自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 8    August 2018

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Fatigue life evaluation on key components of high-speed railway catenary system
QI Guang-feng(戚广枫), XIAO Xiao-hui(肖晓晖), ZHAO Hui(赵慧), CHEN Jian-fang(陈建芳)

School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China

Abstract:The fatigue load spectrum and operation life evaluation of key components in the catenary system under the high speed train running condition were investigated. Firstly, based on the catenary model and pantograph model, the couple dynamic equations of pantograph–catenary were built with the Lagrange’s method; then the dynamic contact force was obtained by the Newmark method at the train speeds of 250, 280 and 300 km/h, respectively. Secondly, the finite element model (FEM) of one anchor section’s catenary was built to analyze its transient response under the contact force as train running; then the loading time history of messenger wire base, steady arm, registration tube, oblique cantilever, and straight cantilever were extracted. Finally, the key components’ fatigue spectrum was carried out by the rain-flow counting method, and operation life was estimated in consideration of such coefficients, such as stress concentration, shape and dimension, surface treatment. The results show that the fatigue life of the catenary system reduces with the increasing of train speed; specifically, the evaluated fatigue life of the steady arm is shorter than other components.

 

Key words: fatigue spectrum; fatigue life evaluation; pantograph–catenary’s contact force; high-speed railway

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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