TY - JOUR
T1 - Nonlinear aeroelastic characterization of wind turbine blades
AU - Bichiou, Y.
AU - Abdelkefi, A.
AU - Hajj, M. R.
N1 - Publisher Copyright:
© The Author(s) 2014.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - A nonlinear aeroelastic characterization of wind turbine blades is performed. A two-dimensional aerodynamic model based on the quasi-steady approximation is coupled with a plunging and pitching blade section. The governing nondimensional equations are derived. The normal form of the Hopf bifurcation is derived and used to characterize the behavior of the system. Using linear analysis, it is demonstrated that, as the blade radius and/or operating rotational speed are increased, wind turbine blades become more susceptible to flutter at freestream velocities that are close to the cut-out speed. The nonlinear analysis, based on the normal form of the Hopf bifurcation, shows that, depending on the nonlinear structural parameters and initial conditions, subcritical instability may take place which means that high limit-cycle oscillation amplitudes may take place at freestream velocities that are lower than the linear flutter speed.
AB - A nonlinear aeroelastic characterization of wind turbine blades is performed. A two-dimensional aerodynamic model based on the quasi-steady approximation is coupled with a plunging and pitching blade section. The governing nondimensional equations are derived. The normal form of the Hopf bifurcation is derived and used to characterize the behavior of the system. Using linear analysis, it is demonstrated that, as the blade radius and/or operating rotational speed are increased, wind turbine blades become more susceptible to flutter at freestream velocities that are close to the cut-out speed. The nonlinear analysis, based on the normal form of the Hopf bifurcation, shows that, depending on the nonlinear structural parameters and initial conditions, subcritical instability may take place which means that high limit-cycle oscillation amplitudes may take place at freestream velocities that are lower than the linear flutter speed.
KW - Hopf bifurcation
KW - Wind turbine blades
KW - flutter
KW - nonlinear dynamics
KW - normal form
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U2 - 10.1177/1077546314529986
DO - 10.1177/1077546314529986
M3 - Article
AN - SCOPUS:84954285344
SN - 1077-5463
VL - 22
SP - 621
EP - 631
JO - JVC/Journal of Vibration and Control
JF - JVC/Journal of Vibration and Control
IS - 3
ER -