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Non-linear aeroelasticity: An approach to compute the response of three-blade large-scale horizontal-axis wind turbines

Author

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  • Gebhardt, C.G.
  • Roccia, B.A.

Abstract

In this work, we present an aeroelastic model intended for three-blade large-scale horizontal-axis wind turbines. This model results from the coupling of an existing aerodynamic model and a structural model based on a segregated formulation derived in an index-based notation that enables combining very different descriptions such as rigid-body dynamics, assumed-modes techniques and finite element methods. The developed structural model comprises a supporting tower, a nacelle, which contains the electrical generator, power electronics and control systems, a hub in which the blades are connected to a rotating shaft, and three blades, which extract energy from the wind. Flexible blades are discretized into beam finite elements and the flexible tower is discretized into assumed modes. The nacelle and hub are considered rigid. To illustrate the flexibility of the structural modeling, the tower, nacelle and hub are modeled as a single kinematic chain and each blade is modeled separately. To establish the blade-hub attachments, we use constraint equations. Thus, the resulting equations are differential algebraic. We also expose a general procedure for connecting the non-matching structural and aerodynamic meshes. Finally, we present results, some of them are validations, which prove that our new approach is reliable and does have capability to capture non-linear phenomena such as centrifugal stiffening, flutter and large yaw errors, and the remaining ones correspond to the aeroelastic response of a wind turbine during a start-up maneuvering.

Suggested Citation

  • Gebhardt, C.G. & Roccia, B.A., 2014. "Non-linear aeroelasticity: An approach to compute the response of three-blade large-scale horizontal-axis wind turbines," Renewable Energy, Elsevier, vol. 66(C), pages 495-514.
    • Handle: RePEc:eee:renene:v:66:y:2014:i:c:p:495-514
    DOI: 10.1016/j.renene.2013.12.040
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    References listed on IDEAS

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    1. Zhao, Xueyong & Maißer, Peter & Wu, Jingyan, 2007. "A new multibody modelling methodology for wind turbine structures using a cardanic joint beam element," Renewable Energy, Elsevier, vol. 32(3), pages 532-546.
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    Cited by:

    1. Ebrahimi, Abbas & Sekandari, Mahmood, 2018. "Transient response of the flexible blade of horizontal-axis wind turbines in wind gusts and rapid yaw changes," Energy, Elsevier, vol. 145(C), pages 261-275.
    2. Liu, Wenyi, 2016. "Design and kinetic analysis of wind turbine blade-hub-tower coupled system," Renewable Energy, Elsevier, vol. 94(C), pages 547-557.
    3. Shah, Owaisur Rahman & Tarfaoui, Mostapha, 2016. "The identification of structurally sensitive zones subject to failure in a wind turbine blade using nodal displacement based finite element sub-modeling," Renewable Energy, Elsevier, vol. 87(P1), pages 168-181.
    4. Nezamolmolki, Davoud & Shooshtari, Ahmad, 2016. "Investigation of nonlinear dynamic behavior of lattice structure wind turbines," Renewable Energy, Elsevier, vol. 97(C), pages 33-46.
    5. Xu, Jin & Zhang, Lei & Li, Xue & Li, Shuang & Yang, Ke, 2020. "A study of dynamic response of a wind turbine blade based on the multi-body dynamics method," Renewable Energy, Elsevier, vol. 155(C), pages 358-368.

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