Vibration-based damage detection in composite wingbox structures by HHT
| Autor: | H.G. Chen, J.S. Jiang, Y.J. Yan |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Signal processing
Engineering business.industry Noise (signal processing) Mechanical Engineering Structural system Aerospace Engineering Structural engineering Finite element method Hilbert–Huang transform Computer Science Applications Vibration Control and Systems Engineering Feature (computer vision) Signal Processing business Dynamic method Algorithm Civil and Structural Engineering |
| Zdroj: | Mechanical Systems and Signal Processing. 21:307-321 |
| ISSN: | 0888-3270 |
| Popis: | A dynamic-based damage detection method for large structural systems using the Hilbert–Huang transform (HHT) has been proposed in this article. The proposed method has been verified numerically by implementing the scheme on a model of wingbox. In the implementation process, the following steps have been identified as being important: (1) axis-symmetry signal extension methods in order to solve the end effect problem of empirical mode decomposition (EMD), (2) finite element modelling for the purpose of establishing the base line, (3) a feature index vector for structural damage detection. The obtained results show that the damage feature index vector is more sensitive to small damage. Finally, the effect of noise is considered. Examination of the results confirms that the proposed damage detection method is very robust. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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