We are pleased to announce that our paper 'Assessment of Vortex Induced Vibrations on wind turbines' has been published online. In this work we present an engineering approach to perform Vortex Induced Vibration (VIV) analysis of the entire (coupled) wind turbine configuration.
VIV is the aero-elastic instability a structure undergoes when the cross flow oscillating lift force, due to shedding of vortices, resonates with one of the system's natural frequencies. Severe VIV occur when the shed vortices form a coherent wake structure, which in wind turbines requires the rotor either locked or in idling mode. In this respect, VIV rarely take place during normal operation but may appear under parked/idling conditions or during maintenance and assembly.
The established framework applies to all low damped (rotor and tower) modeshapes that may suffer from VIV, including the 2nd tower modes of tall tower configurations with relatively low second tower frequency.
https://iopscience.iop.org/article/10.1088/1742-6596/2257/1/012011
VIV is the aero-elastic instability a structure undergoes when the cross flow oscillating lift force, due to shedding of vortices, resonates with one of the system's natural frequencies. Severe VIV occur when the shed vortices form a coherent wake structure, which in wind turbines requires the rotor either locked or in idling mode. In this respect, VIV rarely take place during normal operation but may appear under parked/idling conditions or during maintenance and assembly.
The established framework applies to all low damped (rotor and tower) modeshapes that may suffer from VIV, including the 2nd tower modes of tall tower configurations with relatively low second tower frequency.
https://iopscience.iop.org/article/10.1088/1742-6596/2257/1/012011
| manolas_2022_j._phys.__conf._ser._2257_012011.pdf |
