Prediction of Wheel/Rail Interaction: The State-of-the-Art

Elkins, J A

doi:10.1080/00423119208969385

Cited by 26 publications

(20 citation statements)

References 14 publications

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“…This model includes additional ballast masses below each sleeper, which are interconnected by springs and dashpots in shear [3]. The contact between the wheel and rail is modeled by non-linear Hertzian spring elements [4].…”

Section: Model Equations and Solution Methodsmentioning

confidence: 99%

Sensitivity analysis of track parameters on train-track dynamic interaction

Zakeri

Xia

2008

J Mech Sci Technol

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Dynamic behavior of railway tracks when trains are running is influenced by several factors, i.e. rolling stock, the components of superstructure and their specifications. Usually, features like the sleeper spacing, rail pad stiffness, ballast damping and stiffness have an effect on the dynamic response of the track. The best method to study the dynamic behavior of the track is to model the track assembly and the train as a whole and carry out an analysis of dynamic interaction. Such analysis makes the identification of the track's dynamic behavior easer and helps to anticipate the deterioration of the track elements, and determines the effects of increase or decrease of mentioned parameters. This paper presents track-train dynamic interaction without considering irregularity of the rail face. A sensitivity analysis was carried out on the selected model. The analysis was undertaken with the view of varying one of the mentioned parameters and the results were presented to further identify the deterioration of the track elements.The results indicate that reducing sleeper spacing, rail pad stiffness, ballast stiffness, and increasing ballast damping reduces wheel-rail, rail-sleeper, and sleeper -ballast contact forces.

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Section: Model Equations and Solution Methodsmentioning

confidence: 99%

Sensitivity analysis of track parameters on train-track dynamic interaction

Zakeri

Xia

2008

J Mech Sci Technol

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“…where so-called equivalent conicity (Elkins, 1992) has got key significance. Critical velocity obtained in such conditions is often called linear one and denoted v c .…”

Section: A C C E P T E D Article In Pressmentioning

confidence: 99%

Self-exciting vibrations and Hopf's bifurcation in non-linear stability analysis of rail vehicles in a curved track

Zboiński

Dusza

2010

European Journal of Mechanics - A/Solids

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Please cite this article as: Zboinski, K., Dusza, M. Self-exciting vibrations and Hopf's bifurcation in nonlinear stability analysis of rail vehicles in a curved track, European Journal of Mechanics / A Solids (2009), doi: 10.1016/j.euromechsol.2009.10.001 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Abstract -the main objective of this article is to present the authors' view of-and results on non-linear lateral stability of rail vehicles in a curved track. Three elements are exploited in order to secure this objective. Firstly, physical genesis of the problem is discussed, and its similarity to straight track analysis is emphasized. Results of the theories of self-exciting vibrations and bifurcation are the key elements here. Secondly, the method suitable for analysis in a curved track is presented. New necessary elements, extending the better established methods for straight track are clearly mentioned and described. The methodology of building original stability maps, being the basis for the analysis and valid for whole range of curve radii and straight track is represented. Thirdly, a sample of the analysis is shown in order to give the idea how the method can be utilised. The case study refers to the influence of wheel/rail profiles on the stability in circularly curved track and straight track as well. Two different pairs of wheel/rail profiles are used and the corresponding results compared. The main contributions of the article are: a discussion of the physical nature of phenomena related to the stability in a curved tracks, and the method (procedure) established for the reasons of the analysis. Another and more general contribution is our say in the hot polemics on the advisability of stability analysis in curves and the advantages of the non-linear critical speed over the linear one. M A N U S C R I P T A C C E P T E D ARTICLE IN PRESS Self-exciting vibrations and Hopf's bifurcation in non-linear stability analysis of rail vehicles in a curved track

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“…The models utilized linear geometry of wheel-rail contact description based on equivalent conicity (e.g. [8,11]) concept. Recently, the consistent opinion exists that results obtained from linear models may be uncertain to predict features of real object.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation analysis of 4-axle rail vehicle models in a curved track

Zboiński

Dusza

2017

Nonlinear Dyn

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The article presents authors' recent results on nonlinear lateral stability of rail vehicles in a curved track. The theories of self-exciting vibrations and bifurcation are the key elements here. The general objective is presentation of extended use of the earlier worked out authors' method to more complex rail vehicle models. Two 4-axle vehicle models were created. The first one represents coach MKIII described with multibody software by the first author. The second one represents coach 127A described with use of engineering multibody software VI-Rail. The models are described, and method of the analysis is shortly reminded. Then, results for both models are presented. They include verification of the limit cycle possible passage from straight track to circular curve and stability maps for regular curves of different radii and straight track. Next influence of selected suspension parameter and wheelrail coefficient of friction on vehicle stability is shown. The more general objective is the authors' say in the hot polemics on the advisability of rail vehicle stability analysis in curves and on the advantages of the nonlinear methods of such analysis over the linear ones.

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Prediction of Wheel/Rail Interaction: The State-of-the-Art

Cited by 26 publications

References 14 publications

Sensitivity analysis of track parameters on train-track dynamic interaction

Sensitivity analysis of track parameters on train-track dynamic interaction

Self-exciting vibrations and Hopf's bifurcation in non-linear stability analysis of rail vehicles in a curved track

Bifurcation analysis of 4-axle rail vehicle models in a curved track

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