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A Numerical Study for the Effect of Ski Vibration on Friction

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A Correction to this article was published on 03 May 2019

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Abstract

In ski jump, minimizing the energy loss when sliding down the track is crucial for improving jump performance. In particular, it is essential to reduce the friction between the ice track and the jumping ski, which is typically achieved by properly waxing the ski base according to weather and ice conditions. Additionally, it might be possible to reduce the friction by controlling the vibration of jumping skis as many experiments and numerical analyses have reported that vibration can reduce the friction in both dry and wet conditions. However, they have been done mostly for small, rigid specimens and therefore the results may not be directly applicable to jumping skis because they have unique vibrational modes due to their slenderness and structural flexibilities. Here, we investigate a potential effect of ski vibration on friction using finite element analysis. Finite element beam models for jumping skis are constructed by measuring the geometry and bending stiffness experimentally. We employ a pressure-dependent friction model between the ski base and the ice track derived from the reported experimental data. Various vibration conditions are tested for four jumping ski models with different bending stiffness profiles. Results demonstrate the possibility of friction reduction by designing the bending stiffness profile of a jumping ski that controls its vibrational modes.

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  • 03 May 2019

    The original version of this article unfortunately contained a mistake. Jinsu Gim, Taejoon Jeong and Byungohk Rhee were not listed among the authors.

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Acknowledgements

This research was supported by the Convergent Research Program for Sports Scientification (grant number 2014M3C1B1033983) and the EDucation-research Integration through Simulation On the Net (EDISON) Program (grant number 2014M3C1A6038842) through the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science and ICT.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea

    Yunhyoung Nam & Do-Nyun Kim

  2. Department of Mechanical Engineering, Ajou University, Suwon, Republic of Korea

    Jinsu Gim, Taejoon Jeong & Byungohk Rhee

  3. Institute of Advanced Machines and Design, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea

    Do-Nyun Kim

Authors
  1. Yunhyoung Nam
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  2. Jinsu Gim
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  3. Taejoon Jeong
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  4. Byungohk Rhee
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  5. Do-Nyun Kim
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Correspondence to Do-Nyun Kim.

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The original version of this article was revised: The original version of this article unfortunately contained a mistake. Jinsu Gim, Taejoon Jeong and Byungohk Rhee were not listed among the authors. More details can be found in the correction article.

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Nam, Y., Gim, J., Jeong, T. et al. A Numerical Study for the Effect of Ski Vibration on Friction. Multiscale Sci. Eng. 1, 256–264 (2019). https://doi.org/10.1007/s42493-018-00005-x

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  • DOI: https://doi.org/10.1007/s42493-018-00005-x

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