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Zili Zhang

Non-Linear Aeroelastic Stability of Wind Turbines

Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearchpeer-review

  • Zili Zhang
  • Mahdi Teimouri Sichani, Denmark
  • Jie Li, China
  • Jianbing Chen, China
  • Søren R.K. Nielsen, Denmark
As wind turbines increase in magnitude without a proportional increase in stiffness, the risk of dynamic instability is believed to increase. Wind turbines are time dependent systems due to the coupling between degrees of freedom defined in the fixed and moving frames of reference, which may trigger off internal resonances. Further, the rotational speed of the rotor is not constant due to the stochastic turbulence, which may also influence the stability. In this paper, a robust measure of the dynamic stability of wind turbines is suggested, which takes the collective blade pitch control and non-linear aero-elasticity into consideration. The stability of the wind turbine is determined by the maximum Lyapunov exponent of the system, which is operated directly on the non-linear state vector differential equations. Numerical examples show that this approach is promising for stability identification of the non-linear wind turbine system.
Original languageEnglish
Title of host publicationDamage Assesment of Strucure X : 10th International Conference on Damage Assessment of Structures (DAMAS 2013), July 8-10, 2013, Dublin, Ireland
EditorsBiswajit Basu
Number of pages8
Place of publicationSchweiz
PublisherTrans Tech Publications Ltd.
Publication year2013
ISBN (print)978-3-03785-796-0
ISBN (Electronic)978-3-03795-522-2
Publication statusPublished - 2013
Externally publishedYes
Event10th International Conference on Damage Assessment of Structures - Dublin, Ireland
Duration: 8 Jul 201310 Jul 2013
Conference number: 10


Conference10th International Conference on Damage Assessment of Structures
SeriesKey Engineering Materials

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