Dynamic response of a vehicle with flexible car body moving on a ballasted track

Yingjie Wang, Zuzana Dimitrovová, Jong Dar Yau

Research output: Contribution to journalConference article

Abstract

In this study, the dynamic response of a vehicle with flexible car body moving on a ballasted track is investigated. The vehicle/track interaction model is divided into two sub-systems, namely the vehicle and the ballasted track sub-system. The vehicle sub-system is composed by one flexible car body, two bogies and four wheel sets. The car body is created using flexible multibody dynamics. The ballasted track consists of rail, sleeper, ballast and sub-grade. For its representation the simplified 2D discrete support model (DSM) is used and modelled by finite elements. The connection between the two sub-systems, i.e. between the moving wheels and the track is ensured by a linearized Hertzian spring. The dynamic response of the vehicle/track system is computed by the Newmark-β integration method. The effect of the car body flexibility on the dynamic response of this system is analyzed and evaluated based on the maximum car center acceleration. It is concluded that the increase in flexural stiffness of the car body can lead to a notable decrease of its maximum acceleration.

Original languageEnglish
Article number11003
JournalMATEC Web of Conferences
Volume211
DOIs
Publication statusPublished - 10 Oct 2018
Event14th International Conference on Vibration Engineering and Technology of Machinery, VETOMAC 2018 - Lisbon, Portugal
Duration: 10 Sep 201813 Sep 2018

Fingerprint

flexible bodies
Railroad tracks
dynamic response
Dynamic response
vehicles
Railroad cars
wheels
Ballast (railroad track)
Wheels
Bogies (railroad rolling stock)
ballast
rails
Rails
grade
stiffness
flexibility
Stiffness

Keywords

  • Dynamic response
  • Machinery
  • Railroad cars

Cite this

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title = "Dynamic response of a vehicle with flexible car body moving on a ballasted track",
abstract = "In this study, the dynamic response of a vehicle with flexible car body moving on a ballasted track is investigated. The vehicle/track interaction model is divided into two sub-systems, namely the vehicle and the ballasted track sub-system. The vehicle sub-system is composed by one flexible car body, two bogies and four wheel sets. The car body is created using flexible multibody dynamics. The ballasted track consists of rail, sleeper, ballast and sub-grade. For its representation the simplified 2D discrete support model (DSM) is used and modelled by finite elements. The connection between the two sub-systems, i.e. between the moving wheels and the track is ensured by a linearized Hertzian spring. The dynamic response of the vehicle/track system is computed by the Newmark-β integration method. The effect of the car body flexibility on the dynamic response of this system is analyzed and evaluated based on the maximum car center acceleration. It is concluded that the increase in flexural stiffness of the car body can lead to a notable decrease of its maximum acceleration.",
keywords = "Dynamic response, Machinery, Railroad cars",
author = "Yingjie Wang and Zuzana Dimitrovov{\'a} and Yau, {Jong Dar}",
note = "National Natural Science Foundation of China 51403680 UID/EMS/5200 2/2013 2017JB 108",
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Dynamic response of a vehicle with flexible car body moving on a ballasted track. / Wang, Yingjie; Dimitrovová, Zuzana; Yau, Jong Dar.

In: MATEC Web of Conferences, Vol. 211, 11003, 10.10.2018.

Research output: Contribution to journalConference article

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AU - Dimitrovová, Zuzana

AU - Yau, Jong Dar

N1 - National Natural Science Foundation of China 51403680 UID/EMS/5200 2/2013 2017JB 108

PY - 2018/10/10

Y1 - 2018/10/10

N2 - In this study, the dynamic response of a vehicle with flexible car body moving on a ballasted track is investigated. The vehicle/track interaction model is divided into two sub-systems, namely the vehicle and the ballasted track sub-system. The vehicle sub-system is composed by one flexible car body, two bogies and four wheel sets. The car body is created using flexible multibody dynamics. The ballasted track consists of rail, sleeper, ballast and sub-grade. For its representation the simplified 2D discrete support model (DSM) is used and modelled by finite elements. The connection between the two sub-systems, i.e. between the moving wheels and the track is ensured by a linearized Hertzian spring. The dynamic response of the vehicle/track system is computed by the Newmark-β integration method. The effect of the car body flexibility on the dynamic response of this system is analyzed and evaluated based on the maximum car center acceleration. It is concluded that the increase in flexural stiffness of the car body can lead to a notable decrease of its maximum acceleration.

AB - In this study, the dynamic response of a vehicle with flexible car body moving on a ballasted track is investigated. The vehicle/track interaction model is divided into two sub-systems, namely the vehicle and the ballasted track sub-system. The vehicle sub-system is composed by one flexible car body, two bogies and four wheel sets. The car body is created using flexible multibody dynamics. The ballasted track consists of rail, sleeper, ballast and sub-grade. For its representation the simplified 2D discrete support model (DSM) is used and modelled by finite elements. The connection between the two sub-systems, i.e. between the moving wheels and the track is ensured by a linearized Hertzian spring. The dynamic response of the vehicle/track system is computed by the Newmark-β integration method. The effect of the car body flexibility on the dynamic response of this system is analyzed and evaluated based on the maximum car center acceleration. It is concluded that the increase in flexural stiffness of the car body can lead to a notable decrease of its maximum acceleration.

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