Analysis on mechanical characteristics of welded joint with a new reinforced device in high-speed railway

Hong Xiao, Dongwei Yan, Guangpeng Liu, Haoyu Wang

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Abstract

High-speed railways adopt continuous welded rail to maintain the smoothness and continuity of the rail surface. However, the welded joint became one of the weakest parts. In order to clear the characteristics and mechanical properties of the new reinforced device, a dynamic three-dimensional vehicle-reinforced device-track coupling model is established. The mechanical characteristics of the track structure under high-speed train load were simulated and analyzed. After installing the new reinforced device, the dynamic response and service life of the track structure are obviously improved compared with the unreinforced rail. When the train speed is 300 km/h, the dynamic bending stress at the bottom of rail is reduced by 26.90%, the vertical and lateral acceleration of the rail are reduced by 42.78% and 21.56%, the vertical and lateral displacement of the rail are reduced by 6.36% and 8.67%, and the theoretical service life of the rail is greatly extended.

Original languageEnglish
Pages (from-to)1-15
Number of pages15
JournalAdvances in Mechanical Engineering
Volume12
Issue number10
DOIs
Publication statusPublished - 2020

Keywords

  • dynamic characteristics
  • fatigue life
  • high-speed railway
  • Reinforced device
  • welded joint

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