市域快线减振垫浮置板轨道过渡段动力学分析

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Abstract Research purposes: In order to study the reasonable setting of the transition section of vibration-reduction pad floating slab track on urban express line, the vertical coupling dynamic calculation model of vehicle track transition section ballastless track is established according to the principle of vehicle-track coupling dynamics. The dynamic response of wheel-rail system caused by CRH6 train passing through the transition section between double-block ballastless track and rubber vibration-reduction pad floating slab track at a speed of 160 km/h is calculated. The rail deflection change rate is selected as an evaluation index to measure the rationality of the transition section setting. The influence of different damping pad stiffness, transition stage number and adjacent transition stiffness ratio on rail deflection change rate is analyzed in detail.
Research conclusions: (1)The stiffness difference at the joint between the double-block ballastless track and the rubber vibration-reduction pad floating slab track has a significant influence on the rail displacement and rail deflection change rate under the wheelset, but has a relatively little influence on the vertical acceleration of the train body and the wheel-rail force; (2)When the stiffness of rubber vibration-reduction pad is less than or equal to 50 MPa / m, the rail deflection change rate exceeds the limit value of 0.30 mm/m, so it is necessary to set a certain length of stiffness transition section at the joint of two kinds of tracks; (3)When the stiffness of the vibration-reduction pad in the standard vibration-reduction section is 25 MPa/m, it is suggested to set up three-level stiffness transition sections, each of which is a single slab track long, with a total length of 19.5 m, and the stiffness ratio of adjacent transition sections should be in the range of 1.4~1.6; (4)The research conclusion can provide some theoretical guidance for the design of the transition section of the rubber vibration-reduction pad floating slab track of the urban express line.

Key words： urban express line rubber vibration-reduction pad floating slab wheel-rail system dynamics transition section

Received: 22 December 2020

PACS:

U213.2

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	FENG Qingsong
	SUN Kui

Cite this article:

FENG Qingsong,SUN Kui. Dynamic Analysis of Vibration-reduction Pad Floating Slab Track Transition Section on Urban Express Line[J]. Journal of Railway Engineering Society, 2022, 39(3): 40-45.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I3/40

[1]	韩志刚. 市域铁路轻型橡胶隔振垫减振轨道系统研究[J]. 铁道工程学报,2020(6):41-45.Han Zhigang. The System Research for Lower Weight Rubber Isolation Pad Vibration Reduction Track for Suburban Railway[J]. Journal of Railway Engineering Society,2020(6):41-45.
[2]	蔡成标, 刘增杰, 赵汝康. 浮置板轨道过渡段的动力学设计[J]. 铁道建筑,2003(12):41-44.Cai Chengbiao, Liu Zengjie, Zhao Rukang. Dynamic Design of Floating Slab Track Transition Section[J]. Railway Engineering,2003(12):41-44.
[3]	雷晓燕, 张斌, 刘庆杰. 轨道过渡段动力特性的有限元分析[J]. 中国铁道科学,2009(5):15-21.Lei Xiaoyan, Zhang Bin, Liu Qingjie. Finite Element Analysis on the Dynamic Characteristics of the Track Transition[J]. China Railway Science,2009(5):15-21.
[4]	李成辉, 亓伟, 耿浩, 等. 有砟-无砟轨道过渡段动不平顺特性研究[J]. 铁道工程学报,2017(5):20-25.Li Chenghui,Qi Wei, Geng Hao, etc. The Characteristics Analysis of Dynamic Irregularity at Transition Zones of Ballasted Track and Ballastless Track[J]. Journal of Railway Engineering Society, 2017(5):20-25.
[5]	Aggestam E, Nielsen J C O. Multi-objective Optimisation of Transition Zones Between Slab Track and Ballasted Track Using a Genetic Algorithm[J]. Journal of Sound and Vibration, 2019, 446:91-112.
[6]	Zhai W M. Two Simple Fast Integration Methods for Large-scale Dynamic Problems in Engineering[J]. International Journal for Numerical Methods in Engineering, 1996(24):4199-4214.
[7]	蔡成标, 徐鹏. 高速铁路无砟轨道关键设计参数动力学研究[J]. 西南交通大学学报,2010(4):493-497.Cai Chengbiao, Xu Peng. Dynamic Analysis of Key Design Parameters for Ballastless Track of High-speed Railway[J]. Journal of Southwest Jiaotong University, 2010(4):493-497.