Active control of flow induced vibration by self-excited hinged plates

This study investigates the feasibility of utilizing hinged plates with act ively controlled lengths to suppress flaw induced vibrations in mechanical structures. A computer program is developed to evaluate the lengths of the plates for optimum suppression at any flow speed. An active control scheme is devised for implementing the length change. The results from a model tes t show that the measured suppressed amplitudes are in good agreement with t he predicted values. The cases of a deep water riser and galloping transmis sion line are considered for illustration.