A Multi-Scale Wavelet Finite Element Model for Damage Detection of Beams Under a Moving Load
Auteur(s): |
Wen-Yu He
Songye Zhu Zhi-Wei Chen |
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Médium: | article de revue |
Langue(s): | anglais |
Publié dans: | International Journal of Structural Stability and Dynamics, juin 2018, n. 6, v. 18 |
Page(s): | 1850078 |
DOI: | 10.1142/s0219455418500785 |
Abstrait: |
The resolution of structural finite element model (FEM) determines the computation cost and accuracy in dynamic analysis. This study proposes a novel wavelet finite element model (WFEM), which facilitates adaptive mesh refinement, for the dynamic analysis and damage detection of beam structures subjected to a moving load (ML). The multi-scale equations of motion for the beam under the ML are derived using the second-generation cubic Hermite multi-wavelets as the shape functions. Then an adaptive-scale analysis strategy is established, in which the scales of the wavelet beam elements are dynamically changed according to the ML position. The performance of the multi-scale WFEM is examined in both dynamic analysis and damage detection problems. It is demonstrated that the multi-scale WFEM with a similar number of degrees of freedom can achieve much higher accuracy than the traditional FEM. In particular, the multi-scale WFEM enables the detection of sub-element damage with a progressive model updating process. The advantage in computation efficiency and accuracy makes the proposed method a promising tool for multi-scale dynamic analysis or damage detection of structures. |
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sur cette fiche - Reference-ID
10352218 - Publié(e) le:
14.08.2019 - Modifié(e) le:
14.08.2019