• 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 29 Issue 1
Jan.  2016
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Article Contents
YAN Qixiang, LI Bin, ZHANG Meng, HE Chuan, YANG Wenbo, GENG Ping. Numerical Analysis of Train Impact Load with Finite Element Method[J]. Journal of Southwest Jiaotong University, 2016, 29(1): 1-7. doi: 10.3969/j.issn.0258-2724.2016.01.001
Citation: YAN Qixiang, LI Bin, ZHANG Meng, HE Chuan, YANG Wenbo, GENG Ping. Numerical Analysis of Train Impact Load with Finite Element Method[J]. Journal of Southwest Jiaotong University, 2016, 29(1): 1-7. doi: 10.3969/j.issn.0258-2724.2016.01.001

Numerical Analysis of Train Impact Load with Finite Element Method

doi: 10.3969/j.issn.0258-2724.2016.01.001
  • Received Date: 17 Dec 2014
  • Publish Date: 25 Jan 2016
  • In order to obtain the train impact load on shield tunnel to investigate the dynamic responses of shield tunnel segment under train impact load, a 3D numerical analysis model for train formation was established to obtain the time-history curves of train impact force at different impact velocities, train formations and oblique impact angles. The maximum train impact force and impact duration as functions of impact velocity and impact angle were researched. Based on the representative time-history curves, the dynamic responses of shield tunnel with different thickness double lining caused by train impact load were investigated. The research result shows that when train formation is certain, the maximum train impact force increases with the increases of impact velocity and impact angle; when impact angle is larger than 7.5, impact duration extends with the increase of impact velocity. From different times at which the maximum train impact force appears, the time-history curves of train impact force can be divided into two kinds of characteristic curve, and the first kind of characteristic curve with the maximum impact force appearing at the impact moment is in accordance with the Gauss multiple peak fitting formula, and 10 parameters can be used to achieve its approximate fitting. To increase secondary lining thickness can effectively reduce the dynamic responses of external segment lining under train impact load such as stress, velocity and acceleration as well as tension and compression damage zones.

     

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