Double sub-resonance mechanism in torsional-flexural vibrations of a double-track short bridge under a moving train

0561250 - ÚTAM 2023 RIV SG eng J - Článek v odborném periodiku
Wang, Y. J. - Yau, J. D. - Shi, J. - Urushadze, Shota
Double sub-resonance mechanism in torsional-flexural vibrations of a double-track short bridge under a moving train.
International Journal of Structural Stability and Dynamics. Roč. 22, č. 16 (2022), č. článku 2271005. ISSN 0219-4554. E-ISSN 1793-6764
Grant CEP: GA ČR(CZ) GC21-32122J
Klíčová slova: HSR * resonance * short bridge * sub-resonance * train-bridge system * VBI
Obor OECD: Civil engineering
Impakt faktor: 3.6, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1142/S0219455422710055

Train-induced resonance of a railway bridge occurs when the train speed coincides with the primary resonance speed (vbr) of the bridge, from which we can determine the sub-resonance speed as (vbr∕n|n=2,3). The primary resonance speed of a short bridge is generally much higher than the operation speeds of current high-speed trains but the corresponding sub-resonance speeds probably lie in the operation speed range. Such a resonance scenario can be observed from the vibration of a double-track bridge subjected to an eccentrically moving train, in which the deck vibration is combined by the vertical-flexural and torsional vibration modes of the bridge. Once the two modal sub-resonance speeds coincide with each other, a double sub-resonance will be developed on the bridge. In this study, an iteration-based train–bridge interaction finite element procedure will be presented to demonstrate the double resonance phenomenon. As expected, the double resonance may bring about a dramatic amplification on deck vibration. Such an excessive vibration is harmful to ballast stability and track maintenance of railway bridges.
Trvalý link: https://hdl.handle.net/11104/0335751