Low-Cost Tower Root Fatigue Load Estimation for Structural Health Monitoring of Grouted Connections in Offshore Wind Turbines

Nevena Perisic, Poul Henning Kirkegaard

Publikation: Bidrag til tidsskriftKonferenceartikel i tidsskriftForskningpeer review

5 Citationer (Scopus)

Abstrakt

The sinking of wind turbines (WTs) with monopile foundations is one of the major issues in the offshore wind industry nowadays. Dynamic wind and wave loads act on the WTs causing vibrations of the structure. However, grouted connections in the monopiled WTs are not designed well enough to transfer bending moments from the wind loading. When the load capacity of the grouted connection is reached, stress cracks appear in the grout causing transition piece to slide down.
Direct measuring of the fatigue load, called the tower bending moment, causing fatigue failures and sinking of the WTs is expensive and practically unfeasible. This paper suggests a low-cost, modelbased algorithm for indirect measuring of the tower bending moments from the WT dynamic response measurements. The bending moment is estimated recursively using well-known Kalman filter theory.
The method is validated using WT simulated data, assuming different measurement noise levels.
OriginalsprogEngelsk
TidsskriftKey Engineering Materials
Vol/bind569-570
Sider (fra-til)676-683
Antal sider8
ISSN1013-9826
DOI
StatusUdgivet - 2013
Begivenhed10th International Conference on Damage Assessment of Structures - Dublin, Irland
Varighed: 8 jul. 201310 jul. 2013
Konferencens nummer: 10
https://www.damas2013.org/

Konference

Konference10th International Conference on Damage Assessment of Structures
Nummer10
Land/OmrådeIrland
ByDublin
Periode08/07/201310/07/2013
Internetadresse

Emneord

  • Grouted Connection Problem
  • Tower Bending Moment
  • Load Estimations
  • Kalman Filter

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