Characteristics of fluctuating forces on inclined stay cable

With the help of a specially designed test set-up,a series of wind tunnel tests were carried out on an inclined and yawing cable model to obtain its fluctuating pressure distributions.The effects of Reynolds number and wind angle on fluctuating forces of the cable model were investigated.In tests,the wind angle ranges from 0° to 45°,and the Reynolds number tates 1.17×105(at a subcritical regime) or 2.34×105(at a critical regime).Furthermore,RMS(root mean square) of aerodynamic forces and power spectrums of fluctuating pressures and fluctuating forces were presented at several different wind angles.It is found that Strouhal number will decrease with the increase of wind angle.Moreover,characteristics of fluctuating pressures and fluctuating forces will change dramatically when the Reynolds number increases from subcritical regime to critical regime.