Aeroelastic instability of rectangular cylinders in a torsional mode due to a transverse wind

This paper reports results of wind tunnel experiments on the aeroelastic instability in a torsional mode of two-dimensional rectangular cylinders in a uniform, transverse, two-dimensional flow. Both the free oscillation method and the forced oscillation method were employed for the experiments. Emphasis has been placed on finding the effect of the chord to thickness ratio $\text{c}\text{d}$, and also that of the structural damping, on the aeroelastic instability phenomena in the vicinity of the resonance speed.