DETECÇÃO DE DANOS EM VIGAS DE ALUMÍNIO USANDO O MÉTODO DAS CURVATURAS MODAIS
Abstract
The civil structures are sensitive to the deterioration even under normal conditions of use. Depending on the severity of the damages, the resistant capacity of the structure can be compromised. Thus, when there is doubt as to its integrity it is of utmost importance that damage detection be carried out as soon as possible. The objective of this research was to investigate the application of the mode shape curvature method in the damage detection of aluminum beams. It was found great difficulty to locate the defects using the original method proposed by Pandey et al. (1991). From the modal curvatures a Damage Index (ID) was calculated which was more sensitive and precise than the original method. It was concluded that the modal curvature method associated with ID calculation has the potential to damage detection in beams, but the need to sample signals in a wider frequency band was identified in order to identify a larger number of bending mode shapes and thus improve sensitivity in the location of defects.
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References
BRASILIANO, A.; DOZ, G. N.; BRITO, J. L. V. Avaliação de Danos em Estruturas por Intermédio das Características Dinâmicas. In: First South-American Congress on Computational Mechanics - III Brazilian Congress on Computational Mechanics - VII Argentine Congress on Computational Mechanics (MECOM 2002), Argentina. CD - Proceedings, 2002. p. 1893-1911, 2002.
CARREIRA, M. R. Avaliação da rigidez à flexão de toras de madeira por meio de vibração transversal. 2012. 385 p. Tese (Doutorado) – Escola de Engenharia de São Carlos, Universidade de São Paulo, São Carlos.
CHAURASIA, A.; PANIGRAHI, S. K.; PATEL, S.S. Damage Identificaltion of Reinforced Concrete Beam Using Modal Curvature Approach. Journal of Scientific & Industrial Research. Vol. 77, p. 337-341, 2018.
DAWARI, V.; VESMAWALA, G. Structural Damage Identification Using Modal Curvature Differences. Journal of Mechanical and Civil Engineering. Vol. 4, p. 33-38, 2013.
DEOKAR, A. V; WAKCHAURE, B. V. D. Experimental Investigation of Crack Detection in Cantilever Beam Using Natural Frequency as Basic Criterion. In: International Conference on Current Trends in Technology, 2011, Institute Of Technology, Nirma University. 6p.
ELSHAFEY, A. A.; MARZOUK, H.; HADDARA, M. R. Experimental Damage Identification Using Modified Mode Shape Difference. Journal of Marine Science and Application. Vol. 10, p. 150-155, 2011.
FARRAR, C. R.; WORDEN, K. An Introduction to Structural Health Monitoring. Philosophical Transactions of The Royal Society. Vol. 365, p. 303-315, 2007.
GENOVESE SOARES, M. E. Localização e quantificação de danos em estruturas por meio de suas características dinâmicas. 2000. 120 p. Dissertação de Mestrado. Universidade de Brasília. Faculdade de Tecnologia. Brasília.
GERE, J. M.; GOODNO, B. J. Mechanics of Materials. Cengage Learning. 7th Ed. 2009.
HAMZE, A.; GUEGUEN, P.; ROUX, P.; BAILLET, L. Comparative Study of Damage Identification Algorithms Applied to a Plexiglas Beam In: 15th International Conference on Experimental Mechanics (ICEM). 2012, Porto, Portugal, Anais, p. 22-27.
HE, K.; ZHU, W. D. Structural Damage Detection Using Changes in Natural Frequencies: Theory and Applications. Journal of Physics Conference Series (Online). Vol. 305(1), p.1-10, 2011.
HO, Y. K.; EWINS, D. J. On structural Damage Identification with Mode Shapes, In: Conference on System Identification and Structural Monitoring, 2000, Madri, Espanha. Anais, p. 677 – 686.
ISMAIL, Z.; ONG, Z. C. Honeycomb damage detection in a reinforced concrete beam using frequency mode shape regression. Measurement. Vol. 45(5), p. 950-959, 2012.
KHIEM, N. T. Damage Detection of beam by natural frequencies: general theory and procedure. Vietnam Journal of Mechanics. Vol. 28(2), p. 120 – 132, 2006.
OWOLABI, G. M.; SWAMIDAS, A.S.J.; SESHADRI, R. Crack detection in beams using changes in frequencies and amplitudes of frequency response functions. Journal of Sound and Vibration. Vol. 265, p. 1–22, 2003.
PANDEY, A. K.; BISWAS, M.; SAMMAN, M. M. Damage detection from changes in curvature mode shapes. Journal of Sound and Vibration. Vol. 145(2), p.321-332, 1991.
RAJU, G.; RAMESH, L. Crack Detection in Structural Beams by using Curvature Mode Shapes .IJIRST –International Journal for Innovative Research in Science & Technology. Vol. 3(2), p 282-289, 2016
RYTTER, A. Vibrational Based Inspection of Civil Engineering Structures.1993. 193p. Tese (Doutorado) - Department of Building Technology and Structural Engineering, Aalborg University. Aalborg.
SALAWU, O. S; WILLIANS, C. Damage Location Using Vibration Mode Shapes. In: 12th International Modal Analysis Conference, 1994, Honolulu, Hawaii. P. 933-939.
SALGADO, R.; AYALA, G.; CRUZ, P. J. S.; ZAMORA S. A. Performance of Damage Detection Methods used in Bridge Structures through Dynamic Tests in Steel Beams. American Journal of Civil Engineering. Vol. 2(2), p. 18-26, 2014.
SASMAL, S.; RAMANJANEYULU, K. Detection and Quantification of Structural Damage of a Beam-Like Structure Using Natural Frequencies. International Journal of Engineering. Vol. 1, p. 167-176, 2009.
SINOU, J. J. A review of damage detection and health monitoring of mechanical systems from changes in the measurement of linear and non-linear vibrations. In: Mechanical Vibrations: Measurement, Efects and Control, Nova Science Publishers, Inc. , 2009, p.643-702.
ZONTA, D. Structural damage detection and localization by using vibrational measurements. 2000. 158f. Tese (Doutorado em Mecânica das Estruturas) – Departamento de Engenharia, Universidade de Bolonha, Bolonha.
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