PSI - Issue 64

Claude Rospars et al. / Procedia Structural Integrity 64 (2024) 716–723 Rospars & al. / Structural Integrity Procedia 00 (2019) 000–000

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between several mother wavelet functions, including the Littlewood-Paley, often used for dynamic analysis of railway bridges, which is found to be inappropriate for these signals due to unnecessary oscillations and excessive edge effects. Its precise tuning, using the quality factor, is detailed in Carpine (2022). Finally, the application of the presented procedure to real data illustrates the ability of the CWT to detect and characterise non-linear behaviour. It was possible to detect a clear and strong dependence of the first three natural frequencies of the bridge on the amplitudes of the associated modes, which could have been misinterpreted as an effect of the inertia of the train. References Abdel Wahab, M.M., De Roeck, G., 1999. Damage detection in bridges using modal curvatures: application to a real damage scenario, Journal of Sound and Vibration, Vol 226: 2, pp. 217-235, doi: 10.1006/jsvi.1999.2295. 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Carpine R., Ientile S., Vacca N., Boscato G., Rospars C., Cecchi A, Argoul P., 2021. Modal identification in the case of complex modes – use of the wavelet analysis applied to the after-shock responses of a masonry wall during shear compression tests, Mechanical Systems and Signal Processing 160, 107753. doi:10.1016/j.ymssp.2021.107753. Carpine R. 2022. Détection de défauts dans les structures de génie civil par analyse en ondelettes de réponse vibratoire, in French, PhD Thesis, Ecole Doctorale Paris Est, .http://www.theses.fr/2022UEFL2064/document. Cremona, C., 2004. Dynamic monitoring applied to the detection of structural modifications: a high-speed railway bridge study, Progress in Structural Engineering and Materials, 6 (3), pp. 147—161, Juillet 2004, doi : 10.1002/pse.177. Frýba, L., 1972. Vibration of solids and structures under moving loads, Springer Netherlands, Dordrecht, doi: 10.1007/978-94-011-9685-7. Géradin, M., Rixen D., 2015. 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Vacca, N., Rouzaud, C., Hervé-Secourgeon, G., Galan, M., Argoul, P., Rospars, C., 2018. Characterization of dissipative behaviour of a reinforced concrete mock-up after soft impact tests through wavelet analysis, In proceedings of 40th IABSE Symposium Tomorrow's Megastructures, International Association for Bridge and Structural Engineering, 8 pages S4-47, Nantes, France, doi: 10.2749/nantes.2018.s4-47. Zeng, X.-H., Lai, J., Wu H., 2018. Hunting stability of high-speed railway vehicles under steady aerodynamic loads, International Journal of Structural Stability and Dynamics 18 (07), 1850093. doi:10.1142/S0219455418500931.