Investigation of the Effect of Vortex-Induced Vibration on Cylindrical Members
Under Different Flow Conditions

fluid mechanics, with the relationship between the Strouhal
number (St) and the Reynolds number (Re) serving as a key
concept in describing vortex shedding phenomena. This
research focuses on studying the influence of vortex shedding
on the vibrations of a cylindrical structure with a 1-meter
diameter. A high-resolution, two-dimensional (2D) numerical
simulation was utilized to analyze flow conditions ranging from
laminar to turbulent regimes (Re = 2 1x10 to 5 3x10 ), capturing
vortex formation and frequency. The simulation results were
then calibrated and validated with existing empirical formulas
(Williamson, 1996; Norberg, 1994). Our findings show strong
agreement with previous research, highlighting crucial
parameters such as fluid density, viscosity, flow velocity,
cylinder diameter, and surface characteristics that affect vortex
shedding. Additionally, the vortex shedding frequency varies
directly with the Strouhal (St) and Reynolds (Re) numbers.
When compared with the natural frequencies of cylindrical
structures measuring 10–30 meters in height, it becomes
evident that certain conditions may induce vibration for
structures whose natural frequencies lie within the range
between 0.05 Hertz and 1.3 Hertz. These outcomes deepen
our understanding of unsteady flow phenomena and offer
valuable guidance for engineering designs aimed at reducing
vortex-induced effects and enhancing structural safety.