During operation, wind turbine blades are subjected to varying loads, making them vulnerable, reducing performance, and increasing mechanical failures. Furthermore, blade maintenance is both time-consuming and costly. Optical methods, such as DIC, are attractive to measure deformations on this kind of structures because they do not require electrical wiring, they avoid mass loading effects, and they can be easily configured to measure large test articles. In this paper, a novel optical technique based on DIC is described for performing full-field measurements by using contact-less techniques. In this paper, the possibility of using low speed cameras DIC to perform modal analysis and to validate and update finite element models is investigated, testing a scaled wind turbine blade in different conditions. The results obtained with DIC are compared with the ones obtained with accelerometers and correlated with the numerical solutions.
|Title of host publication||Rotating Machinery, Optical Methods and Scanning LDV Methods, Volume 6 - Proceedings of the 40th IMAC, A Conference and Exposition on Structural Dynamics, 2022|
|Editors||Dario Di Maio, Javad Baqersad|
|Number of pages||12|
|Publication status||Published - 2023|
|Name||Conference Proceedings of the Society for Experimental Mechanics Series|
Bibliographical noteFunding Information:
The authors gratefully acknowledges the Flanders Innovation & Entrepreneurship for its support of the Baekeland project “Digital Image Correlation For Structural Dynamics Full-field Analysis”, [nr. HBC.2019.2595].
© 2023, The Society for Experimental Mechanics, Inc.
Copyright 2022 Elsevier B.V., All rights reserved.
- Digital image correlation
- Full-field deformations
- Optical methods
- Image processing