Properties of wheel/rail longitudinal creep force due to sinusoidal short pitch corrugation on railway rails

L. Ren, G. Xie, S. D. Iwnicki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The periodic wear on rails with wavelengths between 20 mm and 100 mm is called short pitch corrugation and the state of the wheel/rail rolling contact with short pitch corrugation is highly non-steady. This paper focuses on characteristics of wheel/rail longitudinal creep forces due to sinusoidal short pitch corrugation on the rail based on Kalker's variational method. It is found that longitudinal creep forces from a nonsteady-state model have decreased amplitudes and phase lags compared with the results from the steady state theory. A system identification method is used to analyze the properties of longitudinal creep force. For sinusoidal short-pitch corrugations of a similar depth, the fluctuating component of the longitudinal creep force can be described using a transfer function of a dimensionless frequency defined as the ratio of the semi-axis length of the contact patch to the wavelength of the short-pitch corrugation. Finally transfer functions are used to calculate the non-steady longitudinal creep forces under multi-wavelength short pitch corrugations and results are in good agreement with those obtained from the variational method.
LanguageEnglish
Pages73-81
Number of pages9
JournalWear
Volume284-285
Early online date1 Mar 2012
DOIs
Publication statusPublished - 25 Apr 2012
Externally publishedYes

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rails
wheels
Rails
Wheels
Creep
transfer functions
Wavelength
Transfer functions
wavelengths
system identification
Identification (control systems)
time lag
Wear of materials

Cite this

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title = "Properties of wheel/rail longitudinal creep force due to sinusoidal short pitch corrugation on railway rails",
abstract = "The periodic wear on rails with wavelengths between 20 mm and 100 mm is called short pitch corrugation and the state of the wheel/rail rolling contact with short pitch corrugation is highly non-steady. This paper focuses on characteristics of wheel/rail longitudinal creep forces due to sinusoidal short pitch corrugation on the rail based on Kalker's variational method. It is found that longitudinal creep forces from a nonsteady-state model have decreased amplitudes and phase lags compared with the results from the steady state theory. A system identification method is used to analyze the properties of longitudinal creep force. For sinusoidal short-pitch corrugations of a similar depth, the fluctuating component of the longitudinal creep force can be described using a transfer function of a dimensionless frequency defined as the ratio of the semi-axis length of the contact patch to the wavelength of the short-pitch corrugation. Finally transfer functions are used to calculate the non-steady longitudinal creep forces under multi-wavelength short pitch corrugations and results are in good agreement with those obtained from the variational method.",
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author = "L. Ren and G. Xie and Iwnicki, {S. D.}",
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Properties of wheel/rail longitudinal creep force due to sinusoidal short pitch corrugation on railway rails. / Ren, L.; Xie, G.; Iwnicki, S. D.

In: Wear, Vol. 284-285, 25.04.2012, p. 73-81.

Research output: Contribution to journalArticle

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AU - Xie, G.

AU - Iwnicki, S. D.

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Y1 - 2012/4/25

N2 - The periodic wear on rails with wavelengths between 20 mm and 100 mm is called short pitch corrugation and the state of the wheel/rail rolling contact with short pitch corrugation is highly non-steady. This paper focuses on characteristics of wheel/rail longitudinal creep forces due to sinusoidal short pitch corrugation on the rail based on Kalker's variational method. It is found that longitudinal creep forces from a nonsteady-state model have decreased amplitudes and phase lags compared with the results from the steady state theory. A system identification method is used to analyze the properties of longitudinal creep force. For sinusoidal short-pitch corrugations of a similar depth, the fluctuating component of the longitudinal creep force can be described using a transfer function of a dimensionless frequency defined as the ratio of the semi-axis length of the contact patch to the wavelength of the short-pitch corrugation. Finally transfer functions are used to calculate the non-steady longitudinal creep forces under multi-wavelength short pitch corrugations and results are in good agreement with those obtained from the variational method.

AB - The periodic wear on rails with wavelengths between 20 mm and 100 mm is called short pitch corrugation and the state of the wheel/rail rolling contact with short pitch corrugation is highly non-steady. This paper focuses on characteristics of wheel/rail longitudinal creep forces due to sinusoidal short pitch corrugation on the rail based on Kalker's variational method. It is found that longitudinal creep forces from a nonsteady-state model have decreased amplitudes and phase lags compared with the results from the steady state theory. A system identification method is used to analyze the properties of longitudinal creep force. For sinusoidal short-pitch corrugations of a similar depth, the fluctuating component of the longitudinal creep force can be described using a transfer function of a dimensionless frequency defined as the ratio of the semi-axis length of the contact patch to the wavelength of the short-pitch corrugation. Finally transfer functions are used to calculate the non-steady longitudinal creep forces under multi-wavelength short pitch corrugations and results are in good agreement with those obtained from the variational method.

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