Damage Localization Based on Power Spectral Density Analysis

Fang, Sheng; Perera, Ricardo; Huerta, Maria Consuelo

doi:10.4028/0-87849-444-8.589

Cited by 2 publications

(2 citation statements)

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“…The experimental data of I‐40 bridge in Albuquerque was then employed to test this method. Fang et al constructed a localization index to detect multi‐damage in beam‐like structure using the standard deviations of structural power spectral densities under random excitation. The identified result appears to be sensitive to the damage in noise free environment.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study of Multi-damage Detection in a Plate Based on Non-modal Method

2012

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Many published damage localization indices require structural modal identification and mathematical model of the undamaged structure. However, it is somewhat inconvenient for use in practical engineering. In this study, an efficient localization index has been presented, named as image flexibility of frequency response function, for damage detection in plate‐like structures. In order to avoid the finite element model error, two‐dimensional gapped smoothing method is employed without the need for the baseline data from a presumably undamaged structure. To assess the effectiveness of the proposed scheme, experimental studies on a multi‐damage steel plate are carried out. Meanwhile, the effects of damage magnitude and boundary condition on detection results are also discussed. The results show the effectiveness and robustness of the non‐modal method compared to those found in the literature.

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Section: Introductionmentioning

confidence: 99%

“…Two extend parameters named power mode shape curvature (PMSC) and power flexibility (PF) were derived to improve the possible anti‐noise ability of the method in Ref. . Remarkably, as a combination of statistical and modal properties, PF presents a good performance and accurately locates the multi‐damage with measurement noise.…”

Section: Introductionmentioning

confidence: 99%