摘要
为获得航空发动机关键件的最大安全使用寿命,在国际航空领域开发了多种寿命评定方法。针对国外军、民用航空发动机通用规范对关键件的安全性要求,深入分析了5种定寿方法和基于裂纹扩展寿命、改进的统计方法、风险评估等方向研究发展起来的3种关键件延寿方法的原理、使用范围、使用条件以及安全性等问题。根据假设的轮盘试验结果,采用预定安全循环寿命法计算了轮盘的安全寿命,并分别运用改进的统计法和简化的风险模型进行了轮盘延寿的计算和分析。
A variety of life assessment methods were investigated in international aviation field to obtain maximum safe service life of the aeroengine critical parts. Five life deciding methods and the principle, service area, service condition and safety of three life extending method based on crack extending life, improved statistical method and risk assessment were analyzed deeply against military and commercial aeroengine general specification for safety requirements of critical parts based on the assumed rig test results. The disk safe life was calculated by the method of the predicted cyclic life, and the life extending of the disk was predicted and analyzed by the improved statistical method and the simplified risk model.
出处
《航空发动机》
2013年第5期60-65,共6页
Aeroengine
关键词
寿命评定
定寿
延寿
航空发动机
关键件
改进统计法
风险模型
life assessment
life deciding
life extending
aeroengine
critical parts
improved statistical method
risk model
