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

Nevena Perisic, Poul Henning Kirkegaard

Research output: Contribution to journalConference article in JournalResearchpeer-review

5 Citations (Scopus)

Abstract

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.
Original languageEnglish
JournalKey Engineering Materials
Volume569-570
Pages (from-to)676-683
Number of pages8
ISSN1013-9826
DOIs
Publication statusPublished - 2013
Event10th International Conference on Damage Assessment of Structures - Dublin, Ireland
Duration: 8 Jul 201310 Jul 2013
Conference number: 10
https://www.damas2013.org/

Conference

Conference10th International Conference on Damage Assessment of Structures
Number10
Country/TerritoryIreland
CityDublin
Period08/07/201310/07/2013
Internet address

Keywords

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

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