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On the Double-Point Wheel-Rail Contact Situation Using Simplified Constraints. A Preliminary Study

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Advances in Dynamics of Vehicles on Roads and Tracks (IAVSD 2019)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

In this work a smoothed computation of the two-point wheel-rail contact scenario using the simplified Knife-edge Equivalent Contact constraint method (KEC-method) is presented. The procedure that considers the continuous KEC solution of the wheel-rail contact with equivalent profiles (equivalent wheel and single-point rail) proposes a smoothed transition between tread and flange contact in order to reduce the numerical instabilities that abrupt forces in flange may produce when flange contact occurs. This smoothed transition considers a small region in the wheel close to the two-point contact scenario. When contact happens in this region, tread normal contact force is transformed into two normal contact forces: one acting on the wheel tread and the other one acting on the wheel flange where different algorithms for this force transformation are proposed. However, in order to maintain the dynamics of the vehicle, the resultant normal force acting on the wheelsets, which is obtained as a reaction force of the constraint KEC-method, is kept after the force transformation. This procedure is applied to the numerical simulation of a single wheelset and results show that numerical instabilities of the two-point contact scenario using constraints are avoided.

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References

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Acknowledgements

This work is supported by the Spanish Ministry of Science, Innovation and Universities under Project Reference TRA2017-86355-C2-1-R. This support is gratefully acknowledged.

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Authors and Affiliations

  1. Mechanical and Mining Engineering Department, University of Jaén, Avda. de la Universidad s/n, 23700, Linares, Jaén, Spain

    Javier F. Aceituno

  2. Mechanical and Manufacturing Engineering Department, University of Seville, Camino de los Descubrimientos s/n, 41092, Seville, Spain

    José L. Escalona

Authors
  1. Javier F. Aceituno
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  2. José L. Escalona
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Corresponding author

Correspondence to Javier F. Aceituno .

Editor information

Editors and Affiliations

  1. Research and Development, Volvo Car Corporation, Gothenburg, Sweden

    Matthijs Klomp

  2. Research Institute, Driver and Vehicle, Swedish National Road and Transport, Gothenburg, Sweden

    Fredrik Bruzelius

  3. Department of Mechanics and Maritime Sciences, Chalmers University of Technology, Gothenburg, Västra Götalands Län, Sweden

    Jens Nielsen

  4. Department of Mechanics and Maritime Sciences, Chalmers University of Technology, Gothenburg, Sweden

    Angela Hillemyr

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Aceituno, J.F., Escalona, J.L. (2020). On the Double-Point Wheel-Rail Contact Situation Using Simplified Constraints. A Preliminary Study. In: Klomp, M., Bruzelius, F., Nielsen, J., Hillemyr, A. (eds) Advances in Dynamics of Vehicles on Roads and Tracks. IAVSD 2019. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-38077-9_80

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  • DOI: https://doi.org/10.1007/978-3-030-38077-9_80

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-38076-2

  • Online ISBN: 978-3-030-38077-9

  • eBook Packages: EngineeringEngineering (R0)

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