﻿ 钢轨支承方式对地铁线路轮轨动力性能的影响 Effect of Rail Support Mode on Wheel/Rail Dynamic Interaction of Metro Lines

Open Journal of Transportation Technologies
Vol.06 No.04(2017), Article ID:20861,8 pages
10.12677/OJTT.2017.64016

Effect of Rail Support Mode on Wheel/Rail Dynamic Interaction of Metro Lines

Yabo Cao1, Liang Ling2, Qinghua Guan2

1Guangzhou Metro Design & Research Institute Co. Ltd., Guangzhou Guangdong

2State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu Sichuan

Received: May 18th, 2017; accepted: Jun. 3rd, 2017; published: Jun. 6th, 2017

ABSTRACT

Rails are discretely supported by uniformly distributed sleepers in traditional tracks. The rail support mode not only affects the constructing cost of metro lines, but also influences the running safety and stability of metro vehicles. This paper presents a study of the wheel/rail dynamic interactions of metro lines with continually and discretely supported rails by using vehicle-track dynamics simulations. Through numerical analysis, it is found that the innovative track with continually supported rails has advantages over the traditional track with discretely supported rails for the potentialities to reduce the dynamic wheel/rail force and the vibration level of rails. For the traditional track with discretely supported rails, a smaller sleeper span results in higher dynamics wheel/rail impact force and rail vibration acceleration due to sleeper passing excitation.

Keywords:Metro, Track, Continue Support, Discrete Support, Sleeper Span, Wheel/Rail Dynamic

1广州地铁设计研究院有限公司，广东 广州

2西南交通大学牵引动力国家重点实验室，四川 成都

1. 引言

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Figure 1. Rail track structure with discretely and continually supported. (a) Discrete support rail track structure; (b) Rail continuous support track structure

2. 数值模拟

Figure 2. Metro vehicle-track coupling dynamic model

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3. 计算结果及分析

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Figure 3. Effect of railsupport on wheel/rail force. (a) Different ways of rail support; (b) Different sleeper spacing

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Figure 4. Effect of railsupport on rail deformation. (a) Different ways of rail support; (b) Different sleeper spacing

Figure 5. Effect of sleeper span on wheel/rail normal force

Figure 6. Effect of sleeper span on rail vertical acceleration

Figure 7. Effect of sleeper span on rail vertical displacement

4. 结论

Effect of Rail Support Mode on Wheel/Rail Dynamic Interaction of Metro Lines[J]. 交通技术, 2017, 06(04): 121-128. http://dx.doi.org/10.12677/OJTT.2017.64016

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