Abstract：Aiming at the wake galloping of parallel cables of cable stayed bridges with central cable planes, numerical simulation study is performed in this paper based on fundamental galloping theory combining with large eddy numerical simulation technique. In the study, galloping theory is firstly reviewed, furthermore numerical simulation technique of large eddy method is utilized to obtain static wind load on parallel cables under transverse wind. The effects of upwind cables on downwind ones are investigated by comparing the three-component coefficients under different wind attack angles. The discrimination rule and onset wind speed of wake galloping for parallel cables are developed on the basis of discrimination principle of galloping. The results show that galloping instability will not happen on upwind cables. But the downwind cables have great possibility of wake galloping instability. Analysis results also show that increasing the structural damping and the local vibration frequencies of parallel cables will effectively improve the onset wind speed of wake galloping. In the end, the measure by connecting parallel cables with connectors to increase the local vibration frequencies is suggested and it is proved that this measure can greatly increase the wake galloping stability of parallel cables.
马如进 ;倪美娟 . 中间索面斜拉桥并列拉索尾流驰振数值研究[J]. , 2013, 32(10): 91-94.
MA Rujin NI Meijuan . Numerical simulation study on wake galloping of parallel cables of cable stayed bridge with central cable planes. , 2013, 32(10): 91-94.
2013, Vol. 32 
