Abstract
Rails experience contact with a range of wheel profiles that pummel their surface at different points and with different intensities. This work compares two methods for evaluating pummeling analyzes for the wheel-rail interaction: simplified quasi-static model and multibody dynamics simulations. The first is solved with the GIRAFFE program and simulates the interaction of a single wheelset with the rail in a quasi-static approach. In the second, the full dynamics of a railway wagon on a track layout are evaluated using the multibody dynamics simulation programs SIMPACK® and VAMPIRE®. The proposal for a quasi-static model is to reduce the time and computational effort to perform a pummeling analysis and quickly evaluate thousands of cases of wheel-rail contact. Track parameters and vehicle loads of a heavy haul railway are considered for the simulations. The results showed that the quasi-static model has a good correlation with the dynamic models on tangent track sections. For the curved sections, differences were observed in the distribution of pressures due to the absence of creep forces in the quasi-static model. The comparison between the models also showed slightly different results due to the different calculation of contact in each approach. The quasi-static approach reduced the time consuming by at least 73.4% over the multibody approach. Notwithstanding, the proposed model shows to be promising in replacing complete dynamic analysis for time-consuming tasks such as pummeling.
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No datasets were generated or analysed during the current study.
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Acknowledgements
This project is grateful for the support of Vale S.A. through the Wheel-Rail and Wagons Chairs and the CNPq (National Council for Scientific and Technological Development) under grants 304321/2021-4 and 315304/2018-9.
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P.A.P. Pacheco and T.L. Sá developed the models and wrote the first version of the main manuscript. P.A.P. Pacheco and P.G. Ramos developed the dynamic models and run the simulations; T.L. Sá and A. Gay Neto developed the quasi-static modelling; G.F.M. Santos and P.A.P. Pacheco developed the models and analyzed the contact region for dynamic simulation; A.A. Santos and A. Gay Neto defined the objectives and methodology for the research. All authors reviewed the manuscript. A.A. Santos, G.F.M. Santos, and A. Gay Neto are the project managers for this research in their own institutions.
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Pacheco, P.A.P., Ramos, P.G., Sá, T.L. et al. Comparison between quasi-static and multibody dynamic simulations for wheel-rail contact analysis. Multibody Syst Dyn (2024). https://doi.org/10.1007/s11044-024-09979-z
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DOI: https://doi.org/10.1007/s11044-024-09979-z