An aeroelastic model for vortex-induced vibrating cylinders subject to frequency lock-in

This work presents a novel way to calculate the response amplitude of an elastically supported cylinder experiencing vortex-induced vibrations. The method couples a computational fluid dynamic (CFD) model of the shedding vortex flow to a structural model representation of the elastically supported cylinder. The aerodynamic forces on the cylinder are calculated using a harmonic balance, frequency domain solver. Three cases are considered: the cylinder vibrating transverse to the flow, in-line with the flow, and with both degrees of freedom. Two shedding patterns are observed, symmetric and antisymmetric, depending on the lock-in region considered. The in-line degree of freedom does not have a significant effect on the cylinder cross-flow response, except for very low mass or very low damping.

Duke Scholars

Author Jeffrey P. Thomas Thomas Lord Department of Mechanical Engineering and Materia ...

Author Robert Kielb Thomas Lord Department of Mechanical Engineering and Materia ...

Author Earl H. Dowell Thomas Lord Department of Mechanical Engineering and Materia ...