Failure Analysis on HPT Blade of CFM56-7B
The high pressure turbine blade of CFM56-7B engine is risky to crack,its failure modes include transition zone crack,shank rupture,min-neck damage,edge of contact and split-shelf clog,which could be modeled and simulated by finite element method.The root cause of crack is found by aforementioned simulation and electronic speculum to modify the blade design.And the reliability of blades could be calculated by Weibull distribution to get soft-time limitation in replace of related blades,in which the Weibull parameter would be estimated with Johnson median rank time method and Bayes estimation method for the censored data.
Transition zone Edge of contact Electronic speculum Weibull distribution Parameter estimation Finite element method Johnson median rank time method Bayes estimation
Gao Yu Chen Xin-feng Li Nan
M&E Division,China Academy of Civil Aviation Science and Technology,Beijing,100028,China. R&D Division,China Academy of Civil Aviation Science and Technology,Beijing,100028,China.
国际会议
沈阳
英文
2116-2119
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）