Numerical and experimental approach for the evaluation of severe longitudinal dynamics of heavy freight trains

Belforte, P.; Cheli, Federico; Diana, Giorgio; Melzi, Stefano

doi:10.1080/00423110802037180

Cited by 97 publications

(65 citation statements)

References 3 publications

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“…The similar methods were also applied in the dynamic analysis of vehicles passing through the switch sections. Belforte et al [29] established a 3-D vehicle dynamic model subjected to the coupler forces under the braking conditions, and then discussed the vehicle running safety in the switch sections. For the same research purpose, Pugi et al [30] put forward a mixed train model which consisted of the single-DOF wagons and the multi-DOF wagons.…”

Section: Introductionmentioning

confidence: 99%

Establishment and verification of three-dimensional dynamic model for heavy-haul train–track coupled system

Liu

Zhai

Wang

2016

Vehicle System Dynamics

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For the long heavy-haul train, the basic principles of the intervehicle interaction and train-track dynamic interaction are analysed firstly. Based on the theories of train longitudinal dynamics and vehicle-track coupled dynamics, a three-dimensional (3-D) dynamic model of the heavy-haul train-track coupled system is established through a modularised method. Specifically, this model includes the subsystems such as the train control, the vehicle, the wheel-rail relation and the line geometries. And for the calculation of the wheel-rail interaction force under the driving or braking conditions, the large creep phenomenon that may occur within the wheel-rail contact patch is considered. For the coupler and draft gear system, the coupler forces in three directions and the coupler lateral tilt angles in curves are calculated. Then, according to the characteristics of the long heavy-haul train, an efficient solving method is developed to improve the computational efficiency for such a large system. Some basic principles which should be followed in order to meet the requirement of calculation accuracy are determined. Finally, the 3-D train-track coupled model is verified by comparing the calculated results with the running test results. It is indicated that the proposed dynamic model could simulate the dynamic performance of the heavy-haul train well. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Establishment and verification of three-dimensional dynamic model for heavy-haul train–track coupled system

Liu

Zhai

Wang

2016

Vehicle System Dynamics

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“…(4), (5), (6), and (10). Thus, the finite element approach can be used as a reliable tool for predicting dynamic responses of draft pads.…”

Section: Discussionmentioning

confidence: 99%

“…5 A numerical procedure was developed by Belforte et al to investigate the dynamics of heavy freight trains. 6 The proposed methodology by Belforte et al combined a numerical model designed for the longitudinal dynamics of the whole trainset called TrainSet Dynamics simulator (TSDyn) with a multibody code named Modular Non-Stationary TRAMcar dynamics simulator originally developed to analyse the dynamics of modular tramcars (MoNSTram) and used for a more detailed investigation of the response of a trainset segment.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Draft Gear and Draft Pad of Freight Wagon due to Localized Defects using FEM

Harak¹,

Sharma²,

Harsha³

2016

IJAV

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The present work investigates the effect of a crack on the modal frequency of a draft pad. Initially, the first five mode shapes of a healthy draft pad and the first seven mode shapes of healthy draft gear considering compressed draft pads are determined using the finite element approach. A mathematical model of the draft pad is formulated to predict the effect of the crack on its modal frequency. A semi-elliptical shaped crack is modelled in the lateral and longitudinal direction of the draft pad. It is observed that if the crack lies in the zone of minimum modal displacement, then the frequency drop is minimal, and if the crack lies in the zone of maximum modal displacement, then the frequency drop is significant. Various damage scenarios are simulated by varying the width and aspect ratio of the crack in order to identify its effect on the modal frequency. It is seen that if the aspect ratio is varied while the crack's width is maintained constant, then the frequency drop is linear, whereas if the crack's width is varied while the aspect ratio is maintained constant, then the frequency drop is parabolic. This study provides a tool for monitoring exciting frequencies of draft gear and shows how each modal frequency is affected by the crack due to parameters like aspect ratio, crack width, and crack location/orientation.

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“…In [71] for example Qi et al model the longitudinal behaviour of a long train including traction and braking and the coupling between vehicles. Belforte et al [93] also analyse the effects of severe traction and braking forces on longitudinal dynamics.…”

Section: Longitudinal Dynamicsmentioning

confidence: 99%

Dynamics of railway freight vehicles

Iwnicki

Stichel

Orlova

et al. 2015

Vehicle System Dynamics

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This paper summarises the historical development of railway freight vehicles and how vehicle designers have tackled the difficult challenges of producing running gear which can accommodate the very high tare to laden mass of typical freight wagons whilst maintaining stable running at the maximum required speed and good curving performance. The most common current freight bogies are described in detail and recent improvements in techniques used to simulate the dynamic behaviour of railway vehicles are summarised and examples of how these have been used to improve freight vehicle dynamic behaviour are included. A number of recent developments and innovative components and sub systems are outlined and finally two new developments are presented in more detail: the LEILA bogie and the SUSTRAIL bogie.

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Numerical and experimental approach for the evaluation of severe longitudinal dynamics of heavy freight trains

Cited by 97 publications

References 3 publications

Establishment and verification of three-dimensional dynamic model for heavy-haul train–track coupled system

Establishment and verification of three-dimensional dynamic model for heavy-haul train–track coupled system

Dynamic Analysis of Draft Gear and Draft Pad of Freight Wagon due to Localized Defects using FEM

Dynamics of railway freight vehicles

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