Localization of damage in beam-like structures applying time-frequency distributions to modal shapes of vibration

• Autorzy: Katunin A.

Warianty tytułu

PL

Lokalizacja uszkodzeń w strukturach typu belka z zastosowaniem dystrybucji czasowo-częstotliwościowych do postaci własnych drgań

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of computational studies on damage localization in beam-like structures based on an approach of application of selected time-frequency distributions to modal shapes of vibration. The studies were performed on the results of finite element analysis on determination of modal shapes of vibration of a composite beam. The damage detection and localization procedure was shown on several examples of time-frequency distributions with a discussion of their performance for structural damage detection and localization problems. Additional studies were performed for artificially noised modal shapes in order to investigate an applicability of the proposed approach in noisy conditions. It was shown that application of time-frequency distributions is the effective tool in structural damage detection and localization, and can be a good alternative to the well-known signal processing techniques applied in these problems.

PL

Artykuł przedstawia wyniki badań obliczeniowych dotyczących lokalizacji uszkodzeń w strukturach typu belka na podstawie podejścia opartym na zastosowaniu wybranych dystrybucji czasowo-częstotliwościowych do postaci własnych drgań. Badania były przeprowadzone na wynikach analizy metodą elementów skończonych dotyczącej wyznaczenia postaci drgań własnych belki kompozytowej. Procedura detekcji i lokalizacji uszkodzeń została pokazana na kilku przykładach dystrybucji czasowo-częstotliwościowych wraz z dyskusją w zakresie ich efektywności w zagadnieniach detekcji i lokalizacji uszkodzeń strukturalnych. Dodatkowe badania zostały przeprowadzone dla sztucznie zaszumionych postaci drgań własnych w celu zbadania stosowalności zaproponowanego podejścia w warunkach zaszumienia. Pokazano, że zastosowanie dystrybucji czasowo-częstotliwościowych jest efektywnym narzędziem przy detekcji i lokalizacji uszkodzeń strukturalnych oraz może stanowić dobrą alternatywę do szeroko znanych technik przetwarzania sygnałów stosowanych w tych zagadnieniach.

Słowa kluczowe

EN

structural damage localization; time-frequency distributions; signal processing; modal shapes of vibration

PL

lokalizacja uszkodzeń strukturalnych; dystrybucja czasowo-częstotliwościowa; przetwarzanie sygnałów; postacie własne drgań

• Wydawca: Polskie Towarzystwo Diagnostyki Technicznej
• Czasopismo: Diagnostyka
• Rocznik: 2016
• Tom: Vol. 17, No. 3
• Strony: 53--58
• Opis fizyczny: Bibliogr. 28 poz., rys.

Twórcy

autor

Katunin A.

• Institute of Fundamentals of Machinery Design, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland

Bibliografia

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