高レイノルズ数における２次元円柱の流れ方向と流れ直交方向の振動解析

抄録

The phenomenon which a cylindrical structure vibrates in a direction perpendicular to the wind flow when the wind velocity is fast is called vortex excitation. This is a vibration that occurs due to the mutual interference between the periodic vortices generated behind the cylinder and the vibration of the cylinder itself, and it is necessary to estimate the amplitudes of the displacements from the viewpoint of wind safety and maintenance of the structure . In this study, it is aimed to capture the hydrodynamic force characteristics and the hydrodynamic oscillation of the cylinder at the Reynolds number of the critical region where the Reynolds number drops sharply. The reduced speed U_r is set to 2 to 15.