| 从疲劳试验寿命到结构安全寿命 |
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| 引用本文： | 陈志伟. 从疲劳试验寿命到结构安全寿命[J]. 航空学报, 1991, 12(8): 443-446 |
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| 作者姓名： | 陈志伟 |
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| 作者单位： | 空军航空工程研究所 |
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| 摘 要： | 1.可靠度与寿命分布分散系数 先考虑固定试验条件下的寿命分散,将疲劳寿命T这一随机变量的概率分布函数记为F(t),其密度函数为f(t),那么在某个时刻t_R,结构可靠度(即存活概率)R为
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| 关 键 词： | 疲劳试验 疲劳寿命 疲劳分散系数 可靠性 |
FROM FATIGUE TEST LIFE TO STRUCTURE SAFE LIFE |
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| Aeronautical Engineering research Institute Chen Zhiwei. FROM FATIGUE TEST LIFE TO STRUCTURE SAFE LIFE[J]. Acta Aeronautica et Astronautica Sinica, 1991, 12(8): 443-446 |
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| Authors: | Aeronautical Engineering research Institute Chen Zhiwei |
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| Affiliation: | Aeronautical Engineering research Institute Chen Zhiwei |
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| Abstract: | According to Chinese military specification a suitable fatigue life scatter factor must be used in determining aircraft safe life from fatigue test life. The relationship between the reliability and the life distribution scatter factor has been discussed. The difference between the life distribution scatter factor and the specification life scatter factor has been pointed out. The concept of spectrum variation factor has been emphasized. It is argued that the specification fatigue life scatter factor should be the product of the life distribution scatter factor and the spectrum variation factor. Determination of structure safe life from fatigue test results of used structures has also been considered. Two points are of significance: when converting used time to fatigue test life the time should be reduced instead of being increased, different specification fatigue life scatter factors should be chosen for service time and test time. |
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| Keywords: | fatigue test fatigue life fatigue life scatter factor reliability |
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