Train tire profile

Railway wheels and axles – Wheels – Wheel tread

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295 311, B60B 1902

Patent

active

055493432

ABSTRACT:
A section of a train wheel tread is formed into a continuous hyperbolic curve to respond asymptotically to changes in the path of a rail, thus, dampening lateral oscillation of the train wheels back and forth across rail. The hyperbolic curve at a minimum extends from a taping line to a wheel lift point. However, for further dampening effects the hyperbolic curve is extended from a fillet section across the taping line toward the field side of the wheel. Two tires having the same hyperbolic profile work in conjunction as a feedback system to dampen lateral oscillation while at the same time saving energy, reducing tire and rail wear.

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J. L. Koffman, "British Rail Adopt New Tire Profiles, Traction & Rolling Stock Engineer", Aug. 1970, pp. 363-365.
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Law, E. H, Transactions of the ASME Journal of Engineering for Industry, Nov., (1974) pp. 1168-1174, "Nonlinear Wheelset Dynamic to Random Lateral Rail Irregularities".
Hedrick, J. Karl, Arslan, A. V., Transactions of the ASME Journal of Dynamic Systems, Measurement, and Control, Sep. (1979), vol. 101, pp. 230-237. "Nonlinear Analysis of Rail Vehicle Forced Lateral Response and Stability".
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Fries, R. H., Cooperrider, N. K., Law E. H., Transactions of the ASME Journal of Dynamic Systems, Measurement, and Control, Dec., (1978), vol. 100, pp. 238-251.

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