Analysis method for the strain fatigue life reliability of a disk concerning failure correlation of multi critical sites in the same stress level

MA Shuang-yuan; LU Shan

Chinese

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Analysis method for the strain fatigue life reliability of a disk concerning failure correlation of multi critical sites in the same stress level

更新时间：2026-07-07

- Analysis method for the strain fatigue life reliability of a disk concerning failure correlation of multi critical sites in the same stress level
- Vol. 23, Issue 11, (2008)
- 作者机构：
  
  西北工业大学动力与能源学院,西安,710072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2008
- 稿件说明：
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MA Shuang-yuan, 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]. 2008, 23(11).
DOI：

MA Shuang-yuan, 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]. 2008, 23(11). DOI：

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可靠度分析方法.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HohenbichlerM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.

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 stress level

the strain-fatigue life reliability of the disk concerning multi failure sites correlation was acquired through the Hohenbichler's integral method.Finally

an example of strain-fatigue life analysis of the disk was given to demonstrate the efficiency of the method.The relationship of the correlation coefficient between the failure functions and the correlation coefficient between random variables in the stain-life model is discussed.Also the relationship of the correlation coefficient between the failure functions and the probabilistic fatigue life of the fan disk concerning multi failure sites correlation is illustrated.

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