汽车链疲劳寿命威布尔分布形状参数的探讨  

Study on Weibull Distribution Form Parameter of Automotive Chain Fatigue Lifetime

作　　者：程亚兵[1] 孟繁忠[2] 冯增铭[1] 

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130025 [2]吉林大学链传动研究所,吉林长春130025

出　　处：《润滑与密封》2009年第6期13-16,共4页Lubrication Engineering

基　　金：国家科技型中小企业技术创新基金项目(01C26213300872)

摘　　要：探讨了汽车链疲劳寿命的分布规律,揭示了汽车链疲劳寿命威布尔分布形状参数随链条规格、载荷水平变化的特点,设计了可靠寿命的抽样检验方法。试验结果表明:在高应力水平下,汽车链疲劳寿命服从两参数的威布尔分布,其形状参数随载荷的增大而增大,随节距的增大而减小,且加速试验抽样检验比正常载荷抽样检验节省试验时间,降低试验成本,考虑到失效模式,建议过载水平为标准中规定的最小极限拉伸载荷的0.30～0.33。The distribution function of automotive chain fatigue lifetime was discussed and the characteristics of Weibull distribution form parameter of fatigue lifetime that vary with its specification and loading were analyzed, the sampling inspection plan of lifetime of reliability was designed. The test results show that the lifetime of automotive chain under high stress test conditions complys with Weibull distribution with two parameters, the form parameter increases with test load increasing and decreases with pitch increasing. The sampling test by accelerating test can save time and cost, and the suggested overload level is 0. 30 to 0. 33 times of the minimum limit tensile load that the standard requires.

关 键 词：汽车链 疲劳寿命 威布尔分布 形状参数 抽样检验 

分 类 号：TH132.45[机械工程—机械制造及自动化]