A semi-empirical fluid force model for vortex-induced vibration of an elastic structure
A new semi-empirical model is presented for the vortex-induced vibration of structures. The lift force on a structure is assumed to consist of two components. The first component is a non-linear force that has a polynomial dependence on the velocity of the structure. The second component is a harmonic force with the Strouhal frequency. Only the crossflow motion of the structure is considered. The model predictions are compared with experimental results available in literature to show good qualitative agreement.