Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (8): 1133-1137.DOI: 10.12068/j.issn.1005-3026.2016.08.015

• Mechanical Engineering • Previous Articles     Next Articles

Reliability Assessment of Railway Vehicle Gearbox Based on Extension Analysis

LIU Yu-mei1,2, ZHAO Cong-cong1, XIONG Ming-ye3, LU Zheng-xu1   

  1. 1. College of Traffic, Jilin University, Changchun 130022, China; 2. Changchun Railway Vehicle Co., Ltd., Changchun 130062, China; 3.College of Liberal Art and Science, University of Illinois at Urbana-Champaign,Champaign-Urbana 61801,USA.
  • Received:2015-03-11 Revised:2015-03-11 Online:2016-08-15 Published:2016-08-12
  • Contact: LIU Yu-mei
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Abstract: The extension method was adopted to analyze the reliability assessment problems of railway vehicle gearbox during its line operation. The matter-element model of gearbox reliability was studied based on the contained analysis and scalability analysis method of the extenics theory, and the lower/upper reliability targets of the gearbox reliability assessment were set. The proportional hazards models(PHMs) were established based on the component’s operating state, and the particle swarm optimization(PSO) algorithm was used to obtain the parameters of PHMs by means of maximum likelihood estimation. On the basis of parameters evaluation results, the matter-element models of components were established. At last, the reliability of the railway vehicle gearbox was evaluated. The result shows that under current operating state of gearbox, the reliability of the large gear bearingⅠand pinion are relatively lower, which are the main monitoring components in the railway vehicle line operation.

Key words: railway vehicle, gearbox, extenics theory, reliability assessment, proportional hazards model, PSO (particle swarm optimization)

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