Vibration control of coupled wind tower-nacelle-blade system
Palavras-chave:
Vibration control, tuned mass damper, inverted pendulum, dynamic instabilityResumo
In this work, the vibration control of a coupled wind tower – nacelle – blades system subjected to
external lateral loads and rotating blades is studied. To model the tower and blades, the non-linear Euler-Bernoulli
beam theory and the linear Euler-Bernoulli beam, respectively, are considered. The structural control device
studied is an inverted pendulum tuned mass damper (IPTMD) located at the top of the tower. The Rayleigh-Ritz
method, together with Hamilton principle, is applied to obtain a set of nonlinear ordinary differential equations of
motion which are, in turn, solved by the Runge-Kutta method. First, the dynamic instability is studied when
rotating blades are considered, where it is possible to observe veering phenomena. In addition, the optimum
parameters of the IPTMD are obtained. The results show a good performance achieved by the vibration control
adopted to the dynamical behavior.
