基于改进综合因子分配法的行星减速器可靠性分配  

RELIABILITY ALLOCATION OF PLANETARY REDUCER BASED ON ADVANCED INTEGRATED FACTORS ALLOCATION METHOD

作　　者：贾硕国 剡昌锋[1] 张珂 魏永峭 安宗文[1] JIA ShuoGuo;YAN ChangFeng;ZHANG Ke;WEI YongQiao;AN ZongWen(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Xuzhou XCMG Mining Machinery Co.,Ltd.,Xuzhou 221000,China)

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]徐州徐工矿业机械有限公司,徐州221000

出　　处：《机械强度》2023年第5期1141-1151,共11页Journal of Mechanical Strength

基　　金：国家重点研发计划项目(2019YFB2006402)资助。

摘　　要：系统可靠性设计在很大程度上决定了某轮毂驱动系统中行星减速器的使用寿命,针对研发阶段可靠性分配结果确信度不高和分配深度不够的问题,基于改进失效模式影响与危害性分析(Failure Mode Effects and Criticality Analysis,FMECA)和次序统计量理论,提出了一种行星减速器的可靠性分配方法。分析了行星减速器的基本特征,提出了带有失效正相关修正算子的FMECA公式,表征了子系统复杂度和失效发生度随失效相关程度同向变化的特征。基于Gumbel Copula函数和次序统计量理论建立了可靠性分配模型,为行星减速器的零部件分配了可靠性设计指标。对比不同方法得出的子系统可靠性分配权重,结果显示,由于采用了失效正相关修正算子而且从失效敏感环节角度评估了子系统复杂度,提出的方法得到的分配结果确信度更高,并且该方法实现了更深层次的可靠性分配,对提升行星减速器的使用寿命有一定的帮助。The service life of the planetary reducer in a hub drive system largely depends on the system reliability design.Aimed at the problems of lower credibility and inadequate depth in the reliability allocation,based on improved FMECA formulas and order statistics theory,an advanced reliability allocation method of the planetary reducer is proposed.The basic characteristics of the planetary reducer are analyzed,and FMECA formulas with the positive failure correlation modifying operator are presented,which indicate that the subsystem complexity and the failure occurrence change in the same direction as the failure correlation degree,respectively.Simultaneously,based on the Gumbel Copula function and order statistics theory,the reliability allocation model is established to assign reliability design indices to parts of the planetary reducer.By comparing the subsystem reliability allocation weights obtained by different methods,results show that the allocation result of the proposed method is more credible.It will be helpful to accomplish the deeper reliability allocation and improve the service life of the planetary reducer.

关 键 词：综合因子分配法 行星减速器 可靠性分配 失效正相关 修正算子 次序统计量 

分 类 号：N945[自然科学总论—系统科学] TB114.3[理学—概率论与数理统计]