摘要
以意大利某斜拉桥为工程背景,通过风洞实验和CFD数值模拟对闭口箱型主梁断面的静气动性能进行了研究.基于开源程序OpenFOAM,数值模拟了方形断面和不同攻角下主梁断面的静气动系数和表面压力系数分布,将模拟得到的结果与实验结果进行了对比分析,进一步研究了主梁断面下表面圆倒角对静气动性能的影响,并从流场的角度定性的对计算实验结果进行了机理解释.结果表明:OpenFOAM模拟得到的方形断面和不同攻角下主梁断面气动系数和实验结果基本吻合;对于闭口箱型主梁断面,下表面圆倒角对其气动性能有较大的改善作用.
Taking an Italian cable-stayed bridge as an engineering example,the aerostatic characteristics of closed-box deck section are investigated using both wind tunnel test and CFD numerical simulation.Based on the open source code OpenFOAM,the aerostatic coefficients and pressure coefficients distribution of square section and bridge deck section under different attack angles are numerically simulated.The simulation results are compared with the experimental data from the wind tunnel test.The effects of bottom surface chamfers on the aerostatic characteristics are also studied.Furthermore,the simulated wind flow around the box deck section is carried out to explore the mechanisms of the experimental results.The results show that the aerostatic coefficients of square section and bridge deck section under different angles of attack obtained from the test and the simulation match well.The aerostatic performance of closed-box deck section can be improved by using a rounded chamfer on the bottom surface.
出处
《武汉理工大学学报（交通科学与工程版）》
2016年第3期437-441,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目资助(51478087)
关键词
数值模拟
OPENFOAM
主梁断面
气动性能
三分力系数
numerical simulation
OpenFOAM
bridge section
aerostatic characteristic
aerostatic coefficient
