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Analysis on dynamic characteristics of track with floating fasteners considering loading of flexible wheelsets |
YAO Xuedong,LI Wei,ZHOU Zhijun,WEN Zefeng |
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China |
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Abstract The floating fastener is a type of resilient fasteners with very low vertical stiffness. However, short-pitch rail corrugation occurs on tracks with the floating fasteners on China metro lines, resulting in large vehicle interior vibration noise. To investigate the dynamic characteristics of the track, a three-dimensional finite element model of the track is established using the finite element software ABAQUS. The modal analysis and harmonic response analysis are conducted to investigate the dynamic characteristics of the track loaded by flexible wheelsets. The results show that: The wave reflection effect caused by the simplified truncated boundary of a periodically discrete supported track on the dynamic characteristics of the track is significant when the length of track in the numerical model is not enough. The effect of the boundary wave reflections can be ignored when the length of track model in the frequencies of below 1500 Hz is more than 80 sleeper spacings. In the frequencies of 10–80 Hz, the vibration modes of the track structure are bending and torsional vibrations of rail and slab as a whole. However, at above 80 Hz, the rail vibrates relative to the slab which also shows a bending vibration. The vertical dynamic characteristics of track at below 500 Hz are significantly influenced by the wheel–rail contact stiffness and the wheelset mass. But they are not influenced by the contact stiffness and the wheelset mass when the frequency is large than the first-order vertical pinned-pinned resonance frequency of the rail. The rail will show local bending vibration characteristics if double wheelsets of the bogie are considered. Harmonic peaks appear of the vertical dynamic characteristics of track under the influence of the first-order bending, second-order bending and umbrella modes of the wheel.
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Received: 02 November 2022
Published: 28 December 2023
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[1] Li W, Zhou Z, Zhao X, et al. Formation mechanism of short-pitch rail corrugation on metro tangent tracks with resilient fasteners[J]. Vehicle System Dynamics, 2022: 1-22. DOI:10.1080/00423114.2022.2086143.
[2] 李伟. 地铁钢轨波磨成因及其对车辆/轨道行为的影响[D]. 成都:西南交通大学,2015.
LI Wei. Study on root cause of metro rail corrugation and its influence on behavior of vehicle-track system[D]. Chengdu: Southwest Jiaotong University, 2015.
[3] Li S, Li Z, Núñez A, et al. New insights into the short pitch corrugation enigma based on 3D-FE coupled dynamic vehicle-track modeling of frictional rolling contact[J]. Applied Sciences, 2017, 7(8): 807.
[4] Zhang P, Li S, Núñez A, et al. Multimodal dispersive waves in a free rail: Numerical modeling and experimental investigation[J]. Mechanical Systems and Signal Processing, 2021, 150: 107305.
[5] WU T X. Effects on short pitch rail corrugation growth of a rail vibration absorber/damper[J]. Wear, 2011, 271(1-2): 339-348.
[6] 李伟,杜星,王衡禹,等. 地铁钢轨一种波磨机理的调查分析[J]. 机械工程学报,2013,49(16):26-32.
LI Wei, DU Xing, WANG Hengyu, et al. Investigation into the mechanism of type of rail corrugation of metro[J]. Journal of Mechanical Engineering, 2013, 49(16):26-32.
[7] Wu T X, Thompson D J. An investigation into rail corrugation due to micro-slip under multiple wheel/rail interactions[J]. Wear, 2005, 258(7-8): 1115-1125.
[8] TASSILLY E, VINCENT N. A linear model for the corrugation of rails[J]. Journal of Sound and Vibration, 1991, 150(1): 25-45.
[9] FANG G, WANG Y, PENG Z, et al. Theoretical investigation into the formation mechanism and mitigation measures of short pitch rail corrugation in resilient tracks of metros[J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2018, 232(9): 2260-2271.
[10] Cui X L, Chen G X, Yang H G, et al. Study on rail corrugation of a metro tangential track with Cologne-egg type fasteners[J]. Vehicle System Dynamics, 2016, 54(3): 353-369.
[11] Grassie S L, Kalousek J. Rail corrugation: characteristics, causes and treatments[J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 1993, 207(1): 57-68.
[12] Ma C, Gao L, Xin T, et al. The dynamic resonance under multiple flexible wheelset-rail interactions and its influence on rail corrugation for high-speed railway[J]. Journal of Sound and Vibration, 2021, 498: 115968.
[13] 刘孟奇,陶功权,肖国放,等. 中高频激励下轮轨不同建模方法对轮轨动态相互作用的影响[J]. 振动与冲击,2021,40(10):150-158.
LIU Mengqi, TAO Gongquan, XIAO Guofang, et al. Influence of wheelset and track modelling approaches on wheel-rail dynamic interaction under the excitation of medium-high frequency[J]. Journal of Vibration and Shock, 2021, 40(10): 150-158.
[14] 魏伟,翟婉明. 轮轨系统高频振动响应[J]. 铁道学报,1999,21(2):42-45.
WEI Wei, ZHAI Wanming. Dynamic response of wheel/rail system to high-frequency excitation[J]. Journal of the China Railway Society, 1999, 21(2): 42-45.
[15] 关庆华,周业明,李伟,等. 车辆轨道系统的P2共振频率研究[J]. 机械工程学报,2019,55(8):118-127.
GUAN Qinghua, ZHOU Yeming, LI Wei, et al. Study on the P2 resonance frequency of vehicle track system[J]. Journal of Mechanical Engineering, 2019, 55(8): 118-127.
[16] Avitabile P. Modal testing: a practitioner's guide[M]. John Wiley & Sons, 2017.
[17] 魏伟. 轨道系统导纳分析模型[J]. 大连交通大学学报,1998,19(4):33-38+44.
WEI Wei. Admittance analysis model of track system[J]. Journal of Dalian Jiaotong University, 1998, 19(4): 33-38+44.
[18] 于淼. 高速铁路轨道-车辆系统高频瞬态仿真及波磨机理研究[D]. 北京:中国铁道科学研究院,2019.
YU Miao. Transient simulation for high-speed track/vehicle system and study on rail corrugation[D]. Beijing: China Academy of Railway Sciences, 2019.
[19] 马超智,高亮,曾钦娥,等. 高速铁路轮轨耦合振动模态特征及其影响因素研究[J]. 铁道学报,2021,43(12):85-93.
MA Chaozhi, GAO Liang, Zeng Qine, et al. Study on modal characteristics and influencing factors of wheel-rail coupling vibration of high-speed railway. Journal of the China Railway Society, 2021, 43(12): 85-93. |
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. [J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(5): 27-. |
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