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Structural Integrity Monitoring by Vibration Measurements
Yan, Ai-Min; De Boe, Pascal; Golinval, Jean-Claude
2003
 

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Keywords :
Vibration Monitoring; Damage Detection
Abstract :
[en] This paper presents a comparative study on several approaches of structural dam-age diagnosis based on vibration meas-urements. Stochastic subspace identifica-tion method is used to identify modal pa-rameters and to generate a Kalman predic-tion model, which are taken as damage-sensitive features for structural damage detection. A statistical process control technique based on principal component analysis (PCA) is also presented. An im-provement and enhancement of PCA is proposed. It is assumed that without dam-ages, structural responses should remain approximately in a hyperplane defined by the principal directions of data. Damage localization is explored with these meth-ods. As only the measured output signals are needed, the methods are convenient for on-line monitoring. The efficiency and limitation of the proposed methods are illustrated by numerical and practical ap-plications.
Disciplines :
Mechanical engineering
Author, co-author :
Yan, Ai-Min;  Université de Liège - ULiège > LTAS - Vibrations et Identification des Structures
De Boe, Pascal;  Université de Liège - ULiège > LTAS - Vibrations et Identification des Structures
Golinval, Jean-Claude  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Language :
English
Title :
Structural Integrity Monitoring by Vibration Measurements
Publication date :
2003
Event name :
Fracture Mechanics 2003
Event place :
Shanghai, China
Event date :
August 2003
Audience :
International
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since 05 October 2009

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