Selected problems of damage detection in internally supported plates using one-dimensional Discrete Wavelet Transform

• Autorzy: Guminiak M. , Knitter-Piątkowska A.

Identyfikatory

DOI

10.15632/jtam-pl.56.3.631

• Języki publikacji: EN

Abstrakty

EN

The paper is concerned with damage detection in plates while using the Discrete Wavelet Transform (DWT). Rectangular plate structures resting on a Winkler or elastic half-space type foundation, with free boundaries are examined. Plate bending is described and solved by the Boundary Element Method in a direct approach. Defects are introduced by additional edges forming slots in relation to the basic plate domain. Numerical investigation is conducted basing on signal analysis of the structural static response and by taking advantage of multi-resolution analysis (MRA) of the signal function which can be represented in a multi-scale manner. The obtained signal is decomposed with the use of Daubechies or Coiflet wavelet families. The white noise generator is used to model measurement inaccuracy which is an inevitable element of a real experiment. The efficiency of DWT of the contaminated signal in damage detection is studied.

Słowa kluczowe

EN

Kirchhoff plate; Boundary Element Method; discrete wavelet transform

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2018
• Tom: Vol. 56 nr 3
• Strony: 631--644
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Guminiak M.

• Poznan University of Technology, Poznań, Poland

autor

Knitter-Piątkowska A.

• Poznan University of Technology, Poznań, Poland

Bibliografia

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• 6. Guminiak M., 2016, Static and free vibration analysis of thin plates of the curved edges by the boundary element method considering an alternative formulation of boundary conditions, Engineering Transactions, 64, 1, 3-32
• 7. Knitter-Piatkowska A., Garbowski, T., 2013, Damage detection through wavelet transform and inverse analysis, VI International Conference on Adaptive Modelling and Simulation (ADMOS 2013), J. Moitinho de Almeida, P. Diez, C. Tiago, and N. Pares (Edit.), Barcelona, 389-400
• 8. Knitter-Piątkowska A., Guminiak M., Hloupis G., 2017, Crack identification in plates using 1-D discrete wavelet transform, Journal of Theoretical and Applied Mechanics, 55, 2, 481-496
• 9. Knitter-Piątkowska A., Guminiak M., Przychodzki M., 2014, Damage Detection in Truss Structure Being the Part of Historic Railway Viaduct Wavelet Transformation, T. Łodygowski, J. Rakowski and P. Litewka (Edit.), CRC Press/Balkema, Taylor and Francis Group
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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).