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| Whole Machine Acceleration Factor Based on Weak Links |
| Received:July 11, 2018 Revised:March 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.03.001 |
| KeyWord:storage life accelerating factor weak link |
| Author | Institution |
| XU Ru-yuan |
1. School of Reliability and Systems Engineering, Beihang University, Beijing , China |
| YUAN Hong-jie |
1. School of Reliability and Systems Engineering, Beihang University, Beijing , China |
| LI Peng |
2. China Ship Development and Design Center, Wuhan , China |
| LI Pei-chang |
2. China Ship Development and Design Center, Wuhan , China |
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| Abstract: |
| Objective To give the formula for the relationship between the acceleration factor of the whole machine and the acceleration factor of the weak link when the storage life of the weak ring is subject to the exponential distribution or to the Weibull distribution with the same shape parameters, and give the whole machine acceleration factor value range when the shape parameters are different. Methods Each weak link was treated as a series system. When degrees of reliability were different, the relationship between normal stress and the storage life of the system under accelerated stress was used to calculate the entire acceleration factor or to give the range of acceleration factors. Results Based on the data of different weak links, the calculation method for the acceleration factor or range of the complete machine was summarized. Conclusion When the weak link exists in the system and the life of the weak link obeys a certain distribution, the range of the acceleration factor or acceleration factor of the complete machine could be calculated by proposed method. |
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