• 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 25 Issue 2
Mar.  2012
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Article Contents
LI Peigang, LIU Xueyi, HAO Yuanxing. Damping Characteristics of Ballast Mat on Culvert[J]. Journal of Southwest Jiaotong University, 2012, 25(2): 192-197. doi: 10.3969/j.issn.0258-2724.2012.02.004
Citation: LI Peigang, LIU Xueyi, HAO Yuanxing. Damping Characteristics of Ballast Mat on Culvert[J]. Journal of Southwest Jiaotong University, 2012, 25(2): 192-197. doi: 10.3969/j.issn.0258-2724.2012.02.004

Damping Characteristics of Ballast Mat on Culvert

doi: 10.3969/j.issn.0258-2724.2012.02.004
  • Received Date: 15 May 2011
  • Rev Recd Date: 22 Sep 2011
  • Publish Date: 25 Apr 2012
  • In order to provide a theoretical basis for the design and optimization of ballast mat on railway culvert, a vertical coupling dynamical model for a vehicle-track-culvert system was established based on the wheel-rail coupling dynamics theory and the finite element method. LS-DYNA, a large-scale dynamical analyzing program, was used to analyze the time-frequency characteristics of dynamic responses of vehicle, track and culvert with and without using the vibration mitigation measure of ballast mat. In addition, the proper rigidity of the ballast mat was investigated. The results show that the adoption of the vibration mitigation measure does not aggravate wheel-rail dynamic interaction and affect the running safety of trains. Furthermore, the measure can evidently decrease the dynamic response of culvert, while rarely influence rail vibration. It has a certain damping effect on the vibration of sleeper, but has a negative influence on ballast vibration. The proper rigidity of ballast mat is suggested to be from 50 to 100 MPa/m.

     

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