Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements

This article uses frequency domain transmissibility functions for detecting and locating damage in operational conditions. In recent articles numerical and experimental examples were presented and the possibility to use the transmissibility concept for damage detection seemed quite promising. In the...

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Main Authors: Christof Devriendt, Flavio Presezniak, Gert De Sitter, Katy Vanbrabant, Tim De Troyer, Steve Vanlanduit, Patrick Guillaume
Format: Article
Language:English
Published: Hindawi Limited 2010-01-01
Series:Shock and Vibration
Online Access:http://dx.doi.org/10.3233/SAV-2010-0556
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spelling doaj-345451af6b304fbd97c3b55e7702fd5e2020-11-24T22:34:20ZengHindawi LimitedShock and Vibration1070-96221875-92032010-01-01174-565167510.3233/SAV-2010-0556Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility MeasurementsChristof Devriendt0Flavio Presezniak1Gert De Sitter2Katy Vanbrabant3Tim De Troyer4Steve Vanlanduit5Patrick Guillaume6Department of Mechanical Engineering, Acoustics and Vibration Research Group, Vrije Universiteit Brussel, Brussel, BelgiumDepartment of Mechanical Engineering, Acoustics and Vibration Research Group, Vrije Universiteit Brussel, Brussel, BelgiumDepartment of Mechanical Engineering, Acoustics and Vibration Research Group, Vrije Universiteit Brussel, Brussel, BelgiumDepartment of Mechanical Engineering, Acoustics and Vibration Research Group, Vrije Universiteit Brussel, Brussel, BelgiumDepartment of Mechanical Engineering, Acoustics and Vibration Research Group, Vrije Universiteit Brussel, Brussel, BelgiumDepartment of Mechanical Engineering, Acoustics and Vibration Research Group, Vrije Universiteit Brussel, Brussel, BelgiumDepartment of Mechanical Engineering, Acoustics and Vibration Research Group, Vrije Universiteit Brussel, Brussel, BelgiumThis article uses frequency domain transmissibility functions for detecting and locating damage in operational conditions. In recent articles numerical and experimental examples were presented and the possibility to use the transmissibility concept for damage detection seemed quite promising. In the work discussed so far, it was assumed that the operational conditions were constant, the structure was excited by a single input in a fixed location. Transmissibility functions, defined as a simple ratio between two measured responses, do depend on the amplitudes or locations of the operational forces. The current techniques fail in the case of changing operational conditions. A suitable operational damage detection method should however be able to detect damage in a very early stage even in the case of changing operational conditions. It will be demonstrated in this paper that, by using only a small frequency band around the resonance frequencies of the structure, the existing methods can still be used in a more robust way. The idea is based on the specific property that the transmissibility functions become independent of the loading condition in the system poles. A numerical and experimental validation will be given.http://dx.doi.org/10.3233/SAV-2010-0556
collection DOAJ
language English
format Article
sources DOAJ
author Christof Devriendt
Flavio Presezniak
Gert De Sitter
Katy Vanbrabant
Tim De Troyer
Steve Vanlanduit
Patrick Guillaume
spellingShingle Christof Devriendt
Flavio Presezniak
Gert De Sitter
Katy Vanbrabant
Tim De Troyer
Steve Vanlanduit
Patrick Guillaume
Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements
Shock and Vibration
author_facet Christof Devriendt
Flavio Presezniak
Gert De Sitter
Katy Vanbrabant
Tim De Troyer
Steve Vanlanduit
Patrick Guillaume
author_sort Christof Devriendt
title Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements
title_short Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements
title_full Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements
title_fullStr Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements
title_full_unstemmed Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements
title_sort structural health monitoring in changing operational conditions using tranmissibility measurements
publisher Hindawi Limited
series Shock and Vibration
issn 1070-9622
1875-9203
publishDate 2010-01-01
description This article uses frequency domain transmissibility functions for detecting and locating damage in operational conditions. In recent articles numerical and experimental examples were presented and the possibility to use the transmissibility concept for damage detection seemed quite promising. In the work discussed so far, it was assumed that the operational conditions were constant, the structure was excited by a single input in a fixed location. Transmissibility functions, defined as a simple ratio between two measured responses, do depend on the amplitudes or locations of the operational forces. The current techniques fail in the case of changing operational conditions. A suitable operational damage detection method should however be able to detect damage in a very early stage even in the case of changing operational conditions. It will be demonstrated in this paper that, by using only a small frequency band around the resonance frequencies of the structure, the existing methods can still be used in a more robust way. The idea is based on the specific property that the transmissibility functions become independent of the loading condition in the system poles. A numerical and experimental validation will be given.
url http://dx.doi.org/10.3233/SAV-2010-0556
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