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Structural safety evaluation of a subway bolster based on numerical simulation and experimental test

  • Jiexin HuEmail author
  • Liyang Xie
  • Longxi Liu
  • Haiyang Yu
  • Sagir Tukur Isah
Technical Paper
  • 35 Downloads

Abstract

The structural safety of a subway bolster is studied by fatigue strength testing and numerical simulation. A novel approach is proposed to determine the loading scheme in the fatigue test. This method identifies the loads accurately and allows for efficient yet economical fatigue test. Full-scale fatigue test of the bolster is carried out up to 1 × 107 load cycles under normal atmospheric conditions. The finite element model is validated based on the stresses measured by strain gauges. The fatigue life of the bolster is evaluated by Goodman diagram and nondestructive test since it is modeled as a series system of weak points. The results demonstrate that this bolster satisfies the structural safety requirement and its fatigue life is more than 1 × 107 load cycles with 90% reliability.

Keywords

Subway bolster Full-scale fatigue test Equivalent method Series system Penetration detection 

Notes

Acknowledgements

The authors gratefully acknowledge the financial support provided by the Natural Science Foundation of China (Grant No. 51335003) and the Collaborative Innovation Center of Major Machine Manufacturing in Liaoning, China. The authors sincerely thank also the Wei Yin and Yanmao Liu at the Beijing Institute of Structure & Environment Engineering for their help and support in conducting the experiments.

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  1. 1.Institute of Modern Design and Analysis, College of Mechanical Engineering & AutomationNortheastern UniversityShenyangChina
  2. 2.Key Laboratory of Vibration and Control of Aero-Propulsion SystemsNortheastern UniversityShenyangChina
  3. 3.CRRC Qingdao Sifang Co. LtdQingdaoChina

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