Abstract: The effects of structure elastic deformations of wheelset and
track on creep forces of wheel and rail are investigated. Finite
element method is used to calculate the influence coefficients
expressing the relations between structure elastic deformations
of wheelset and track and the corresponding loads in the rolling
direction and the lateral direction of wheelset, respectively.
The influence coefficients of wheelset and track are used to
revise some of the influence coefficients obtained with the
formula of Bossinesq and Cerruti in Kalker's theory of
three-dimensional elastic bodies in rolling contact with non-Hertzian
form. The theory of Kalker and the modified theory of Kalker are
respectively employed to analyze creep forces of wheelset and
track. The numerical results obtained show a great influence of
structure elastic deformations of wheelset and track on the
creep forces. Therefore it is not reasonable that wheel and rail
are treated as elastic half space in the analysis of wheel and
rail in rolling contact, and the present theories of rolling
contact based on the assumption of elastic half space need to be
further improved.
Key words: Structure
deformation Wheelset/rail Creepage Creep force Rolling contact
*
This project
is supported by National Natural Science Foundation of China (59935100).
Manuscript received on April 24, 2000; revised manuscript June 30, 2000
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