齿轮传动多模式失效的时变可靠性分析  

Analysis of Time Variant Reliability for Gear with Multi-failure Mode

作　　者：王明清[1] 陈作越[1] 

机构地区：[1]乐山职业技术学院机电工程系,四川乐山614000

出　　处：《机械传动》2011年第4期50-53,共4页Journal of Mechanical Transmission

基　　金：乐山职业技术学院科学研究计划项目资助(KY10-14)

摘　　要：提出一种在多种失效模式下的齿轮传动时变可靠性模型和计算方法。以齿轮疲劳寿命系数与应力循环次数之间的关系曲线建立齿轮强度时变模型,进而建立同时考虑齿面接触疲劳失效和齿根弯曲疲劳失效的可靠性分析模型。基于一次二阶矩方法推导齿面接触疲劳失效和齿根弯曲疲劳失效的时变概率计算公式,并推导出了这两种失效模式的联合失效概率密度函数的解析公式。最后给出了数值计算实例。A model of time-variant reliability and its computation method of gear drive under multi-failure mode are presented.The time-variant model of gear strength is created by using the relationships curve between the gear fatigue lifecoefficient and the number of stress cycle.And then the reliability analysis model of gear drive is presented,in which the contact fatigue failure and blend fatigue failure are taken into account.The time-variant probabilistic formula of the contact fatigue failure and blend fatigue failure is derived by using the first order second moment method.The analytic formula of the joint failure probability density function of the two fatigue modes is derived.A numerical example is given to illustrate the presented method.

关 键 词：多模式失效 时变可靠性 齿轮传动 

分 类 号：TH132.41[机械工程—机械制造及自动化]