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Technical Briefs

Analysis of Wheel/Rail Contact Geometry on Railroad Turnout Using Longitudinal Interpolation of Rail Profiles

[+] Author and Article Information
Hiroyuki Sugiyama

Department of Mechanical Engineering, Tokyo University of Science, Tokyo 102-0073, Japanhsugiy1@rs.kagu.tus.ac.jp

Yoshimitsu Tanii, Ryosuke Matsumura

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

J. Comput. Nonlinear Dynam 6(2), 024501 (Oct 20, 2010) (5 pages) doi:10.1115/1.4002342 History: Received December 28, 2009; Revised February 20, 2010; Published October 20, 2010; Online October 20, 2010

In this investigation, a numerical procedure that can be used for the analysis of wheel/rail two-point contact geometries in turnout sections is developed. In turnout section, the tongue rail changes its shape along the track. Cross-sectional shapes of the tongue rail, therefore, need to be generated by interpolations along the track and these profiles are used to determine the location of contact points for the given location of wheelset. Several numerical examples are presented in order to demonstrate the use of the procedure developed in this investigation and the effect of wheel profiles on contact geometry in turnout section is discussed.

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Figures

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Figure 1

Coordinate system of wheelset

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Figure 2

Coordinate system of rail

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Figure 3

Interpolation of rail profile

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Figure 4

Three-layer spline (7)

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Figure 5

Two-point contact

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Figure 7

Simple turnout and cross-sections

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Figure 8

Interpolated rail profiles and derivatives

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Figure 9

Interpolated shapes (stock and tongue rails)

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Figure 10

Wheel/rail two-point contact in turnout section

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