考虑多退化失效和突发失效之间竞争失效的可靠性评估方法  

Reliability Assessment Based on Competition Failure Considering Multi-degradation and Catastrophic Failure

作　　者：刘晓娟[1] 王华伟[1] 徐璇[1] 

机构地区：[1]南京航空航天大学民航学院,南京211106

出　　处：《中国机械工程》2017年第1期7-12,共6页China Mechanical Engineering

基　　金：国家自然科学基金与中国民航局联合基金资助项目(U1233115);国家自然科学基金资助项目(71401073)

摘　　要：提出了考虑多退化失效和突发失效之间竞争失效的可靠性评估方法。由协方差分析了多元退化信息之间的相关性及相关程度,建立多退化失效模式的可靠性评估模型,且选用了多元正态分布来建立模型。构建基于退化量突发失效的条件概率,分析退化失效对突发失效的影响,通过多个退化模式的退化失效与突发失效的联合概率分布函数建立竞争失效的可靠性评估模型。最后以航空发动机的失效数据为例,验证了模型的有效性。A reliability assessment method of the competing failure during multi-degradation failure and the catastrophic failure was proposed. Covariance was used to analyze the dependence and the degree of correlation during multivariate degradation information, reliability assessment model of multi-degradation mode was developed. In addition, multivariate normal distribution was used to establish the model. The conditional probability of catastrophic failure under the degradation data was developed to analyze the effects of degradation failure on catastrophic. Reliability assessment model of competition failure was developed through the joint probability distribution function of multi-degradation mode and catastrophic failure. Finally, an example of the failure data of aero engine verified the effectiveness of proposed method.

关 键 词：多退化失效模式 突发失效 系统可靠性评估 竞争失效 

分 类 号：TB114.3[理学—概率论与数理统计]