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A new direct approach for evaluating the wheel-rail contact stiffness, including surface roughness and hardening effects

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Abstract

Nowadays, the dynamic behavior of rolling stocks is an essential problem. In dynamic simulation, the correct wheel-rail contact modeling is an important task. In this paper, the stiffness of the wheel-rail contact zone is found by a new, direct, and simplified formulation. This subject is developed by applying more details, such as surface roughness based on the surface topography and hardening effects of a real contact problem. These characteristics have not been considered altogether in other similar works. In this work, the contact stiffness and frequency results are obtained for different material properties and verified with analytical and experimental research. It is shown that the presented new direct method with an acceptable accuracy is easier to use than the complicated existing methods. This paper discusses the effects of contact parameter variations on contact stiffness and frequency. For example, it is shown that the contact stiffness decreases by increasing the surface roughness and increases by increasing the strain-hardening factor.

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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  1. School of Railway Engineering, Iran University of Science and Technology, Tehran, 16846-13114, Iran

    Mohammad Amini Sarabia & Parisa Hossein Tehrani

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  1. Mohammad Amini Sarabia
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  2. Parisa Hossein Tehrani
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Correspondence to Parisa Hossein Tehrani.

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Amini Sarabia, M., Hossein Tehrani, P. A new direct approach for evaluating the wheel-rail contact stiffness, including surface roughness and hardening effects. Acta Mech (2024). https://doi.org/10.1007/s00707-024-03904-3

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  • DOI: https://doi.org/10.1007/s00707-024-03904-3

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