Long-term monitoring; Operational effects; Seismic fragility; Wind turbine; Change in modal parameters; Enhanced frequency domain decompositions; Multiple linear regression analysis; Non-linear finite element model; Operational conditions; Seismic fragility curves; Seismic performance assessment; Vibration-based monitoring; Civil and Structural Engineering; Safety, Risk, Reliability and Quality
Abstract :
[en] In this study, long-term vibration-based monitoring of a 900-kW onshore wind turbine is presented. Modal properties such as frequency, shape, and damping ratios were obtained using enhanced frequency domain decomposition method. Change in modal parameters due to environmental and operational conditions was determined. Modal parameters after cleansing such effects were obtained by multiple linear regression analyses. Then, finite element model of the wind turbine was developed including piles and soil springs; and updated using identified modal parameters. After all, seismic fragility curves of the structure with the limit state being local buckling were developed considering different levels of wind speed. Stress level at which local buckling occurs was determined by pushover analysis of the turbine using a nonlinear finite element model. In the context of this study, it was observed that identified modal values had significant scattering and level of wind speed significantly changed the seismic fragility curve of the wind turbine.
Disciplines :
Civil engineering
Author, co-author :
Soyoz, Serdar ; Department of Civil Engineering, Bogazici University, Istanbul, Turkey
Hanbay, Serap; Department of Civil Engineering, Bogazici University, Istanbul, Turkey
Bagirgan, Burak; Department of Civil Engineering, Bogazici University, Istanbul, Turkey
ERGUN, Ozgun ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) ; Department of Civil Engineering, Bogazici University, Istanbul, Turkey
External co-authors :
yes
Language :
English
Title :
Long-term vibration-based monitoring and seismic performance assessment of a wind turbine
Publication date :
February 2021
Journal title :
Journal of Civil Structural Health Monitoring
ISSN :
2190-5452
eISSN :
2190-5479
Publisher :
Springer Science and Business Media Deutschland GmbH
This study has been supported by TUBITAK, 215M805 scientific and technological research project. The authors would like to extend their sincerest thanks to TUBITAK for their support and to Prof. Emre Otay and Soner Melih Kural for their help to get SCADA data from the turbine.
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