TY - GEN
T1 - Monitoring of wind turbine structures using stationary sensors and short-term optical techniques
AU - Botz, Max
AU - Raith, Manuel
AU - Emiroglu, Altug
AU - Grosse, Christian U.
N1 - Funding Information:
The authors would like to thank the German Federal Ministry for Economic Affairs and Energy for funding the MISTRALWIND-project under grant number 0325795, project partners Max Bögl AG and Siemens for providing access to the test wind turbine and graduate students Georg Harhaus and Yifang Zhang for their help regarding measurement data preprocessing and Operational Modal Analysis.
PY - 2017
Y1 - 2017
N2 - This research deals with monitoring of a large onshore wind turbine (3 MW, 142.5 m hub height) with a hybrid (steel/concrete) tower design. The structural dynamics of the tower are monitored by stationary sensors installed inside the tower and short-term optical techniques. The insights are used to calibrate a detailed finite element model of the tower. Combining measurement data and a finite element model, the overall objective of the project can be reached, which is to detect defects and fatigue and to estimate the remaining service-life of the wind turbine support structure. Modal parameters of the structure including uncertainties were obtained by operational modal analysis of 244 10-min. vibration monitoring datasets. The resulting first and second order bending eigenfrequencies (0.27 Hz and 1.17 Hz) were deployed for validating and improving a finite element model by adding initial displacement stiffness. Besides validation using modal parameters a comparison of the structural response from field measurements and FE model is scheduled. Therefore tower displacement is determined from acceleration and digital image correlation of video data. Test measurements at the full-size test wind turbine were carried out providing coinciding displacement values.
AB - This research deals with monitoring of a large onshore wind turbine (3 MW, 142.5 m hub height) with a hybrid (steel/concrete) tower design. The structural dynamics of the tower are monitored by stationary sensors installed inside the tower and short-term optical techniques. The insights are used to calibrate a detailed finite element model of the tower. Combining measurement data and a finite element model, the overall objective of the project can be reached, which is to detect defects and fatigue and to estimate the remaining service-life of the wind turbine support structure. Modal parameters of the structure including uncertainties were obtained by operational modal analysis of 244 10-min. vibration monitoring datasets. The resulting first and second order bending eigenfrequencies (0.27 Hz and 1.17 Hz) were deployed for validating and improving a finite element model by adding initial displacement stiffness. Besides validation using modal parameters a comparison of the structural response from field measurements and FE model is scheduled. Therefore tower displacement is determined from acceleration and digital image correlation of video data. Test measurements at the full-size test wind turbine were carried out providing coinciding displacement values.
UR - http://www.scopus.com/inward/record.url?scp=85032364863&partnerID=8YFLogxK
U2 - 10.12783/shm2017/14150
DO - 10.12783/shm2017/14150
M3 - Conference contribution
AN - SCOPUS:85032364863
T3 - Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
SP - 2514
EP - 2521
BT - Structural Health Monitoring 2017
A2 - Chang, Fu-Kuo
A2 - Kopsaftopoulos, Fotis
PB - DEStech Publications
T2 - 11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017
Y2 - 12 September 2017 through 14 September 2017
ER -