Volume 21 Issue 4
Aug.  2006
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LU Xiao-yan, LU Shan. Life scatter factor method based on the kth order experimental life with logarithm normal distribution[J]. Journal of Aerospace Power, 2006, 21(4): 738-740.
Citation: LU Xiao-yan, LU Shan. Life scatter factor method based on the kth order experimental life with logarithm normal distribution[J]. Journal of Aerospace Power, 2006, 21(4): 738-740.

Life scatter factor method based on the kth order experimental life with logarithm normal distribution

  • Received Date: 2005-07-20
  • Rev Recd Date: 2006-04-18
  • Publish Date: 2006-08-28
  • For the needs of the life scatter factors under different conditions to assess the engine component lives,in this paper,the theoretical formulas of the life scatter factors based on the arbitrary kth order experimental life of a small sample with logarithm normal distribution were deduced.Life scatter factors were given with the confidence of 0.95,the reliability of 0.9987 and the standard deviation of logarithm normal distribution 0.13.The life scatter factors based on the worst experimental lives fit well with those in the published literatures.The life scatter factors based on the best experimental lives are more reasonable than those in the literatures.Using the formulae given in the paper,the life scatter factors can be obtained with any given confidence,reliability and standard deviation of the logarithm normal distribution,which can be used to assess component lives in engineering application.

     

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