| 轮盘低周疲劳寿命可靠性分析新方法 |
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| 引用本文： | 陆山,吕文林.轮盘低周疲劳寿命可靠性分析新方法[J].航空学报,1997,18(2):135-138. |
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| 作者姓名： | 陆山 吕文林 |
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| 作者单位： | 西北工业大学７系 |
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| 摘 要： | 从MansonCoffin公式出发, 建立了新的低周疲劳寿命失效临界函数及其对随机变量的导数公式, 并结合概率有限元法求得轮盘低周疲劳寿命的可靠度, 从而解决了采用Landgraf寿命公式的不足。结果表明, 本文所提出的新方法在发动机轮盘应变水平范围更趋合理, 且结果偏安全。
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| 关 键 词： | 低周疲劳寿命 随机有限元法 可靠性 失效临界方程 |
NEW METHOD FOR RELIABILITY ANALYSISOF DISCS'LCF LIFE |
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| Lu Shan,L Wenlin.NEW METHOD FOR RELIABILITY ANALYSISOF DISCS'LCF LIFE[J].Acta Aeronautica et Astronautica Sinica,1997,18(2):135-138. |
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| Authors: | Lu Shan L Wenlin |
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| Institution: | 7th Department, North western Polytechnical University, Xi'an, 710072 |
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| Abstract: | A new method fo r reliability analysis of discs'LCF life is p resented. In the method,a failure crit ical equat ion deduced direct ly from the M ansonCoffin LCF life fo rmulae and itsderivat ivesw ith respect to the random variables are given. By use of p robabilist ic finite elementmethod, a new fo rmulat ion fo r reliability analysis of discs'LCF life is set up. F inally, severalnumerical examp les are given. The comparison betw een the results obtained from the p resentmethod and tho se obtained by use of the method deduced direct ly from L andgraf's LCF life fo rmula demonst rates that the p resent method is mo re reasonable in the p ract ical st rain range ofaeroengine discs and safer reliability results of discs'LCF life can be obtained from it. |
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| Keywords: | LCF life probabilistic FEM reliability failure critical equation |
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