Double Sub-Resonance Mechanism in Torsional–Flexural Vibrations of a Double-Track Short Bridge Under a Moving Train
學年 110
學期 2
出版（發表）日期 2022-07-15
作品名稱 Double Sub-Resonance Mechanism in Torsional–Flexural Vibrations of a Double-Track Short Bridge Under a Moving Train
作品名稱（其他語言）
著者 Yao, Zhongda
單位
出版者
著錄名稱、卷期、頁數 International Journal of Structural Stability and Dynamics 22(16),　2271005
摘要 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.
關鍵字 HSR;resonance;short bridge;sub-resonance;train− bridge system;VBI
語言 en
ISSN 1793-6764
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度 是
國別 SGP
公開徵稿
出版型式 ,電子版
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