Service Life Supervision for Aircraft Structures under
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摘要: 提出了一种腐蚀条件下飞机结构使用寿命监控的方法,以一般环境下疲劳定寿结论和预期日历寿命指标为前提,考虑地面停放预腐蚀和空中腐蚀疲劳的影响,综合腐蚀条件下疲劳寿命监控和日历寿命指标控制,通过建立监控目标函数,对飞机结构的首翻、大修和总寿命进行监控,保证飞机的合理使用和适时大修,并考虑了飞机在服役过程中转场情况.给出了一个计算实例.Abstract: A method for supervising the service life of aircraft structures under corrosive environment was developed. Based on the evaluation results of fatigue life at room temperature and in the air and the expected calendar life index, considering the influence of pre-corrosion under ground environment and the corrosion fatigue during flight, an objective function was established to supervise the inspection threshold, overhaul intervals and total life. Fatigue life supervision and calendar life supervision were unified by this function. In addition, significant corrosive environment change was considered. As an example, a practical supervising process was given to demonstrate the application of this method.
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Key words:
- corrosion /
- fatigue life /
- service life /
- calendar life /
- supervision
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[1] 刘文, 李玉海,贾国荣. 腐蚀条件下飞机结构使用寿命评定与监控方法研究[J]. 北京航空航天大学学报,1996,22(3):259~263 Liu Wenting,Li Yuhai,Jia Guorong. Evalution and supervision of service life for aircraft structures under corrosive condition[J].Journal of Beijing University of Aeronautics and Astronautics,1996,22(3):259~263(in Chinese) [2] 刘文,蒋冬滨. 飞机结构关键危险部位加速腐蚀试验环境谱研究[J]. 航空学报,1998,19(4):435~438 Liu Wenting,Jiang Dongbin.Study on accelerated corrosion test environment spectrum for critical area[J]. Acta Aeronautica Et Astronautica Sinica,1998,19(4):435~438(in Chinese) [3] 张 栋. 确定飞机机体日历寿命的方法[J]. 航空学报,1999,20(6):558~561 Zhang Dong.Determination method for calendar life of aircraft[J]. Acta Aeronautica Et Astronautica Sinica,1999,20(6):558~561(in Chinese) -
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