Abstract：The mechanism of dry galloping of stay cable was studied by means of CFD simulations and wind tunnel tests. First, CFD simulations on 2-D and 3-D cable models were conducted by utilizing LES method incorporated in FLUENT software to obtain the wind pressure coefficients, mean drag and lift coefficients, correlation coefficients of fluctuating aerodynamic forces along the cable axis. Second, wind tunnel tests by using Particle Image Velocimetry (PIV) technique were carried out to specially investigate the characteristics of the flow in the cable wake. The results show that a sudden decrease of mean lift coefficient of the 3-D cable is observed, and a maximum minus galloping force coefficient, -4.74, is found. This means that large amplitude of galloping vibration of stay cable is possible to take place. Correlation coefficients of aerodynamic force coefficients on 3-D cable are smaller than the values of 2-D cable, and the correlations of drag coefficient are smaller than the values of lift coefficient. The axial flow behind 3-D cable is not obvious behind the inclined cable. The role of axil flow in cable vibration needs further quantitative investigations.
李寿英，曾庆宇，温晓光，陈政清. 斜拉索干索驰振机理的数值模拟与试验研究[J]. 振动与冲击, 2017, 36(11): 100-105.
Li Shouying,ZENG Qingyu, Wen Xiaoguang, Chen Zhengqing. Numerical and Experimental Studies on the Mechanism of Dry Galloping of Stay Cable. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(11): 100-105.
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