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Volume 58 Issue 5
Oct.  2023
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Journal of Southwest Jiaotong University  > 2023  >  58(5): 1056-1063.
DOU Yinling, WEI Kai, CAO Yong, WANG Shaohua, QI Wei, WANG Ping. Effect of Bending-Torsional Coupling of Beams on Lateral Vibration Characteristics of Rails[J]. Journal of Southwest Jiaotong University, 2023, 58(5): 1056-1063. doi: 10.3969/j.issn.0258-2724.20210774
Citation: DOU Yinling, WEI Kai, CAO Yong, WANG Shaohua, QI Wei, WANG Ping. Effect of Bending-Torsional Coupling of Beams on Lateral Vibration Characteristics of Rails[J]. Journal of Southwest Jiaotong University, 2023, 58(5): 1056-1063. doi: 10.3969/j.issn.0258-2724.20210774
shu

Effect of Bending-Torsional Coupling of Beams on Lateral Vibration Characteristics of Rails

doi: 10.3969/j.issn.0258-2724.20210774
  • 1.

    MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China

  • 2.

    Chengdu Vocational & Technical College of Industry, Chengdu 610031, China

  • 3.

    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

  • 4.

    Department of Mechanical Engineering, The University of Auckland, Auckland 1010, New Zealand

  • Received Date: 07 Oct 2021
  • Rev Recd Date: 05 Jan 2022
    • Available Online: 26 Apr 2023
  • Publish Date: 14 Jan 2022
    Abstract

  • To accurately predict the propagation of elastic waves in rails and explore the necessity of considering the bending-torsional coupling (BTC) of Timoshenko beam, a rail-fastener spatial infinite model considering the BTC of the beam was developed based on the spectral element method (SEM) and the symplectic method (SM). Based on model verification, the BTC effect of Timoshenko beam on the lateral natural frequency and velocity admittance of the rail was analyzed, and the effect of vertical preload dependence of fastener pads on the lateral bending vibration characteristics of the rail was analyzed theoretically and experimentally. The research results show that because of the BTC effect of the beam, the lateral bending resonance frequency (BRF) of the rail increases by about 29.6 Hz, and the bending and torsional pinned-pinned modes appear simultaneously in the lateral bending vibration of the rail. The vertical preload dependence of fastener pads mainly affects the lateral low- and mid-frequency vibrations of the rail. As the preload increases, the lateral BRF of the rail increases. When the preload is increased from 30 kN to 50 kN, the measured lateral BRF increases by about 13.7 Hz, while the increase is about 12.5 Hz and 21.7 Hz by considering the BTC effect of the beam or not. The variation law of lateral BRF of the rail considering the BTC of the beam under different preloads is closer to the measured results.

     

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    • References(17)
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