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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 98
PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 71

Reliable Stress Predictions for the Design of High Speed Trains

S.S. Ding1, L.F. Jin2, M. Gong1, A.Q. Tian1 and Z. Zhang2

1CSR Qingdao Sifang Locomotive & Rolling Stock Co., Ltd., Qingdao, China
2State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, China

Full Bibliographic Reference for this paper
S.S. Ding, L.F. Jin, M. Gong, A.Q. Tian, Z. Zhang, "Reliable Stress Predictions for the Design of High Speed Trains", in J. Pombo, (Editor), "Proceedings of the First International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 71, 2012. doi:10.4203/ccp.98.71
Keywords: high speed train, finite element method, IIW recommendation.

Summary
Reliable stress prediction is very important in the design of high speed trains to ensure safety. It is necessary to study the predicted stresses in the regions of welding or stress concentration. Therefore, a recommendation from the International Institute of Welding (IIW) [1] was used and modified to reliably predict stresses in the body of the high speed train. The results obtained can be summarized as follows:
  1. The hot spot stresses based on the interpolation of the von Mises stresses can be obviously decreased by comparison with the computational results from a finite element analysis and the results become much closer to the experimental values.
  2. The von Mises stress of the investigated train window with a fine mesh is higher than the one with a coarse mesh for all the cases studied. Meanwhile, the stress distributions and the locations of the maximum stresses in the window with different mesh are similar.
  3. The difference between the two results with different mesh sizes becomes more obvious when the stress gradient at the hot points becomes higher.

References
1
A.F. Hobbacher, "The new IIW recommendations for fatigue assessment of welded joints and components - A comprehensive code recently updated", International Journal of Fatigue, 31, 50-58, 2009. doi:10.1016/j.ijfatigue.2008.04.002

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