Journal ArticleDOI
A Three Dimensional Wheelset Dynamic Analysis considering Wheel-rail Two Point Contact
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TLDR
In this article, a three-dimensional wheelset dynamic analysis is presented in such a way that the precise wheel-rail contact analysis in 3D is implemented into the dynamic equations of a wheelset.Abstract:
Wheelset dynamic analysis is a key element to determine the degree of accuracy of railway vehicle dynamics. In this study, a three-dimensional wheelset dynamic analysis is presented in such a way that the precise wheel-rail contact analysis in three-dimension is implemented into the dynamic equations of a wheelset. A numerical procedure that can be used for the analysis of a wheelset dynamics when the wheel-rail two point contact occurs in a cornering maneuver is developed. Numerical solutions of the constraint equations and the dynamics equations of a wheelset are achieved by using Runge-Kutta method. The proposed wheelset dynamic analysis is validated by comparison against results obtained from VI-RAIL analysis.read more
Citations
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Running Safety Analysis of Railway Vehicle passing through Curve depending on Rail Inclination Change
TL;DR: In this article, the authors focused on the analyzing of running safety regard to the change of rail inclination among the many other parameters to improve derailment safety, so that there is an affection analysis of the running safety with respect to changes in rail inclination in the ideal and geometric track condition.
Journal Article
A Study on Numerical Analysis of Wheel-rail Contact Points
TL;DR: In this article, a numerical analysis method to determine flange contact at variable wheel positions is presented, where the shapes of the wheel and rail surface functions with surface parameters are obtained by combining the Newton-Rhapson method and the optimization process method.
Journal ArticleDOI
Analysis of Running Safety According to Changes of Guard Rail Length on F10/F12 Turnout
TL;DR: In this paper, the authors proposed a method to solve the problem of the lack of a suitable solution for the problem by using the concept of the "missing link" in the first place, i.e., the link between the source and the destination.
Journal ArticleDOI
Analysis of Dynamic Equilibrium Configuration of Speed Governor
TL;DR: In this paper, a multibody dynamic analysis is used to obtain the dynamic equilibrium configuration of a constrained mechanical system by using multi-body dynamic analysis, and the results are verified on the basis of the results from conventional dynamic analysis.
References
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Journal ArticleDOI
A Fast Algorithm for the Simplified Theory of Rolling Contact
TL;DR: An algorithm “Fastsim” for the simplified theory of rolling contact is described which is 15-25 times as fast as the existing programs Simrol (Kalker), and 3 times asfast as Rolcon (Knothe).
Journal ArticleDOI
A fast wheel-rail forces calculation computer code
TL;DR: A fast algorithm and computer code for the computation of wheel-rail forces under known contact geometry and creep and spin conditions is presented and can be used instead of simple formulas to improve the accuracy or as a substitution of Kalker's programme FASTSIM to save the computation time.
Journal ArticleDOI
Determination of the wheel rail contact patch in semi-Hertzian conditions
J B Ayasse,H Chollet +1 more
TL;DR: In this paper, a semi-Hertzian contact model for wheel rail contact in railways or roller bearing applications is presented. The model is based on the interpenetration of the two underformed bodies' profiles.
Journal ArticleDOI
Development of elastic force model for wheel/rail contact problems
TL;DR: In this article, a new formulation for the wheel/rail contact problem based on the elastic force approach is presented, which allows for multiple points of contact between the wheel and the rail by using an optimized search for all possible contact points.
Journal ArticleDOI
Wheel–rail contact models for vehicle system dynamics including multi-point contact
Jerzy Piotrowski,H. Chollet +1 more
TL;DR: In this paper, the authors propose to replace a multi-point contact by a set of ellipses to calculate the non-elliptical, multiple contact patches and creep forces online, during integration of the model.