| 同应力多危险部位失效相关轮盘疲劳寿命可靠度分析方法 |
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| 引用本文： | 马双员,陆山.同应力多危险部位失效相关轮盘疲劳寿命可靠度分析方法[J].航空动力学报,2008,23(11):2016-2020. |
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| 作者姓名： | 马双员 陆山 |
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| 作者单位： | 西北工业大学动力与能源学院; |
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| 摘 要： | 提出了考虑失效相关性的同应力多危险部位轮盘应变疲劳寿命町靠度分析方法.引入广义强度和广义应力建立轮盘应变疲劳寿命可靠性模型,采用H-L法计算轮盘单失效部位可靠度.针对发动机轮盘常存在同应力多危险部位的特点,当考虑多失效部位相关性时,采用Hohenbichler M积分法对轮盘疲劳寿命可靠度进行计算.最后通过某轮盘应变疲劳寿命分析说明该方法的有效性.探讨了轮盘失效功能函数相关系数和应变寿命模型中材料随机变量相关系数关系,以及轮盘失效功能函数相关系数和轮盘疲劳概率寿命规律.
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| 关 键 词： | 轮盘 应变寿命 多危险部位 相关性 系统可靠度 |
| 收稿时间： | 2007/10/30 0:00:00 |
| 修稿时间： | 4/7/2008 12:00:00 AM |
Analysis method for the strain fatigue life reliability of a disk concerning failure correlation of multi critical sites in the same stress level |
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| MA Shuang-yuan and LU Shan.Analysis method for the strain fatigue life reliability of a disk concerning failure correlation of multi critical sites in the same stress level[J].Journal of Aerospace Power,2008,23(11):2016-2020. |
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| Authors: | MA Shuang-yuan and LU Shan |
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| Affiliation: | MA Shuang-yuan,LU Shan(School of Power , Energy,Northwestern Polytechnical University,Xi\'an 710072,China) |
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| Abstract: | In order to calculate strain-fatigue life reliability of a disk more accurately,considering the failure correlation of the disc with multi-critical sites in the same stress level,a method for analysis of strain-fatigue life reliability was proposed.A strain-fatigue life reliability interfere model based on generalized strength and generalized stress was set up,and H-L method was used to evaluate the fatigue life reliability at a failure site.As a fan disk usually contains multi critical sites in the same st... |
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| Keywords: | disk strain life multi critical sites correlation system reliability |
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