Experimental modal analysis; Load updating; Output only analysis; Response identification; Structural dynamics; System monitoring
Abstract :
[en] The objective of this paper is the definition and verification of an iterative procedure for the detailed monitoring of the dynamic response of a structural system based on the experimental modal model of the system on ground and a limited number of measurements in the operating condition. The method is formulated starting from a linear model, but it can be applied to weakly non-linear system, because of the iterative nature of the algorithm. It does not require the definition of a numerical model, but an experimental representation in the modal coordinates, achievable with a preliminary modal survey with an arbitrary large amount of experimental points. The proposed method is presented as well as its implementation and several numerical test cases in order to validate its formulation. Experimental analyses are performed on a uniform beam and on a full-scale aeronautical composite component with promising results.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Chierichetti, M.
Grappasonni, Chiara ; Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Coppotelli, G.
McColl, C.
Language :
English
Title :
A modal approach for dynamic response monitoring from experimental data
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