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Article: Statistical damage detection based on frequencies of sensitivity-enhanced structures

TitleStatistical damage detection based on frequencies of sensitivity-enhanced structures
Authors
KeywordsDamage detection
Feedback control
Frequency
Sensitivity-enhanced structures
Statistical analysis
Issue Date2008
PublisherWorld Scientific Publishing Co Pte Ltd. The Journal's web site is located at http://www.worldscinet.com/ijssd/ijssd.shtml
Citation
International Journal Of Structural Stability And Dynamics, 2008, v. 8 n. 2, p. 231-255 How to Cite?
AbstractA statistical method using frequencies of structures under control is proposed for detecting damage. In the study, feedback control based on independent modal space control is first used to assign the pole of the system under detection intentionally. Then the prescribed characteristic frequencies of the structure under control, which may be more sensitive to damage, are obtained and further employed to constitute a sensitivity-enhanced damage indicator (SEDI). The principle of sensitivity-enhancing feedback control for damage detection of multi-degree-of-freedom systems is elaborated. To overcome the effect of measurement noise on modal frequencies, a hypothesis test involving the t-test that utilizes the SEDI is employed to estimate the occurrence of damage, while a statistical pattern recognition method that uses the feature vectors including the SEDI is employed to locate damage. Based on the perturbation theory, the feature vectors are normalized in order to eliminate the effect of damage extent on damage localization. The proposed method is verified by examples including a three-span continuous beam with a single damaged element and the IASC-ASCE benchmark structure with a single damaged brace. Simulation results show that, by using the frequencies of the structures under control, the proposed damage indicators are more sensitive to damage and are capable of detecting and locating small damage of structures. © 2008 World Scientific Publishing Company.
Persistent Identifierhttp://hdl.handle.net/10722/70837
ISSN
2015 Impact Factor: 1.028
2015 SCImago Journal Rankings: 0.613
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, Zen_HK
dc.contributor.authorAu, FTKen_HK
dc.contributor.authorCheng, YSen_HK
dc.date.accessioned2010-09-06T06:26:34Z-
dc.date.available2010-09-06T06:26:34Z-
dc.date.issued2008en_HK
dc.identifier.citationInternational Journal Of Structural Stability And Dynamics, 2008, v. 8 n. 2, p. 231-255en_HK
dc.identifier.issn0219-4554en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70837-
dc.description.abstractA statistical method using frequencies of structures under control is proposed for detecting damage. In the study, feedback control based on independent modal space control is first used to assign the pole of the system under detection intentionally. Then the prescribed characteristic frequencies of the structure under control, which may be more sensitive to damage, are obtained and further employed to constitute a sensitivity-enhanced damage indicator (SEDI). The principle of sensitivity-enhancing feedback control for damage detection of multi-degree-of-freedom systems is elaborated. To overcome the effect of measurement noise on modal frequencies, a hypothesis test involving the t-test that utilizes the SEDI is employed to estimate the occurrence of damage, while a statistical pattern recognition method that uses the feature vectors including the SEDI is employed to locate damage. Based on the perturbation theory, the feature vectors are normalized in order to eliminate the effect of damage extent on damage localization. The proposed method is verified by examples including a three-span continuous beam with a single damaged element and the IASC-ASCE benchmark structure with a single damaged brace. Simulation results show that, by using the frequencies of the structures under control, the proposed damage indicators are more sensitive to damage and are capable of detecting and locating small damage of structures. © 2008 World Scientific Publishing Company.en_HK
dc.languageengen_HK
dc.publisherWorld Scientific Publishing Co Pte Ltd. The Journal's web site is located at http://www.worldscinet.com/ijssd/ijssd.shtmlen_HK
dc.relation.ispartofInternational Journal of Structural Stability and Dynamicsen_HK
dc.subjectDamage detectionen_HK
dc.subjectFeedback controlen_HK
dc.subjectFrequencyen_HK
dc.subjectSensitivity-enhanced structuresen_HK
dc.subjectStatistical analysisen_HK
dc.titleStatistical damage detection based on frequencies of sensitivity-enhanced structuresen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0219-4554&volume=8&issue=2&spage=231&epage=255&date=2008&atitle=Statistical+damage+detection+based+on+frequencies+of+sensitivity-enhanced+structuresen_HK
dc.identifier.emailAu, FTK:francis.au@hku.hken_HK
dc.identifier.authorityAu, FTK=rp00083en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1142/S0219455408002636en_HK
dc.identifier.scopuseid_2-s2.0-45849151335en_HK
dc.identifier.hkuros147282en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-45849151335&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume8en_HK
dc.identifier.issue2en_HK
dc.identifier.spage231en_HK
dc.identifier.epage255en_HK
dc.identifier.isiWOS:000257540400002-
dc.publisher.placeSingaporeen_HK
dc.identifier.scopusauthoridWang, Z=35323317000en_HK
dc.identifier.scopusauthoridAu, FTK=7005204072en_HK
dc.identifier.scopusauthoridCheng, YS=7404911293en_HK

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