ScholarWorks@경상국립대학교

초록

Vortex-induced vibration (VIV) is a critical factor that governs the fatigue performance and long-term structural integrity of submarine power cables exposed to ocean currents. As offshore energy infrastructure continues to expand into deeper waters and more dynamic marine environments, a reliable understanding of vortex shedding characteristics and the associated VIV behavior under realistic tidal conditions has become increasingly important. In this study, a numerical investigation was conducted to analyze the vortex features and VIV behavior of structures subjected to varying flow conditions. The numerical methodology was validated through benchmark simulations of a steady flow past a circular cylinder at a Reynolds number of 40. The key vortex characteristics, including the recirculation zone length, vortex center locations, separation angle, and drag coefficient, were quantitatively compared with reference experimental and numerical data reported in the literature. Furthermore, the lift and drag coefficients, vortex shedding characteristics, and Strouhal frequencies were systematically evaluated over a range of Reynolds numbers. The results demonstrated that the proposed numerical approach accurately captures the essential hydrodynamic features governing vortex shedding and provides reliable predictions of VIV-related flow responses.

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