Fatigue reliability assessment of turbine discs under multi‐source uncertainties
Fatigue reliability assessment of turbine discs under multi‐source uncertainties
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DOI：
10.1111/ffe.12772
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发表时间：
2018-06
影响因子：
3.7
通讯作者：
Shun‐Peng Zhu;Qiang Liu;Jian-ping Zhou;Zheng-Yong Yu
中科院分区：
文献类型：
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作者：
Shun‐Peng Zhu;Qiang Liu;Jian-ping Zhou;Zheng-Yong Yu
航空发动机的热段部件，如高压涡轮机（HPT）盘，通常在复杂载荷和多源不确定性的耦合下运行。这些不确定性对高压涡轮盘结构响应的影响应考虑到其疲劳寿命和可靠性评估。在这项研究中，疲劳可靠性分析的概率框架，建立了有限元模拟与拉丁超立方抽样量化的材料变异性和载荷变化的影响。特别地，材料响应的可变性的特征在于结合Chaboche本构模型与Fatemi-Socie准则。对某高压涡轮盘进行疲劳可靠性和灵敏度分析，结果表明：基本变量的离散性 在进行疲劳可靠性分析时，必须考虑。此外，所提出的框架的基础上的强度损伤干扰提供了更合理的相关性，其现场飞行数比载荷寿命干扰之一。
Hot section components of aircraft engines like high pressure turbine (HPT) discs usually operate under complex loadings coupled with multi‐source uncertainties. The effect of these uncertainties on structural response of HPT discs should be accounted for its fatigue life and reliability assessment. In this study, a probabilistic framework for fatigue reliability analysis is established by incorporating FE simulations with Latin hypercube sampling to quantify the influence of material variability and load variations. Particularly, variability in material response is characterized by combining the Chaboche constitutive model with Fatemi‐Socie criterion. Results from fatigue reliability and sensitivity analysis of a HPT disc indicated that dispersions of basic variables must be taken into account for its fatigue reliability analysis. Moreover, the proposed framework based on the strength‐damage interference provides more reasonably correlations with its field number of flights rather than the load‐life interference one.