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Abstract

The degradation process of structural systems is usually due to a combination of reasons such as design or constructive problems, unexpected loading or even natural causes. Such deterioration process results in damaged regions whose main characteristics are localized stiffness decreases in the structure. In this article, the efficiency of a damage detection technique is analyzed through experimental tests and numerical simulations performed in a cantilever beam involving several damage scenarios. The methodology consists of two stages: (i) damage location — determined by means of the strain energy deviation between damaged and undamaged structural vibration modes; and (ii) damage quantification — developed through the analysis of measured natural frequencies of a damaged structure and its respective undamaged numerical model. In general, this two-step strategy shows good results although more robust results are obtained by using numerical data rather than by experimental data.

Keywords

damage identification dynamic analysis vibration data interpolation

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References

Alvandi A. and Cremona C. Assessment of vibration-based damage identification techniques. J Sound Vibr 2006; 292: 179-202.

Humar J. , Bagchi A. and Xu H. Performance of vibration-based techniques for the identification of structural damage. Struct Health Monit 2006 ; 5: 215-241.

Hu H. and Wang J. Damage detection of a woven fabric composite laminate using a modal strain energy method. Eng Struct 2009; 31: 1042-1055.

Barbosa FS , Borges CCH , and Cury AA A hybrid technique of damage assessment using experimental data and numerical modeling. In: Proceedings of the Third EVACES - Experimental Vibration Analysis in Civil Engineering Structures, Porto, Portugal, 2007.

Adewuyi AP , Wu Z. and Serker Nhmk. Assessment of vibration-based damage identification methods using displacement and distributed strain measurements. Struct Health Monit 2009; 8: 443-461.

Doebling SW , Farrar CR , Prime MB and Shevitz DW A summary review of damage identification methods that examine changes in dynamic properties. Shock Vibr Dig 1998 ; 30: 91-105.

Borges CCH , Barbosa HJC and Lemonge ACC. A structural damage identification method based on genetic algorithm and vibrational data. Int J Numer Meth Eng 2007; 69: 2663-2686.

Li H. , Fang H. and S-L Hu. Damage localization and severity estimate for three-dimensional frame structures . J Sound Vibr 2007; 301: 481-494.

Bayissa WL and Haritos N. Structural damage identification in plates using spectral strain energy analysis . J Sound Vibr 2007; 307: 226-249.

10.

Kumar M. , Shenoi RA and Cox SJ Experimental validation of modal strain energies based damage identification method for a composite sandwich beam. Compos Sci Tech 2009; 69: 1635-1643.

11.

Hu H. , Wang B. , Lee C. and Su J. Damage detection of surface cracks in composite laminates using modal analysis and strain energy method. Compos Struct 2006 ; 74: 399-405.

12.

Villela J. , Ribeiro HC , Guevara N. , Barbosa FS , and Barra LPS. Dental implants osseo-integration evaluation through dynamic analysis . In: Proceedings of the XXIV CILAMCE - Iberian Latin-American Congress on Numerical Method in Engineering, Ouro Preto, Brazil, 2003.

13.

Cornwell P. , Doebling SW , Farrar CR and Sohn H. Application of the strain energy damage detection method to plate-like structures . J Sound Vibr 1999; 224: 359-374.

14.

Chen H. and Bicanic N. Assessment of damage in continuum structures based on incomplete modal information . Comput Struct 2000; 74: 559-570.

15.

Asmussen J. Modal analysis based on the random decrement technique - application to civil engineering structures. PhD Thesis, Aalborg University/Danemark, 1998.

16.

Brincker R. , Krenk S. , and Jensen JL Estimation of correlation functions by the random decrement technique. In: Proceedings of the 9th International Modal Analysis Conference Part 1 (of 2), Florence, Italy, 15-18 April 1991, pp. 610-615.

17.

Ewins DJ Modal testing: theory, practice and application, 2nd ed. Hertfordshire: Research Studies Press, 2000.

18.

Zienkiewicz OC and Taylor RL The finite element method. Oxford: Butterworth-Hienemann, 2000 .

19.

Alvandi A. Contribution à l’utilisation pratique de l’evaluation dynamique pour la detection d’endommagements dans les ponts. PhD Thesis, Ecole National des Ponts et Chaussées , France, 2004.

20.

Hu S-LJ , Wang S. and Li H. Cross-modal strain energy method for estimating damage severity. J Eng Mech 2006; 132: 429-437.

A two-step technique for damage assessment using numerical and experimental vibration data

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