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Band Gap Analysis of Improved Point-Supporting Structure for Floating-Slab Track Through Theoretical Model

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Journal of Vibration Engineering & Technologies Aims and scope Submit manuscript

Abstract

Purpose

To improve the vibration-reduction ability of the point-supported floating slab track.

Method

Through theoretical derivation and numerical simulation, an improved Point Support Structure by Local Resonance Type (IPSSbyLRT) designed by the local resonance theory was studied.

Results

(1) The first-order bandgap range of IPSSbyLRT is 51–88 Hz, and the second-order bandgap range is 131–166 Hz. (2) As the elastic modulus of the outer cladding layer increases, the bandwidth of the first-order band gap decreases slightly, the bandwidth of the second-order band gap increases significantly. As the elastic modulus of the inner cladding layer increases, the bandwidth of the first-order band gap increases significantly, the bandwidth of the second-order band gap decreases sharply. (3) The increase in the density of the external vibrator can effectively reduce the second-order band gap start and cut-off frequencies of the structure. The increase in the internal vibrator density can effectively reduce both first- and second-order band gap start and cut-off frequencies of the structure.

Conclusion

Local resonance type floating slab track will be one of the development directions of track vibration-reduction measures in the future.

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Acknowledgements

The present study is sponsored by the National Nature Science Foundation of China (51908428) and the Natural Science Foundation of Shanghai (19ZR1460400). The opinions and conclusions presented in this article are those of the authors and do not necessarily reflect the views of the sponsoring organizations.

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Authors and Affiliations

  1. School of Transportation, Southeast University, Nanjing, 211189, China

    Hao Jin

  2. The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Shanghai, China

    Zheng Li

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  1. Hao Jin
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  2. Zheng Li
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Correspondence to Hao Jin.

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Jin, H., Li, Z. Band Gap Analysis of Improved Point-Supporting Structure for Floating-Slab Track Through Theoretical Model. J. Vib. Eng. Technol. 10, 55–69 (2022). https://doi.org/10.1007/s42417-021-00363-1

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  • DOI: https://doi.org/10.1007/s42417-021-00363-1

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