Investigation on Classification of Wake-induced Vibrations of Parallel Cables and Vibration Control by Spiral protuberances

Abstract

In this study, wake-induced vibrations of parallel cables and vibration control by spiral protuberances were investigated. From free vibration tests and flutter analyses, the mechanisms of wake-induced vibrations are clarified. By comparing responses obtained from time history response analysis based on quasi-stationary aerodynamics and flutter analysis, the response characteristics of the wake-induced vibration are clarified. Furthermore, the vibration effect and the aerodynamic characteristics will be discussed using cable with spiral protuberances expected to be applied as countermeasure against wake vibration. It is clarified that wake-induced vibrations are related to Karman vortex.