SHM System Based on Modal Filtration

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The modal filter has various applications, among the others for damage detection. It was shown, that a structural modification (e.g. drop of stiffness due to a crack) causes an appearance of peaks on the output of the modal filter. This peaks result from not perfect modal filtration due to system local structural changes. That makes it a great indicator for damage detection, which has fallowing advantages: low computational afford due to the data reduction, the structural health monitoring system based on it, is easy to automate. Furthermore the system is theoretically insensitive to environmental changes as temperature or humidity variation (global structural changes do not cause a drop of modal filtration accuracy). In the paper the practical implementation of the presented technique is shown. The developed structural health monitoring (SHM) system is described as well as results of its extensive simulation and laboratory testing. Finally the application of the system for the structural changes detection on the airplane parts is presented..

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Periodical:

Edited by:

Tadeusz Uhl

Pages:

289-297

Citation:

K. Mendrok et al., "SHM System Based on Modal Filtration", Key Engineering Materials, Vol. 518, pp. 289-297, 2012

Online since:

July 2012

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$38.00

[1] K. Mendrok, T. Uhl, Overview of Modal Model-based Damage Detection Methods, Proceedings of 2004 ISMA, Leuven, Belgium, (2004).

[2] S. W. Doebling, C. R. Farrar, M. B. Prime, A Summary Review of Vibration-Based Damage Identification Methods, The Shock and Vibration Digest, 30(2) (1998) 91–105.

DOI: https://doi.org/10.1177/058310249803000201

[3] P. Carden, P. Fanning, Vibration Based Condition Monitoring: A Review, Structural Health Monitoring 3(4) (2004) 355–377.

DOI: https://doi.org/10.1177/1475921704047500

[4] G. L. Slater, S. J. Shelley, Health monitoring of flexible structures using modal filter concepts, Proceeding of SPIE, 1917 (1993) 997–1008.

[5] W. Gawronski, J. Sawicki, Structural Damage Detection Using Modal Norms, Journal of Sound and Vibration, 229(1) (2000) 194–198.

DOI: https://doi.org/10.1006/jsvi.1999.2179

[6] El-Ouafi Bahlous S., Abdelghani M., Smaoui H. and El-Borgi S., Modal Filtering and Statistical Approach to Damage Detection and Diagnosis in Structures Using Ambient Vibrations Measurements, Journal of Vibration and Control, Vol 13, No 3, pp.281-308, (2007).

DOI: https://doi.org/10.1177/1077546307076287

[7] A. Deraemaeker, A. Preumont, Vibration-based Damage Detection Using Large Array Sensors and Spatial Filters, Mechanical Systems and Signal Processing, 20(7) (2006) 1615–1630.

DOI: https://doi.org/10.1016/j.ymssp.2005.02.010

[8] K. Mendrok, T. Uhl, The application of modal filters for damage detection, Smart Structures and Systems, 6(2) (2010) 115-133.

DOI: https://doi.org/10.12989/sss.2010.6.2.115

[9] P. Kurowski, K. Mendrok, T. Uhl, An application of operational modal analysis in modal filtering, Journal of Physics. Conference Series, 305 (2011) 012094-1–012094-10.

DOI: https://doi.org/10.1088/1742-6596/305/1/012094

[10] K. Mendrok, T. Uhl, Numerical tests of a damage detection procedure based on modal filtration, Proceedings of the 5th EWSHM 2010, Sorento, Italy (2010) 982–987.

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