Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36099
DC FieldValueLanguage
dc.contributorDepartment of Mechanical Engineering-
dc.creatorXu, H-
dc.creatorSu, ZQ-
dc.creatorCheng, L-
dc.creatorGuyader, JL-
dc.date.accessioned2016-04-15T08:36:27Z-
dc.date.available2016-04-15T08:36:27Z-
dc.identifier.issn0022-460X-
dc.identifier.urihttp://hdl.handle.net/10397/36099-
dc.language.isoenen_US
dc.publisherAcademic Pressen_US
dc.titleA "Pseudo-excitation" approach for structural damage identification : from "Strong" to "Weak" modalityen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage181-
dc.identifier.epage198-
dc.identifier.volume337-
dc.identifier.doi10.1016/j.jsv.2014.10.035-
dcterms.abstractA damage characterization framework based on the "pseudo-excitation" (PE) approach has recently been established, aimed at quantitatively identifying damage in beam-, plate-, and shell-like structural components. However, it is envisaged that the effectiveness of the PE approach can be restricted in practical implementation, due to the involvement of high order derivatives of structural dynamic deflections, in which measurement noise and uncertainties can overwhelm the damage associated signal features upon mathematical differentiation. In this study, the PE approach was revamped by introducing the weighted integration, whereby the prerequisite of satisfying the local equilibrium conditions was relaxed from "point-by-point" to "region-by-region". The revamped modality was thus colloquially referred to as "weak formulation" of the PE approach, as opposed to its original version which is contrastively termed as "strong formulation". By properly configuring a weight function, noise immunity of the PE approach was enhanced, giving rise to improved detection accuracy and precision even under noisy measurement conditions. Furthermore, the 'weak formulation' was extended to a series of coherent variants through partial integration, rendering a multitude of detection strategies by selecting measurement parameters and configurations. This endowed the PE approach with flexibility in experimental manipulability, so as to accommodate various detection requirements. As an application of the "weak formulation", a continuous gauss smoothing (CGS)-based detection scheme was developed, and validated by localizing multiple cracks in a beam structure, showing fairly improved noise tolerance.-
dcterms.bibliographicCitationJournal of sound and vibration, 2015, v. 337, p. 181-198-
dcterms.isPartOfJournal of sound and vibration-
dcterms.issued2015-
dc.identifier.isiWOS:000345634800011-
dc.identifier.scopus2-s2.0-84916613348-
dc.identifier.eissn1095-8568-
dc.identifier.rosgroupid2014002103-
dc.description.ros2014-2015 > Academic research: refereed > Publication in refereed journal-
Appears in Collections:Journal/Magazine Article
Access
View full-text via PolyU eLinks SFX Query
Show simple item record

SCOPUSTM   
Citations

14
Last Week
0
Last month
Citations as of Sep 8, 2020

WEB OF SCIENCETM
Citations

14
Last Week
0
Last month
Citations as of Oct 20, 2020

Page view(s)

143
Last Week
4
Last month
Citations as of Oct 19, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.