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密集编队中飞机发动机的疲劳损伤差异
引用本文:程礼,张海威,王利敏. 密集编队中飞机发动机的疲劳损伤差异[J]. 航空动力学报, 2010, 25(3): 587-591
作者姓名:程礼  张海威  王利敏
作者单位:西安交通大学机械工程学院机械制造系统工程国家重点实验室,西安,710049;空军工程大学工程学院,西安,710038;空军工程大学工程学院,西安,710038
基金项目:国家高技术研究发展计划(863计划),维修预研基金 
摘    要:选取典型密集编队飞行任务,利用实测飞行数据,研究了在飞行动作几乎完全相同的条件下飞机发动机疲劳损伤的差异.经过二次雨流法统计循环次数和线性累积损伤理论折合到标准循环,得出了密集编队中长、僚机因位置不同而造成的发动机疲劳损伤的差异及其统计规律,发现疲劳损伤差异分布为威布尔分布,单机差异一般为2~4倍,最大可以达到9~10倍.进一步揭示了发动机疲劳载荷/损伤的分散性和单机疲劳寿命监控的必要性. 

关 键 词:航空发动机  编队飞行  疲劳损伤  统计规律
收稿时间:2009-03-07
修稿时间:2009-07-08

Fatigue damage of aero-engine in intensive formation flying
CHENG Li,ZHANG Hai-wei and WANG Li-min. Fatigue damage of aero-engine in intensive formation flying[J]. Journal of Aerospace Power, 2010, 25(3): 587-591
Authors:CHENG Li  ZHANG Hai-wei  WANG Li-min
Affiliation:1.State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China2.The Engineering Institute, Air Force Engineering University, Xi'an 710038, China
Abstract:Using actual data in typical intensive formation flying, the variance between different aero-engines in almost the same flying conditions was researched. Aero-engine fatigue variance and its statistical rules due to different positions of the chief and the wing aircraft can be elicited, after the data were converted to the standard cycle by quadratic rainflow counting algorithm and the Miner damage accumulation. It is found that it accords with Weibull distribution, namely, single aircraft variance can reach 2~4 times and the maximal variance can reach 9~10 times because of the same reason. Furthermore, the variance of aero-engine fatigue load/ damage and the necessity of single aircraft life monitoring are revealed.
Keywords:aero-engine  formation flying  fatigue damage  statistical rules
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