Research Papers

Wheel∕Rail Two-Point Contact Geometry With Back-of-Flange Contact

[+] Author and Article Information
Hiroyuki Sugiyama

Department of Mechanical Engineering, Tokyo University of Science, Tokyo 102-0073, Japan

Yoshihiro Suda

Institute of Industrial Science, University of Tokyo, Tokyo 153-8505, Japan

J. Comput. Nonlinear Dynam 4(1), 011010 (Nov 12, 2008) (6 pages) doi:10.1115/1.3007976 History: Received May 26, 2007; Revised August 24, 2007; Published November 12, 2008

In this investigation, a numerical procedure that can be used for the analysis of a wheel and rail contact geometry is developed using the constraint contact formulation. The locations of contact points are determined for given lateral and yaw displacements of a wheelset when one-point contact is considered for each wheel, while these two displacements are no longer independent when the two-point contact occurs. A systematic procedure for predicting the flange, as well as the back-of-flange contact points, is developed and used for the two-point contact geometry analysis of a wheel and rail. Numerical results that involve tread, flange, and back-of-flange contacts are presented in order to demonstrate the use of the contact algorithm developed in this investigation. In particular, the back-of-flange contact is discussed for assessing contact configurations of a wheel and a grooved rail in light rail vehicle applications.

Copyright © 2009 by American Society of Mechanical Engineers
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Figure 1

Parametrization of the wheelset

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Figure 2

Parametrization of the rail

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Figure 3

Three-dimensional wheel∕rail contact on the tread and flange

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Figure 6

Dimension of the wheelset and rail

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Figure 7

Rolling radius and contact angle differences ((-○-) Proposed method, (-●-) WHRAIL(5))

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Figure 8

Two-point contact configuration

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Figure 9

Longitudinal locations of contact points on the rail

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Figure 10

Circumferential locations of contact points on the wheels

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Figure 11

Relationship between the lateral and yaw displacements

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Figure 12

Back-of-flange and top-of-flange contacts

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Figure 4

Contact search around the flange

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Figure 5

Back-of-flange contact with the guard rail



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