124 波と流れの共存場におけるArticulated Columnの渦励振について

抄録

Flow-induced vibration of articulated column in wave-current coexisting fields has been investigated experimentally. The experiments were carried out on concerning the cylinder supported by spring where the reduced velocity varied from 1 to 5. This paper presents the measurement of the response of flow-induced vibration, observation of flow fields and lift force acting on cylinder in harmonic flow. The flow visualization of the water surface was made using the bead of firing styrene whose diameter is 2-3mm. It concludes from the experiment result concerning the articulated column in wave-current coexisting fields that it vibrates greatly in the right-angle direction of the flow with twice the period of incident wave.