• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 31 Issue 5
Oct.  2018
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Article Contents
SHENG Xi, ZHAO Caiyou, WANG Ping, CHEN Junhao, WEI Xiao. Effects of Fastener Stiffness of Monolithic Bed Track on Vertical Rail Sound Power Characteristics[J]. Journal of Southwest Jiaotong University, 2018, 53(5): 928-936, 1094. doi: 10.3969/j.issn.0258-2724.2018.05.008
Citation: SHENG Xi, ZHAO Caiyou, WANG Ping, CHEN Junhao, WEI Xiao. Effects of Fastener Stiffness of Monolithic Bed Track on Vertical Rail Sound Power Characteristics[J]. Journal of Southwest Jiaotong University, 2018, 53(5): 928-936, 1094. doi: 10.3969/j.issn.0258-2724.2018.05.008

Effects of Fastener Stiffness of Monolithic Bed Track on Vertical Rail Sound Power Characteristics

doi: 10.3969/j.issn.0258-2724.2018.05.008
  • Received Date: 07 Jun 2017
  • Publish Date: 01 Oct 2018
  • To study the effects of fastener stiffness of the monolithic bed track on vertical rail sound power characteristics, the plane half-track model was built and the spectral element method was utilised to obtain rail mobility. A periodic track-substructure model was also built, and the spectral transfer matrix method was utilised to obtain the track decay rate. Combining the results of both rail mobility and track decay rate, the power level of rail sound under unit harmonic point excitation was calculated, and the effects of fastener stiffness on the relative rail sound power level were investigated. The results show that the power level of rail sound increases with the increase in the frequency in the low-medium frequency range. The power level of rail sound has a peak at the centre frequency of 800 Hz in the one third octave band. With the decrease in fastener stiffness, the power level of rail sound increases, which is more obvious in frequency range under 400 Hz. The level is increased more significantly when the stiffness gets a larger decrease. The rail sound power level mostly increases at the rail bending resonance frequency because the rail mobility amplitude increases and the track decay rate decreases deeply.

     

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