加速退化试验改进的故障模式影响及危害性分析  

Failure mode effect and critical analysis optimized by the accelerated degradation test

作　　者：陈然[1] 连光耀[1] 孙江生[1] 李会杰[1] 

机构地区：[1]军械工程学院军械技术研究所,河北石家庄050003

出　　处：《西安电子科技大学学报》2017年第3期164-169,共6页Journal of Xidian University

基　　金：国家部委预研资助项目(51327030104)

摘　　要：针对传统方法依赖人工经验,导致故障样本的主观性、盲目性等问题,提出了加速退化试验改进的故障模式影响及危害性分析方法.首先,通过有限元仿真分析识别了受试对象存在的薄弱环节和及退化失效特征;然后,根据加速退化试验,得到了受试对象在相应退化应力下典型的故障模式和发生概率;最后,实现了故障模式影响及危害性的最终分析.实例验证表明,该方法可对传统方法提供有效的补充和修正,进而为测试性验证试验提供更为多样、可靠的备选样本.An improved failure mode effect and critical analysis （FMECA） method optimized by the accelerated degradation test is presented in order to solve the subjectivity and blindness problems caused by the existing FMECA method that relies on manual experience. First, weak links and the properties and degradation failure characteristics of the module could be acquired by finite element simulation analysis. Then the typical failure modes and the occurrence probability could be obtained according to the accelerated degradation test. Finally, the FMECA could he accomplished. Case study shows that the optimized method could provide effective complement and correction for the traditional FMECA, which could provide more diverse and reliable alternative fault samples.

关 键 词：故障模式影响及危害性分析 有限元分析 加速退化试验 外场可更换模块 

分 类 号：TP302.8[自动化与计算机技术—计算机系统结构] V212.4[自动化与计算机技术—计算机科学与技术]