Dynamic Characteristics Study of U-Beam Applied in Rail Transit

Abstract:

The Train-Track-Bridge coupling vibration theory was applied to analyze the dynamic characteristics of a U-beam serviced in Chongqing Rail Transit Line 1 in China. According to the analysis, for the U-beam form of this opening cross-section, the traditional 3D beam element model can only reflect the first-order vibration mode, but neglect the coupled local flexure and torsion vibration characteristics; the 3D beam element model overestimates the lateral stiffness of the bridge, and underestimates it’s lateral vibration; the 3D plate element model is reasonable in dynamic analysis of opening cross-section structure; the vibration of U-beam dominates in the frequency range of f < 250, which is accurate and efficient to take into account this frequency range in the analysis of noise radiated by bridge structure.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 2021-2026
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.2021
• Online since: May 2011
• Authors: Xun Zhang, Xiao Zhen Li, Ya Dong Li
• Keywords: Dynamic Characteristic, Rail Transit, Train-Track-Bridge Coupling Vibration, U-Beam

References

[1] G. H. Zhou and Y. S. Zhang: Building Construction Vol. 30(7) (2008), p.575 (in Chinese)

[2] M. Guo: Guangdong Architecture Civil Engineering Vol. 4 (2008), p.12 (in Chinese)

[3] E.H. He: Journal of Railway Engineering Society Vol. 78 (2003), p.13 (in Chinese)

[4] J. H. Su: Special Structures Vol. 25(3) (2008), p.84 (in Chinese)

[5] H. Xia, N. Zhang, H. R. Zhang and DE ROECK Guido: Engineering Mechanics Vol. 20(6) (2003), p.99 (in Chinese)

[6] D. J. Thompson: Railway Noise and Vibration: Mechanisms, Modeling and Means of Control (Elsevier Ltd., UK 2009).

[7] W. M. Zhai: Vehicle-Track Coupling Dynamics (Third Edition) (Science Press, China 2007).