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

Nevena Perisic; Poul Henning Kirkegaard

doi:10.4028/www.scientific.net/KEM.569-570.676

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 journal › Conference article in Journal › Research › peer-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 language	English
Journal	Key Engineering Materials
Volume	569-570
Pages (from-to)	676-683
Number of pages	8
ISSN	1013-9826
DOIs	https://doi.org/10.4028/www.scientific.net/KEM.569-570.676
Publication status	Published - 2013
Event	10th International Conference on Damage Assessment of Structures - Dublin, Ireland Duration: 8 Jul 2013 → 10 Jul 2013 Conference number: 10 https://www.damas2013.org/

Conference

Conference	10th International Conference on Damage Assessment of Structures
Number	10
Country/Territory	Ireland
City	Dublin
Period	08/07/2013 → 10/07/2013
Internet address	https://www.damas2013.org/

Keywords

Grouted Connection Problem
Tower Bending Moment
Load Estimations
Kalman Filter

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@inproceedings{760d26a6b96c4bbfad791252aa956a74,

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

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.",

keywords = "Grouted Connection Problem, Tower Bending Moment, Load Estimations, Kalman Filter, Grouted Connection Problem, Tower Bending Moment, Load Estimations, Kalman Filter",

author = "Nevena Perisic and Kirkegaard, {Poul Henning}",

year = "2013",

doi = "10.4028/www.scientific.net/KEM.569-570.676",

language = "English",

volume = "569-570",

pages = "676--683",

journal = "Key Engineering Materials",

issn = "1013-9826",

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T1 - Low-Cost Tower Root Fatigue Load Estimation for Structural Health Monitoring of Grouted Connections in Offshore Wind Turbines

AU - Perisic, Nevena

AU - Kirkegaard, Poul Henning

N1 - Conference code: 10

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

KW - Grouted Connection Problem

KW - Tower Bending Moment

KW - Load Estimations

KW - Kalman Filter

KW - Grouted Connection Problem

KW - Tower Bending Moment

KW - Load Estimations

KW - Kalman Filter

U2 - 10.4028/www.scientific.net/KEM.569-570.676

DO - 10.4028/www.scientific.net/KEM.569-570.676

M3 - Conference article in Journal

SN - 1013-9826

VL - 569-570

SP - 676

EP - 683

JO - Key Engineering Materials

JF - Key Engineering Materials

T2 - 10th International Conference on Damage Assessment of Structures

Y2 - 8 July 2013 through 10 July 2013

ER -

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

Abstract

Conference

Keywords

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