Beam-like damage detection methodology using wavelet damage ratio and additional roving mass
Early damage detection plays an essential role in the safe and satisfactory maintenance of structures. This work investigates techniques that use only damaged structure responses. A Timoshenko beam was modeled in finite element method, and an additional mass was applied along their length. Thus, a f...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2022-10-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | https://www.fracturae.com/index.php/fis/article/view/3670/3673 |
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| Summary: | Early damage detection plays an essential role in the safe and satisfactory maintenance of structures. This work investigates techniques that use only damaged structure responses. A Timoshenko beam was modeled in finite element method, and an additional mass was applied along their length. Thus, a frequency-shift curve is observed, and different damage identification techniques were used, such as the discrete wavelet transform and the derivatives of the frequency-shift curve. A new index called wavelet damage ratio (WDR) was defined as a metric to measure the damage levels. Damages were simulated like a mass discontinuity (mass damage). It was evaluated for different damage levels and positions. Numerical results showed that all proposed techniques are efficient for damage identification in Timoshenko beams with low computational cost and practical application |
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| ISSN: | 1971-8993 |