Abstract:Taking the hangers of a large span suspension bridge as a research subject, carbon fiber material is used to replace steel material and the cross-section is made into rectangle. The 2D numerical simulations of hangers with the cross-section ratios of 1:1, 1:2 and 1:3 is conducted. Wind attack angle differs from 0 degree to 90 degree. Some wind vibration characteristic parameters are obtained. Therefore, the possibility of the vortex-induced vibration and galloping of the hangers are explored, and the corresponding critical wind speed is calculated. At the same time, the relationship between the Strouhal number St of the rectangular hangers of different section ratios and the wind attack angle is also known.
[1] 刘慕广. 两类大长细比桥梁构件的风振特性研究[D]. 湖南大学, 2009.
[2] 华旭刚, 杨维青, 温青, 等. 悬索桥并列双吊索整体风振特性与气动阻尼研究[J]. 铁道科学与工程学报, 2020, 17(1): 102-109.
HUA Xu-gang, YANG Wei-qing, WEN Qing, et al. Aerodynamic damping and wind-induced vibrations for coupled parallel twin hangers of suspension bridges [J]. Journal of Railway Science and Engineering, 2020, 17(1):102-109.
[3] 马存明, 廖海黎, 郑史雄, 等. H型截面吊杆气动性能的风洞试验[J]. 中国铁道科学, 2005, 26(4):42-46.
MA Cun-ming, LIAO Hai-li, ZHEN Shi-xiong, et al. Wind tunnel test of aerodynamic performance of H-shaped cross section hangers [J]. China Railwang Science, 2005, 26(4):42-46.
[4] 陈政清, 刘慕广, 刘光栋, 等. H型吊杆的大攻角风致振动和抗风设计[J]. 土木工程学报, 2010, 43(2): 1-11.
CHEN Zheng-qing, LIU Mu-guang, LIU Guang-dong, et al. Wind vibration and wind-resistant design of H-shaped hangers under large attack angles [J]. China civil engineering journal, 2010, 43(2): 1-11.
[5] 岳明. 悬索桥铰接式吊索涡激振动气动干扰效应数值分析[D]. 郑州大学, 2015.
[6] 徐昕宇, 陈星宇, 郑晓龙, 等. 扁平板式吊杆涡振性能及气动优化研究[J]. 铁道建筑, 2020, 60(6): 26-29.
XU Xin-yu, CHEN Xing-yu, ZHEN Xiao-long, et al. Investigation on Vortex⁃induced Vibration Performance and Aerodynamic Optimization of Flat⁃plate Hanger [J]. Railway Engineering, 2020, 60(6): 26-29.
[7] 王明猛. 碳纤维复合材料在高速列车上的应用研究[D]. 西南交通大学, 2012.
[8] Clough R W, Penzien J. Dynamics of structure[M]. 2nd. California: Computers and Structures Inc, 1995.
[9] 黄本才,汪从军. 结构抗风分析原理及应用[M]. 2 版. 上海: 同济大学出版社, 2008.
[10] 余化军. 圆柱和方柱绕流及矩形柱涡激振动的二维数值分析[D]. 天津大学, 2012.
[11] Sohankar A, Norberg C, Davidson L. Low-Reynolds number flow around a square cylinder at incidence: Study of blockage, onset of vortex shedding and outlet boundary condition [J]. Numerical Methods in Fluids,1998,26: 39~56.
[12] 毕继红, 余化军, 任洪鹏. 静止方柱和圆柱绕流的二维数值分析[J]. 三峡大学学报(自然科学版), 2012, 34(1): 41-45.
BI Ji-hong, YU Hua-jun, REN Hong-peng. Two-dimensional numerical simulation of flow over a static square cylinder and a static circular cylinder[J]. Journal of China Three Gorges University (Natural Sciences), 2012, 34(1): 41-45.
[13] 江帆,徐勇程,黄鹏. Fluent高级应用与实例分析[M]. 2 版. 北京: 清华大学出版社, 2018.
[14] 李鹏飞,徐墩义,王飞飞. 精通CFD工程仿真与案例实战:FLUENT GAMBIT ICEM CFD Tecplot [M]. 2版. 人民邮电出版社, 2017.
[15] Lyn D, Einav S, Rodi W, et al. A laser-Doppler velocimetry study of ensemble-averaged characteristics of the turbulent near wake of a square cylinder [J]. Journal of Fluid Mechanics, 1995, 304:285.
[16] 徐枫, 欧进萍. 方柱非定常绕流与涡激振动的数值模拟[J]. 东南大学学报(自然科学版), 2005(S1): 35-39.
XU Feng, OU Jin-ping. Numerical simulation of unsteady flow around square cylinder and vortex-induced vibration [J]. Journal of Southeast University (Natural Science Edition), 2005(S1): 35-39.
[17] 吕启兵, 杨斌, 杨忠超, 等. 串列双方柱绕流的数值模拟[J]. 重庆交通大学学报(自然科学版), 2013, 32(5): 1010-1013.
LV Qi-bing, Yang Bin, Yang Zhong-chao, et al. Numerical simulation of flow around two square cylinders in tandem arrangement. Journal of Chongqing Jiaotong University (Natural Science), 2013, 32(5): 1010-1013.
[18] 李聪洲, 张新曙, 胡晓峰, 等. 高雷诺数下多柱绕流特性研究[J]. 力学学报, 2018, 50(2): 233-243.
LI Cong-zhou, ZHANG Xin-shu, Hu Xiao-feng, et al. The study of flow past multiple cylinders at high Reynolds numbers [J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(2): 233-243.
[19] Norberg C. Flow around rectangular cylinders: Pressure forces and wake frequencies[J/OL]. Journal of Wind Engineering and Industrial Aerodynamics, 1993, 49(1): 187-196.
[20] 陈政清. 桥梁风工程[M]. 北京: 人民交通出版社, 2005.
[21] Parkinson G V. Smith J D. The square prism as an aeroelastic non-linear oscillator [J]. Quarterly Journal of Mechanics and Applied Mathematics. 1964, 17(2): 225-239.
[22] 许福友, 丁威, 姜峰, 等. 大跨度桥梁涡激振动研究进展与展望[J]. 振动与冲击, 2010, 29(10): 40-49+249.
XU Fu-you, DING Wei, JIANG Feng, et al. Development and prospect of study on vortex-induced vibration of long-span bridges [J]. Journal of vibration and shock, 2010, 29(10): 40-49+249.
[23] Sohankar A. Flow over a bluff body from moderate to high Reynolds numbers using large eddy simulation [J]. Computers & Fluids, 2006,35 (10): 1154-1168.