Shock and Vibration

Shock and Vibration / 2010 / Article
Special Issue

International Conference on Structural Engineering Dynamics – ICEDyn 2009

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Volume 17 |Article ID 153273 | https://doi.org/10.3233/SAV-2010-0556

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, vol. 17, Article ID 153273, 25 pages, 2010. https://doi.org/10.3233/SAV-2010-0556

Structural Health Monitoring in Changing Operational Conditions Using Tranmissibility Measurements

Received18 Jun 2010
Accepted18 Jun 2010

Abstract

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.

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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