Articles | Volume 17, issue 1
https://doi.org/10.5194/ms-17-61-2026
https://doi.org/10.5194/ms-17-61-2026
Research article
 | 
04 Feb 2026
Research article |  | 04 Feb 2026

Research on the mechanism of metro wheel high-order polygons affecting sound pressure level

Yu Cao and Jianhui Tian

Cited articles

Cheng, G., He, Y. P., Han, J., Sheng, X. Z., and Thompson, D.: An investigation into the effects of modelling assumptions on sound power radiated from a high-speed train wheelset, Journal of Sound and Vibration, 495, 115910, https://doi.org/10.1016/j.jsv.2020.115910, 2021. 
Desmet, W., Sas, P., and Vandepitte, D.: Numerical acoustics-theoretical manual, LMS International, 1998. 
Han, J.: Research on vibration sound radiation and directivity of train wheels, Master thesis, Southwest Jiaotong University, China, 76 pp., 2012. 
He, Y. P., Wang, X. H., Han, J., Xiao, X. B., and Sheng, X. Z.: Study on the influence of resilient wheels on vibration and acoustic radiation characteristics of suburban railway concrete box girder bridges, Applied Acoustics, 187, 108529, https://doi.org/10.1016/j.apacoust.2021.108529, 2022. 
He, Y. P., Zhou, Q., Xu, F., Sheng, X. Z., He, Y. L., and Han, J.: An investigation into the effect of rubber design parameters of a resilient wheel on wheel-rail noise, Applied Acoustics, 205, 109259, https://doi.org/10.1016/j.apacoust.2023.109259, 2023. 
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Short summary
This paper analyses the effects of several typical polygon amplitudes and orders on wheel sound radiation in metro lines. Concurrently, research has found that there is no linear relationship between wheel–rail forces and polygon amplitudes. Furthermore, the noise reduction mechanism of resilient wheels is thoroughly explained in terms of damping, energy dissipation, vibration isolation, decoupling, and acoustic impedance characteristics. 
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