Article (Scientific journals)
Localization and quantification of damage in beam-like structures using sensitivities of principal component analysis results
Nguyen, Viet Ha; Golinval, Jean-Claude
2010In Mechanical Systems and Signal Processing, 24 (6), p. 1831-1843
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Keywords :
Sensitivity analysis; Damage localization; Parameter evaluation; Principal component analysis; Frequency response function; Model updating
Abstract :
[en] Principal component analysis (PCA) is known as an efficient method for dynamic system identification and diagnosis. This paper addresses a damage diagnosis method based on sensitivities of PCA in the frequency domain for linear-form structures. The aim is not only to detect the presence of damage, but also to localize and to evaluate it. The Frequency response functions measured at different locations on the beam are considered as data for the PCA process. Sensitivities of principal components obtained from PCA to beam parameters are computed and inspected according to the location of sensors; their variation from the healthy state to the damaged state indicates damage locations. The damage can be evaluated next providing that a structural model is available; this evaluation is based on a model updating procedure. It is worth noting that the diagnosis process does not require a modal identification achievement. Both numerical and experimental examples are used for better illustration.
Disciplines :
Mechanical engineering
Author, co-author :
Nguyen, Viet Ha ;  Université de Liège - ULiège > Doct. sc. ingé. (aérosp. & méca. - Bologne)
Golinval, Jean-Claude  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Language :
English
Title :
Localization and quantification of damage in beam-like structures using sensitivities of principal component analysis results
Publication date :
August 2010
Journal title :
Mechanical Systems and Signal Processing
ISSN :
0888-3270
eISSN :
1096-1216
Publisher :
Elsevier, London, United Kingdom
Volume :
24
Issue :
6
Pages :
1831-1843
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 June 2010

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