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工程设计学报
Chinese Journal of Engineering Design  2009, Vol. 16 Issue (3): 196-199    DOI:
    
Reliability analysis of turbine disk crack propagation life with arbitrary distribution parameters
 JIN  Ya-Juan, ZHANG  Yi-Min, ZHANG  Yan-Lin, WANG  Xin-Gang
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China
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Abstract  Based on Paris-Erdogan crack propagation model, the probabilistic perturbation method and Edgeworth series technique are employed to argue the reliability of a turbine disk with arbitrary distribution parameters when given the first four moment of basic random variables. The fatigue life model of turbine disk is established and the reliability of turbine disk crack propagation life is obtained. The result from the calculation model is close to the one from MonteCarlo simulation. Therefore the result is a valuable reference for reliability design of turbine disk.

Key words： turbine disk      random parameter      crack propagation life      random perturbation      reliability analysis     
Published: 28 June 2009
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JIN Ya-Juan
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Cite this article:

JIN Ya-Juan, ZHANG Yi-Min, ZHANG Yan-Lin, WANG Xin-Gang. Reliability analysis of turbine disk crack propagation life with arbitrary distribution parameters. Chinese Journal of Engineering Design, 2009, 16(3): 196-199.

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https://www.zjujournals.com/gcsjxb/     OR     https://www.zjujournals.com/gcsjxb/Y2009/V16/I3/196


任意分布参数的涡轮盘裂纹扩展寿命可靠性分析

讨论了某型涡轮盘随机参数服从任意分布时的可靠性问题.在基本随机参数前四阶矩已知的情况下,以Pairs-Erdogan裂纹扩展模型为基础,应用随机摄动理论和Edgeworth 级数技术,采用疲劳寿命模型对某型涡轮盘随机参数服从任意分布时的可靠性进行分析,建立了涡轮盘疲劳寿命可靠性分析模型,并求得了涡轮盘裂纹扩展寿命的可靠度.模型计算结果与Monte-Carlo仿真结果非常接近,文章提出的方法对涡轮盘可靠性设计具有一定的参考价值.

关键词： 涡轮盘,  随机参数,  裂纹扩展寿命,  随机摄动,  可靠性分析 
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