Characteristics of fluctuating forces on an inclined stay cable
DU Xiao-qing1; GU Ming2
1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China；2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Abstract：With the help of a specially designed test set-up, a series of wind tunnel tests were carried out on an inclined and yawed cable model to obtain its fluctuating pressure distributions. The effects of Reynolds number and wind angles on the fluctuating forces of the cable model were investigated. The wind angles ranged from 0o to 45o, and the Reynolds numbers were 1.17×105 (at a subcritical regime) and 2.34×105 (at a critical regime). Furthermore, RMS (Root Mean Square) aerodynamic forces, power spectrums of fluctuating pressures and fluctuating forces were presented at several different wind angles. It is found that Strouhal number will decrease with increasing of the wind angle. Moreover, Characteristics of fluctuating pressures and fluctuating forces will change dramatically when the Reynolds number increasing from subcritical regime to critical regime.
2012, Vol. 31 
