Crack detection on beams by time-frequency analysis of transient flexural waves

• Autorzy: Apostoloudi A. , Douka E. , Hadjileontiadis L. J. , Rekanos I. T. , Trochidis A.
• Języki publikacji: EN

Abstrakty

EN

A method for crack detection in beams by time-frequency analysis of flexural waves is described. Two different time-frequency representations, namely the continuous wavelet transform and the smoothed pseudo-Wigner distribution are employed. Simulated and measured exural waves in a cracked beam are analysed and both the location and size of the crack are accurately determined. The location of the crack is estimated using the arrival time of reflected waves with different group velocities. The ratio of the reflected wave energy to the incident wave one is calculated and used as an indicator of the crack size. Wave experiments in a slender brass beam are in good agreement with predictions verifying the effciency of the method. In view of the results obtained, the advantages and shortcomings of the time-frequency representations employed are presented and discussed.

Słowa kluczowe

EN

cracked beams; crack detection; wave propagation; time-frequency distributions; wavelets; Wigner distribution

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2007
• Tom: Vol. 32, No. 4
• Strony: 941--954
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Apostoloudi A.

• Aristotle University of Thessaloniki, Faculty of Engineering, Physics Division GR-54124, Thessaloniki, Greece

autor

Douka E.

• Aristotle University of Thessaloniki, Faculty of Engineering, Mechanics Division

autor

Hadjileontiadis L. J.

• Aristotle University of Thessaloniki, Faculty of Engineering Department of Electrical and Computer Engineering Division of Telecommunications

autor

Rekanos I. T.

• Aristotle University of Thessaloniki, Faculty of Engineering, Physics Division GR-54124, Thessaloniki, Greece

autor

Trochidis A.

• Aristotle University of Thessaloniki, Faculty of Engineering, Physics Division GR-54124, Thessaloniki, Greece

Bibliografia

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