1117 流れに垂直な方向に励振する円柱後流渦に関する研究

概要

論文の詳細を見る
In this paper, simulation and experimental observation of the lock-in phenomenon, i.e. the vortex shedding frequency is synchronized to the structure frequency, a feature of vortex-induced vibration in cross-flow is undertaken. Simulation was carried out by using the software Ansys. When the ratio between forcing frequency of the cylinder and the vortex shedding frequency from the stationary cylinder is 1/3,lock-in could be observed. While the cylinder is oscillated for 1 period, 6 vortices shedding are observed. This phenomenon means the vortex shedding frequency is synchronized to the cylinder forcing frequency. In the experimental test the vortex shedding frequency is synchronized to 3 times frequency of the forcing frequency. In visualization test, 6 vortices shedding are observed for a period of cylinder forcing frequency, which means lock-in is occurred.
社団法人日本機械学会の論文