Abstract
The dynamic behavior of structures with breathing cracks forced by harmonic excitation is characterized by the appearance of sub and super-harmonics in the response even in presence of cracks with small depth. Since the amplitude of these harmonics depends on the position and the depth of the crack, an identification technique is developed based on such a dependency. The main advantage of the proposed method relies on the use of different modes of the structure, each sensitive to the damage position in its peculiar way. In this paper the identification is tested against structure of increasing complexity to evaluate the applicability of the method to engineering applications. In particular, a robustness analysis is carried out for each test case to assess the influence of measuring noise on the damage identification.
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Acknowledgment
This research was partially supported by the FY-2009/10 Grant PRIN 2009.
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Giannini, O., Casini, P., Vestroni, F. (2014). Nonlinear Harmonic Identification of Cracks in Structures. In: Catbas, F. (eds) Dynamics of Civil Structures, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-04546-7_24
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DOI: https://doi.org/10.1007/978-3-319-04546-7_24
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