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Efficacy of modal curvature damage detection in various pre-damage data assumptions and modal identification techniques
Abstract
The efficacy of modal curvature approach for damage localization is discussed in the paper in the context of input data. Three modal identification methods, i.e., Eigensystem Realization Algorithm (ERA), Natural Excitation Technique with ERA (NExT-ERA) and Covariance Driven Stochastic Subspace Identification (SSI-Cov), and four methods of determining baseline data, i.e., real measurement of the undamaged state, analytical function, Finite Element (FE) model and approximation of current experimental mode shape, are considered. Practical conclusions are formulated based on analysis of two cases. The first is a laboratory beam with a notch and the second is a stone masonry historic lighthouse with modern restoration in its upper part. The analysis shows that NExT-ERA and SSI-Cov in combination with approximation of current mode shape provide high efficacy in damage localization alongside relatively straightforward determination of baseline data. It proves that the construction of advanced FE models of a structure can be replaced with a much simpler method of baseline data acquisition. Furthermore, the research shows the structural mode shapes identified with ERA may not always indicate the presence of damage.
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/bpasts.2024.152217
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- Category:
- Articles
- Type:
- artykuły w czasopismach dostępnych w wersji elektronicznej [także online]
- Published in:
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Bulletin of the Polish Academy of Sciences-Technical Sciences
pages 152217 - 152217,
ISSN: 0239-7528 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Drozdowska M., Szafrański M., Szafrańska A., Tomaszewska A., Efficacy of modal curvature damage detection in various pre-damage data assumptions and modal identification techniques, Bulletin of the Polish Academy of Sciences-Technical Sciences, 2024,10.24425/bpasts.2024.152217
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/bpasts.2024.152217
- Sources of funding:
-
- Nr decyzji DEC-2/2023/IDUB/I.2/C Nr projektu 036982 Nazwa projektu: XXIX KONFERENCJA PT> LEKKIE KONSTRUKCJE W INŻYNIERII LĄDOWEJ LSCE
- Statutory activity/subsidy
- Verified by:
- Gdańsk University of Technology
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