Vortex Excited Vibrations

A short description of the phenomena of vortex shedding is presented. Strouhal numbers for different cross sections are presented for the calculation of the critical wind speed. The locking-in effect is explained which leads to the correlation consideration which is the basis of a mathematical model for the use in the practical engineering work. The application to cantilevered and simple supported structures is shown.The prediction of the vortex resonance amplitude is compared with full scale measurements and with two other mathematical models. The effect of aerodynamic devices is explained.