Vortex induced vibrations experiments with an elastically mounted cylinder in water

This paper deals with a new set of two-degrees of freedom Vortex Induced Vibrations (VIV) experiments, with a relatively low mass-damping, elastically mounted rigid cylinder, in water. An experimental apparatus has been designed. Such device is a displacement-force-acceleration transducer and enables one to gather a great deal of relevant information. Experiments have been carried out in the S. Paulo Research Technological Institute (IPT) Towing Tank, in a series of runs, which comprise crosswise, stream wise and coupled oscillations. Further interpretations of sub-harmonic resonance, coupling in-line and cross-flow vibrations are addressed.