Application of Hybrid Mass Damper in Vibration Suppression of Floating Offshore Wind Turbine

doi:10.3901/JME.2022.08.250

Abstract

Abstract: The tremendous wind-wave excitations bring about structural vibrations on floating offshore wind turbines(FOWTs). A hybrid mass damper(HMD) active control system is used to reduce the structural vibrations of FOWTs. The aero-hydro-structure-tuned mass damper(TMD)-HMD coupling dynamic model of the spar FOWTs is established based on Lagrange's equations. Subsequently, the stiffness and damping coefficients of TMD are optimized using genetic algorithm. A variable-gain state feedback H∞ controller is designed with the active control force acting on the nacelle TMD, and the solution of the controller is transformed into the optimization problem of linear matrix inequalities to obtain the optimal active control force. Finally, the vibration reduction effects on spar FOWTs are studied employing HMD control system in different load cases. Results demonstrate that the HMD active control system could further reduce the platform pitch(PFPI) movement and the tower top fore-aft (TTFA) deflection relative to the TMD passive control system.

Key words: floating offshore wind turbine, vibration responses, active control, TMD, HMD

CLC Number:

O328

YANG Jiajia, HE Erming, CHEN Pengxiang, SHU Juncheng. Application of Hybrid Mass Damper in Vibration Suppression of Floating Offshore Wind Turbine[J]. Journal of Mechanical Engineering, 2022, 58(8): 250-257.

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