A new index for damage identification in beam structures based on modal parameters

• Autorzy: Taghipour Reza , Nashta Mina Roodgar , Bozorgnasab Moshen , Mirgolbabaei Hessam

Identyfikatory

DOI

10.24425/ame.2021.138397

• Języki publikacji: EN

Abstrakty

EN

The structural damages can lead to structural failure if they are not identified at early stages. Different methods for detecting and locating the damages in structures have been always appealing to designers in the field. Due to direct relation between the stiffness, natural frequency, and mode shapes in the structure, the modal parameters could be used for the purpose of detecting and locating the damages in structures. In the current study, a new damage indicator named “DLI” is proposed, using the mode shapes and their derivatives. A finite element model of a beam is used, and the numerical model is validated against experimental data. The proposed index is investigated for two beams with different support conditions and the results are compared with those of two well-known indices – MSEBI and CDF. To show the capability and accuracy of the proposed index, the damages with low severity at various locations of the structures containing the elements near the supports were investigated. The results under noisy conditions are investigated by considering 3% and 5% noise on modal data. The results show a high level of accuracy of the proposed index for identifying the location of the damaged elements in beams.

Słowa kluczowe

EN

damage detection; beam; modal parameters; mechanical failure; cracks; finite element model

PL

wykrywanie uszkodzeń; belka; parametry modalne; uszkodzenie mechaniczne; pęknięcia; model elementów skończonych

• Wydawca: Komitet Budowy Maszyn PAN
• Czasopismo: Archive of Mechanical Engineering
• Rocznik: 2021
• Tom: LXVIII, nr 4
• Strony: 375--394
• Opis fizyczny: Bibliogr. 21 poz., rys., tab., wykr.

Twórcy

autor

Taghipour Reza

• Department of Civil Engineering, University of Mazandaran, Babolsar, Iran

autor

Nashta Mina Roodgar

• Department of Civil Engineering, University of Mazandaran, Babolsar, Iran

autor

Bozorgnasab Moshen

• Department of Civil Engineering, University of Mazandaran, Babolsar, Iran.

autor

Mirgolbabaei Hessam

• Department of Mechanical and Industrial Engineering, University of Minnesota Duluth, Duluth, Minnesota, United States of America

• https://orcid.org/0000-0002-2747-149X

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).