Application of continuous wavelet transform in vibration based damage detection method for beams and plates
✍ Scribed by M. Rucka; K. Wilde
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 824 KB
- Volume
- 297
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
In this paper a method for estimating the damage location in beam and plate structures is presented. A Plexiglas cantilever beam and a steel plate with four fixed boundary conditions are tested experimentally. The estimated mode shapes of the beam are analysed by the one-dimensional continuous wavelet transform. The formulation of the two-dimensional continuous wavelet transform for plate damage detection is presented. The location of the damage is indicated by a peak in the spatial variation of the transformed response. Applications of Gaussian wavelet for one-dimensional problems and reverse biorthogonal wavelet for two-dimensional structures are presented. The proposed wavelet analysis can effectively identify the defect position without knowledge of neither the structure characteristics nor its mathematical model.