摘要
对某出口用飞机铝合金结构件在热带海洋大气环境条件下服役时所发生的腐蚀失效问题,提出了采用故障树分析方法对引起飞机结构件腐蚀失效的各因素进行系统分析和探讨.根据结构件腐蚀失效过程及机理的分析,确定导致结构件腐蚀失效的各个因素,建立以结构件腐蚀失效为顶事件的故障树,通过布尔代数运算得到故障树的各阶最小割集.计算故障树顶事件的发生概率,并对底事件的概率重要度、相对概率重要度进行分析排序,找出引起铝合金结构件发生腐蚀失效的主要因素.分析结果表明飞机服役环境、阳极氧化工艺和选材是导致结构件腐蚀失效的主要因素.针对这些主要因素,提出了相应的改进防护措施.
To analyze corrosion failure of aluminum alloy structures on export airplane used in marine environment,the fault tree analysis was proposed to analyze the erosion factors of aircraft structures.Through investigating and analyzing on failure processes and failure mechanism of structural components of aluminum alloy on airplane,factors which brought on erosion of structural parts were found.Fault tree of corrosion failure was set up and the minimal cut-sets were obtained by Boolean operation,and the top-event occurrence rate was calculated.The probability importance and relative probability importance of bottom events were analyzed and arranged,and then the important bottom events which caused corrosion of aluminum alloy structures were found.Results show that the main factors which caused corrosion of aircraft structures are ocean environment,anodic oxidation and select material.Some improvements with respect to the main factors had been proposed.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2010年第3期299-302,共4页
Journal of Beijing University of Aeronautics and Astronautics
关键词
飞机结构件
腐蚀失效
故障树分析
最小割集
概率重要度
aircraft structure
corrosion failure
fault tree analysis
minimal cut-set
probability importance
