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Theoretical and experimental studies on the natural frequencies of fastener clips

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Abstract

The clamping force (elastic range) of the clip and the load–frequency-dependent stiffness of the elastic pad were not adequately accounted for the calculation of the natural frequency of the clip. In this paper, the clip's natural frequencies of a DT-III fastener system without and with a train load were first compared and analyzed to investigate the respective effect of the above two factors. Then, a finite element model consistent with the above hammer test conditions was established to calculate the natural frequencies of the clip without and with a train load, and the accuracy of the calculated results was verified by the above hammer test. The results showed clip clamping force and load–frequency-dependent stiffness of elastic pad are two key parameters to calculate the natural frequency of clip. The calculation errors of the natural frequency of the clip without and with a train load were 1.4 and 1.8 Hz by comprehensively considering the above two factors. The real natural frequency of the fastener clip changes dynamically between without and with a train load instead of a fixed value.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant Nos. 51978583), Technology Support Program of Sichuan Province (Grant No. 2021YFSY0061), Sichuan Province Youth Science and Technology Innovation team (No. 2022JDTD0015).

Funding

This research was supported by the National Natural Science Foundation of China (Grant Nos. 51978583), Technology Support Program of Sichuan Province (Grant No. 2021YFSY0061), Sichuan Province Youth Science and Technology Innovation team (No. 2022JDTD0015).

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Authors and Affiliations

  1. MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Meng Xie, Kai Wei, Juanjuan Ren & Ping Wang

  2. School of Civil Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Meng Xie, Kai Wei, Juanjuan Ren & Ping Wang

Authors
  1. Meng Xie
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  2. Kai Wei
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  3. Juanjuan Ren
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  4. Ping Wang
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Contributions

Meng Xie and Kai Wei were responsible for the experimental study. Juanjuan Ren established a finite element model of the fastener system. After Meng Xie and Kai Wei accomplished the draft, Ping Wang helped to improve the manuscript.

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Correspondence to Kai Wei or Juanjuan Ren.

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Xie, M., Wei, K., Ren, J. et al. Theoretical and experimental studies on the natural frequencies of fastener clips. Nonlinear Dyn 111, 5125–5140 (2023). https://doi.org/10.1007/s11071-022-08113-y

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  • DOI: https://doi.org/10.1007/s11071-022-08113-y

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