スパイラル表面突起による並列ケーブルに発生するウェイク振動の制振効果に関する研究

抄録

In parallel circular cables arrangement, it is well known that wake-induced vibrations such as wake galloping (WG) and wake-induced flutter (WIF) are developed in downstream side cable by the action of the wake flow from upstream side cable. Due to strong exciting force of WG, the structural damping cannot completely suppress the vibrations, on the other hand, it is reported that the some surface configurations using helical wires can suppress the WG in the previous study. Besides, since the Karman vortex can be suppressed by the spiral protuberances on cable surface, the relationship between Karman vortex and wake-induced vibrations was investigated by using models with spiral protuberances. Furthermore, the vibration control of spiral protuberances was also investigated.