Experimental Study on Aaerodynamic Stability of Rainwind Induced Vibration of Stay Cables of Different Diameters

Abstract:

Rainwind induced vibration of cables is a type of vibration with large amplitude and low frequency. The phenomenon of rainwind induced vibration of cables of two different diameters is successfully reproduced under simulated raining condition through wind tunnel test. The effects of several main factors on the characteristics of rainwind vibration and spiraled wires countermeasure for mitigation of the vibration are investigated. The results indicate that the mechanism of vibrations with different reduced velocities is different. Vibration with high reduced velocity is more like a type of galloping, while vibration with low reduced velocity is more related to vortexinduced vibration.

Key words:cables; rainwind induced vibration; artificial rainfall test; spiraled wires