行星机构的可靠性分析与计算

发布时间：2018-05-05 05:25

本文选题：行星机构 + 偏载分析　；参考：《航空学报》2017年08期

【摘要】：行星机构的结构设计缺陷、制造与安装误差、支撑构件刚度不足等原因可能会使系统发生一定程度的偏载,从而会影响整个机构的使用寿命与可靠性。利用最小次序统计量的概念建立了行星齿轮系的可靠度计算模型,模型反映了偏载对齿轮系可靠性的影响。首先,对行星机构进行了详细的运动学和力学分析,计算得到了各个齿轮的随机载荷历程。根据Miner线性疲劳累积损伤法则,将随机载荷历程转化为等效恒幅载荷谱,并将其作为可靠性模型的载荷输入变量。然后,将特定齿轮的疲劳寿命数据进行统计处理,将统计结果作为可靠性模型的强度输入变量。最后,根据模型的计算结果定量地说明了偏载对行星齿轮系可靠性的影响程度,同时利用随机截尾数据处理方法对可靠性模型的有效性进行了验证。
[Abstract]:The defects in structure design, manufacturing and installation errors, and insufficient stiffness of supporting members may lead to a certain degree of bias load of the system, which will affect the service life and reliability of the whole mechanism. The reliability calculation model of planetary gear system is established by using the concept of minimum order statistics. The model reflects the influence of bias load on gear system reliability. Firstly, the kinematics and mechanics of the planetary mechanism are analyzed in detail, and the random load history of each gear is calculated. According to the Miner linear fatigue cumulative damage rule, the random load history is transformed into the equivalent constant amplitude load spectrum and used as the load input variable of the reliability model. Then, the fatigue life data of a particular gear are statistically processed, and the statistical results are taken as the strength input variables of the reliability model. Finally, the influence of bias load on the reliability of planetary gear system is quantitatively explained according to the calculation results of the model, and the validity of the reliability model is verified by the method of random truncation data processing.
【作者单位】：东北大学机械工程与自动化学院;中国航发黎明运行保障中心;
【基金】：国家科技支撑计划(2014BAF08B01) 国家自然科学基金(51335003)~~
【分类号】：TH132.41

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