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Operational modal analysis of a large wind turbine

Journal Article


Abstract


  • Aiming at the vibration modes and its variation characteristics of a large wind turbine under static status and various rotational speeds, the variations of each mode caused by elastic deformation, inertia and gyroscopic effect and their effects on aeroelastic stability of the wind turbine system were studied. Considering the large wind turbine system's non-linear characteristics and time-varying characteristics caused by the rotational wind rotor, the linear eigenvalue problems of the wind turbine were analyzed by using the dynamics software ADAMS, based on the dynamics theory of multi-body system and the modeling methodology of hybrid multi-body system (HMBS). A stiff integral method was then employed to solve the non-linear control equations of the system numerically considering the elastic deformation of flexible components and the rotation of the wind rotor. The operational modal identification was performed through Fourier spectral analysis. The variations of the system's first ten modes and their influence factors were discussed and analyzed in detail. The results can be used as aeroelastic stability criteria, which offer an effective solution and analysis method to avoid resonance and improve operating efficiency of the wind turbine system.

Publication Date


  • 2016

Citation


  • Zhong, C. T., Li, D. Y., Wang, X. N., Mo, W. W., & Liu, X. (2016). Operational modal analysis of a large wind turbine. Zhendong yu Chongji/Journal of Vibration and Shock, 35(6). doi:10.13465/j.cnki.jvs.2016.06.022

Scopus Eid


  • 2-s2.0-84964056566

Web Of Science Accession Number


Volume


  • 35

Issue


  • 6

Abstract


  • Aiming at the vibration modes and its variation characteristics of a large wind turbine under static status and various rotational speeds, the variations of each mode caused by elastic deformation, inertia and gyroscopic effect and their effects on aeroelastic stability of the wind turbine system were studied. Considering the large wind turbine system's non-linear characteristics and time-varying characteristics caused by the rotational wind rotor, the linear eigenvalue problems of the wind turbine were analyzed by using the dynamics software ADAMS, based on the dynamics theory of multi-body system and the modeling methodology of hybrid multi-body system (HMBS). A stiff integral method was then employed to solve the non-linear control equations of the system numerically considering the elastic deformation of flexible components and the rotation of the wind rotor. The operational modal identification was performed through Fourier spectral analysis. The variations of the system's first ten modes and their influence factors were discussed and analyzed in detail. The results can be used as aeroelastic stability criteria, which offer an effective solution and analysis method to avoid resonance and improve operating efficiency of the wind turbine system.

Publication Date


  • 2016

Citation


  • Zhong, C. T., Li, D. Y., Wang, X. N., Mo, W. W., & Liu, X. (2016). Operational modal analysis of a large wind turbine. Zhendong yu Chongji/Journal of Vibration and Shock, 35(6). doi:10.13465/j.cnki.jvs.2016.06.022

Scopus Eid


  • 2-s2.0-84964056566

Web Of Science Accession Number


Volume


  • 35

Issue


  • 6