Abstract
Nowadays, diagnostic is an important assessment of integrity of structural components. Amongst the technologies capable of monitoring structural integrity the continuous scanning (CS) measurement method can be a valid alternative in quasi real-time acquisition methods. Its major feature is the capacity of continuously recording vibration response by sweeping a laser beam over a surface. The LDV output signal will be amplitude modulated because of the periodicity of the scanning for a given vibration oscillation. The spectral content of the LDV output signal is made of sidebands, which can be used for representing an Operational Deflection Shape of the structure. This paper proposes a numerical study focused on the changes of the spectral signature of the sidebands when a damage occurs in a structure. The major objective is to map these changes against an undamaged spectral signature and evaluate if this approach can be used for diagnostic purposes.
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Di Maio, D.: Damage monitoring using continuous scanning LDV methods: numerical approach. Optical Measurement Techniques for Systems and Structures III. Editor Joris Dirckx, (2016). ISBN 978-90-423-0439-0
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© 2016 The Society for Experimental Mechanics, Inc.
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Di Maio, D. (2016). Use of Continuous Scanning LDV for Diagnostics. In: De Clerck, J., Epp, D. (eds) Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-30084-9_11
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DOI: https://doi.org/10.1007/978-3-319-30084-9_11
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