Artículo
Wavelet and Lipschitz exponent based damage identification method for beams using mode shapes
Autor/es | Ma, Qiaoyu
Solís Muñiz, Mario Rodríguez Mariscal, José Daniel Galvín, Pedro |
Departamento | Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras |
Fecha de publicación | 2022 |
Fecha de depósito | 2022-12-01 |
Publicado en |
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Resumen | This paper presents a damage identification method for beam-type structures based on the wavelet analysis. The damage location is predicted by a Damage Locating Index (DLI) based on a combined identification of local maxima ... This paper presents a damage identification method for beam-type structures based on the wavelet analysis. The damage location is predicted by a Damage Locating Index (DLI) based on a combined identification of local maxima from the scalograms of mode shapes. A new Damage Severity Index (DSI) based on the Lipschitz exponent is formulated such that it is not dependent on the damage locations, boundary conditions, and mode order, as long as a high enough number of measuring points is considered. This study focuses on its application using relatively few measurement points and on the consistency of the DSI. Results from a beam with double-notch damage are analyzed. The results show that the method is applicable with a sparse measurement grid and the DSI Reference values from a static analysis can be referred for damage evaluation using modal displacements. The practical limits of the method are also discussed. |
Cita | Ma, Q., Solís Muñiz, M., Rodríguez Mariscal, J.D. y Galvín, P. (2022). Wavelet and Lipschitz exponent based damage identification method for beams using mode shapes. Measurement, 205. https://doi.org/10.1016/j.measurement.2022.112201. |
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