某涡轮盘低循环疲劳概率寿命数值模拟

唐俊星; 陆山

某涡轮盘低循环疲劳概率寿命数值模拟

唐俊星,
陆山

西北工业大学动力与能源学院, 西安 710072

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出版历程
- 收稿日期: 2005-07-18
- 修回日期: 2005-12-12
- 刊出日期: 2006-08-28

Numerical simulation of LCF probability life of a turbine disk

School of Engine and Energy, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 针对发动机轮盘疲劳萌生寿命具有较大分散性,且难于准确确定安全寿命边界的特点,基于应变疲劳概率分析模型,以转速、材料属性、盘轴连接销钉孔处过盈量作为随机变量,应用响应面与蒙特卡洛模拟结合,获得某涡轮盘寿命概率分布,并得到可靠度为99.87%的概率寿命,与轮盘试验技术寿命吻合良好。
- 航空、航天推进系统 /
- 涡轮盘 /
- 应变疲劳 /
- 蒙特卡洛法 /
- 响应面法 /
- 可靠性
Abstract: Crack initiation life behaves large scatter which induces inconvenience in the evaluation of the safe boundary in predicting low cycle fatigue(LCF) life of disks.To determine the safety life,a probability model based on strain fatigue was introduced to take into account the random factors such as rotating speed,material property and the interference between pin bolt and pinhole.Then the distribution of the disk fatigue life was acquired through the combination of the response surface method and Monte-Carlo simulation.Finally,the life with reliability level of 99.87% was derived and fitted well with the technical life of the disk based on test evaluation.
- aerospace propulsion system /
- turbine disk /
- strain fatigue /
- Monte Carlo simulation /
- response surface method /
- reliability

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参考文献(8)

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