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

被引：0

作者：

Dou Y. ^{[1
,2
,3
]}

Wei K. ^{[1
,3
]}

Cao Y. ^{[2
]}

Wang S. ^{[4
]}

Qi W. ^{[2
]}

Wang P. ^{[1
,3
]}

机构：

[1] MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu

[2] Chengdu Vocational & Technical College of Industry, Chengdu

[3] School of Civil Engineering, Southwest Jiaotong University, Chengdu

[4] Department of Mechanical Engineering, The University of Auckland, Auckland

来源：

Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2023年 / 58卷 / 05期

关键词：

bending-torsion coupled; natural frequency; preload dependence; spectral element method and symplectic method; velocity admittance;

D O I：

10.3969/j.issn.0258-2724.20210774

中图分类号：

学科分类号：

摘要：

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. © 2023 Science Press. All rights reserved.

引用

页码：1056 / 1063

页数：7

共 17 条

[1] THOMPSON D J., Wheel-rail noise generation, part III: rail vibration, Journal of Sound and Vibration, 16, pp. 421-446, (1993)
[2] (2015)
[3] THOMPSON D., Railway noise and vibration: mechanisms, modelling and means of control, (2009)
[4] BANERJEE J R, WILLIAMS F W., Coupled bending–torsional dynamic stiffness matrix for Timoshenko beam elements, Computers & Structures, 42, 3, pp. 301-310, (1992)
[5] VINCENT N, BOUVET P, THOMPSON D J, Et al., Theoretical optimization of track components to reduce rolling noise, Journal of Sound and Vibration, 193, 1, pp. 161-171, (1996)
[6] KOSTOVASILIS D, THOMPSON D J, HUSSEIN MFM., A semi-analytical beam model for the vibration of railway tracks, Journal of Sound and Vibration, 393, pp. 321-337, (2017)
[7] TIMOSHENKO S, YOUNG D H., Vibration problems in engineering, (1955)
[8] LI J, SHI C X, KONG X S, Et al., Stochastic response of an axially loaded composite Timoshenko beam exhibiting bending-torsion coupling, Archive of Applied Mechanics, 84, 1, pp. 109-122, (2013)
[9] (2020)
[10] NONG Xingzhong, WEI Xiao, LI Xiang, Et al., Test and analysis of transverse vibration characteristics of commonly used vibration-damping rails in metro, Journal of Railway Engineering Society, 36, 1, pp. 43-47, (2019)

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