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Volume 38 Issue 6
Jun.  2012
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Journal of Beijing University of Aeronautics and Astronautics  > 2012  >  38(6): 778-782.
Wang Zheng. Time-dependent reliability models of components with rotatory-symmetrical structure[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(6): 778-782. (in Chinese)
Citation: Wang Zheng. Time-dependent reliability models of components with rotatory-symmetrical structure[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(6): 778-782. (in Chinese)
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Time-dependent reliability models of components with rotatory-symmetrical structure

  • National Key Laboratory of Diesel Engine Turbocharging Technology, China North Engine Research Institute, Datong 037036, China

  • Received Date: 17 Mar 2011
  • Publish Date: 30 Jun 2012
    Abstract
  • The failure characteristic of components with rotatory-symmetrical structure and the effect of the number of symmetrical parts on their reliability were analyzed. The probability density function and cumulative distribution function of strength of components with rotatory-symmetrical structure were developed. Then, taking the number of load application and time as its life parameter, respectively, the time-dependent reliability models and failure rate models of components with rotatory-symmetrical structure were derived, which consist of load, strength, the number of symmetrical parts and life parameters. The results show that when strength doesn-t degenerate, the reliability of components with rotatory-symmetrical structure still decreases as the life parameter (namely, the number of load application and time), and the failure rate also decreases as the life parameter. For the components consisted of the identical symmetrical part, its reliability decreases as the number of symmetrical part increases, and its failure rate increases as the number of symmetrical part increases.

     

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