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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2010-01-01
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Series: | Shock and Vibration |
Online Access: | http://dx.doi.org/10.3233/SAV-2010-0556 |
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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 |
work_keys_str_mv |
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