Reference : Comparison of different excitationand data sampling-methods in structural health moni...

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Civil engineering Engineering, computing & technology : Mechanical engineering
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/39281

Title :	Comparison of different excitationand data sampling-methods in structural health monitoring
Language :	English
Author, co-author :	Maas, Stefan [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Nguyen, Viet Ha [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Kebig, Tanja [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Schommer, Sebastian [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Zürber, Arno []
Publication date :	Mar-2019
Journal title :	Civil Engineering Design
Volume :	1
Pages :	10-16
Peer reviewed :	Yes
Audience :	International
Keywords :	[en] ambient excitation ; dynamic damage indicators ; structural health monitoring ; forced excitation ; modal analysis
Abstract :	[en] Structural Health Monitoring with analysis of dynamic characteristics intends to detect stiffness changes caused by damage. It can be performed by vibrational tests resulting to modal parameters, that is, eigenfrequencies, damping, modeshapes, or modal masses. Those parameters are themselves informational and even allow often deducing the stiffness matrix. Based on that, it is possible to identify and to localize changes in the stiffness matrix due to damage, that is, localization and quantification of damage. However, changing test conditions, like ambient temperature or excitation force or existing nonlinearities of concrete, show important influence on damage indicators and hence need compensation prior to damage detection. Considering this background, this article focuses on comparing ambient excitation to forced excitation including appropriate exciters. Furthermore, continuous monitoring is discussed vs discrete testing in distinct time-intervals. The intention of the comparison is to give an overview, that is, helpful for choosing appropriate measurement technique for the sake of correct damage detection subsequently.
Permalink :	http://hdl.handle.net/10993/39281
DOI :	10.1002/cend.201800002

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