derivatives of the ideal flat plate numerically simulated by the overset grid are in good agreement with the theoretical solutions. The static three-component force coefficients and flutter derivatives of the flat steel box girder section can be effectively identified based on the overset grid technology. The overset grid method can reduce the workload of grid division with different wind attack angles and effectively solve the problem of excessive grid distortion.
作者
温学华
王浩
张寒
徐梓栋
陶天友
Wen Xuehua;Wang Hao;Zhang Han;Xu Zidong;Tao Tianyou(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第5期841-847,共7页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金面上资助项目(51978155)
国家高层次人才特殊支持计划资助项目(W03070080)
中央高校基本科研业务基金资助项目(2242020k1G013)
江苏省自然科学基金资助项目(BK20190359)。
关键词
大跨度悬索桥
气动特性
嵌套网格
计算流体力学
抗风性能
long-span suspension bridge
aerodynamic characteristics
overset grid
computational fluid dynamics
wind-resistance performance
