Numerical investigation of transverse galloping in turbulent flow

This paper attempts to model the complicated effects of incoming turbulence on the unsteady galloping instability of a rectangular cylinder, which arises due to the interference of vortex-induced vibration and quasi-steady galloping. As a first step, a purely quasi-steady nonlinear model is considered. Then, a modified version of the nonlinear wake-oscillator model proposed between the 70’s and the 80’s by Prof. Y. Tamura is considered. In both cases, turbulence is included in the model by synthetizing a random field of partially-correlated flow velocity fluctuations.