CONTROL OF WIND-INDUCED INSTABILITIES THROUGH APPLICATION OF NUTATION DAMPERS: A BRIEF OVERVIEW

Abstract Developments in the area of vibration suppression through application of nutation dampers are briefly reviewed. The focus is on industrial aerodynamics problems involving vortex-induced and galloping-type instabilities. Parameters affecting the damper performance are touched upon first. This is followed by a comment on approximate models aimed at predicting the damper's performance; as well as the system dynamics in the presence of energy dissipation. A sample of typical wind tunnel test results substantiate the damper's effectiveness. The nutation dampers have been successfully implemented in several real-life situations. Further evolution of the nutation damper is considered, which, according to the first phase of the tests, shows considerable promise.

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