Tuned liquid column dampers for mitigation of edgewise vibrations in rotating wind turbine blades

摘要: SUMMARY Edgewise vibrations in wind turbine blades are lightly damped, and large amplitude induced by the turbulence may significantly shorten fatigue life of blade. This paper investigates performance tuned liquid column dampers (TLCDs) for mitigating edgewise rotating blades. Normally, centrifugal acceleration at outboard portion a blade can reach to magnitude 7–8 g, which makes it possible use TLCD with very small mass suppressing effectively. The parameters be optimized mounting position, ratio, geometries, head loss coefficient damper. Based on reduced 2-DOF nonlinear model developed authors, optimization these carried out minimizing standard deviation tip displacement, consideration both space limitation inside constraint motion. modal load has been calculated from more sophisticated 13-DOF aeroelastic model, includes coupling blade-tower-drivetrain vibration aerodynamic damping presented different modes. Various intensities rotational speeds rotor have considered evaluate TLCD. Further, damper is incorporated into verify application decoupled optimization. investigation shows promising results Copyright © 2014 John Wiley & Sons, Ltd. Received 10 April 2014; Revised 14 June Accepted 29 July