A 3D model for coupling dynamics analysis of high-speed train/track system

It is very common in the ballasted track system that sleepers are not well supported by the ballast materials due to the uneven settlement of the ballast under repeated train passage. These unsupported track elements are often termed as hanging sleepers and they can lead to undesirable effects due to increased dynamic response of the train-track system, especially when the speed of the train is high. In this paper, we present a computation scheme in conjunction with the moving element method for the analysis of high-speed train-track dynamics accounting for hanging sleepers. The proposed computational scheme will be first verified by comparison with available analytical results. The dynamic response of a high-speed train traveling on a ballasted track considering unsupported sleepers is next investigated. Various factors affecting the response of the high-speed rail system including the speed of the train, the number of hanging sleepers and the pattern of the hanging sleepers will be examined and discussed.

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Numerical Modeling of High-Speed Train/Track System to Assess Track Vibrations and Settlement Prediction

Journal of Transportation Engineering ◽

10.1061/(asce)te.1943-5436.0000482 ◽

2013 ◽

Vol 139 (3) ◽

pp. 330-337 ◽

Cited By ~ 16

Author(s):

P. A. Ferreira ◽

A. López-Pita

Keyword(s):

Numerical Modeling ◽

High Speed ◽

High Speed Train ◽

Train Track ◽

Settlement Prediction ◽

Track System

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Dynamic Effects in a High-Speed Train-Track System

Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance ◽

10.4203/ccp.104.220 ◽

2014 ◽

Author(s):

R. Bogacz ◽

K. Frischmuth ◽

W. Czyczula

Keyword(s):

High Speed ◽

High Speed Train ◽

Train Track ◽

Dynamic Effects ◽

Track System

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Equilibrium Characteristics of High-Speed Train in Crosswind

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.275-277.532 ◽

2013 ◽

Vol 275-277 ◽

pp. 532-536 ◽

Cited By ~ 1

Author(s):

Yong Quan Deng ◽

Tian Li ◽

Yi Sheng Zou ◽

Ji Ye Zhang ◽

Wei Hua Zhang

Keyword(s):

High Speed ◽

High Speed Train ◽

Train Track ◽

Fluid Structure ◽

Structure Interaction ◽

Fast Approach ◽

Coupling Dynamics ◽

Dynamic Performances ◽

Train Dynamics ◽

State Method

A fast approach to high-speed train co-simulation between aerodynamics and train-track coupling dynamics is presented. With this method, the fluid-structure dynamic performances of a high-speed train are simulated with different crosswind velocity and train velocity. The aerodynamic forces and train dynamics are compared under off-line simulation and equilibrium state method. Considering the fluid-structure interaction, there is significant influence on the head aerodynamics and train dynamics. The results show that it is necessary to consider changing attitude in crosswind

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ANALYSIS OF HIGH-SPEED RAIL ACCOUNTING FOR JUMPING WHEEL PHENOMENON

International Journal of Computational Methods ◽

10.1142/s021987621343007x ◽

2014 ◽

Vol 11 (03) ◽

pp. 1343007 ◽

Cited By ~ 20

Author(s):

KOK KENG ANG ◽

JIAN DAI ◽

MINH THI TRAN ◽

VAN HAI LUONG

Keyword(s):

High Speed ◽

Computational Study ◽

Dynamic Responses ◽

Contact Model ◽

High Speed Train ◽

Train Track ◽

Hertz Contact ◽

High Speed Rail ◽

Track System ◽

Hertz Contact Model

In this paper, a computational study using the moving element method (MEM) was carried out to investigate the dynamic response of a high-speed train–track system. Results obtained using Hertz contact model and linearized Hertz contact model are compared and discussed. The dynamic responses of a train travelling across a uniform foundation and a transition region are also investigated. Parametric study is performed to understand the effect of various factors on the occurrence and patterns of the jumping wheel phenomenon such as the variation of foundation stiffness, travelling speed of the train and the severity of railhead roughness.

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