Using shock excitation in condition monitoring of prestressed structures
Adam Gałęzia , Stanisław Radkowski , Krzysztof Szczurowski
Relying on the assumption that occurrence of damage in prestressed elements can result in change of stress distribution across the entire cross-section and appearance of tensile instead of compressive stresses, and the related emergence of a neutral axis, we proposed a method of evaluating early stages of defect formation that rely on the analysis of the process of vibroacoustic signal generation process. Assuming that changes of stress will lead to disturbance in the propagation of the stress wave across the pre-stressed structure that is incited by a pulse, the proposed diagnosis algorithm refers to the analysis of frequency structure, including the analysis of the envelope and frequency modulation in defined frequency bands that are characteristic for the examined object. In paper are presented results of experiments elaborate on real structures with simulated faults of different types.
|Publication size in sheets||0.5|
|Book||Eberhardsteiner J. (eds.): 13th International Congress on Sound and Vibration 2006 : (ICSV 13) ; Vienna, Austria, 2 - 6 July 2006, 2013, Curran, ISBN 3-95-01554-5-7|
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