Efficacy of modal curvature damage detection in various pre-damage data assumptions and modal identification techniques

• Autorzy: Drozdowska Milena , Szafrański Marek , Szafrańska Anna , Tomaszewska Agnieszka

Identyfikatory

DOI

10.24425/bpasts.2024.152217

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

modal curvature based damage detection; stochastic subspace identification; eigensystem realization algorithm; masonry tower; natural excitation; ERA; natural excitation technique; NExT

PL

identyfikacja podprzestrzeni stochastycznej; wieża murowana; detekcja uszkodzeń; NExT; wzbudzanie; algorytm ERA

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2025
• Tom: Vol. 73, nr 1
• Strony: art. no. e152217
• Opis fizyczny: Bibliogr. 30 poz., rys., wykr.

Twórcy

autor

Drozdowska Milena

• Department of Structural Mechanics, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdansk, Poland

• https://orcid.org/0000-0002-1012-5638

autor

Szafrański Marek

• Department of Engineering Structures, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdansk, Poland

• https://orcid.org/0000-0001-5802-760X

autor

Szafrańska Anna

• Division of Differential Equations and Applications of Mathematics, Institute of Applied Mathematics Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdansk, Poland

• https://orcid.org/0000-0003-0049-6301

autor

Tomaszewska Agnieszka

• Department of Structural Mechanics, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdansk, Poland

• https://orcid.org/0000-0001-5680-7979

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).