汽车变速器齿轮疲劳寿命试验强化系数计算分析
|
摘要
以某SUV手动变速器齿轮为研究对象,在一般公路和试验场强化道路、山路和高环路上进行了载荷谱采集。用雨流计数法得到了载荷的分布形式,采用数理统计方法推断和检验了载荷的分布规律,并将采集到的载荷分为8级载荷谱。将此载荷谱施加到变速器齿轮轴系的多体动力学模型中,得到了关键节点的应力。用Miner理论计算了各挡齿轮在各个工况下的损伤,从而得到了各种试验场路面和变速器总成台架相对于一般道路的强化系数,对汽车耐久性试验的组织实施和汽车试验场的设计提供了重要依据。
The manual transmission of a certain SUV is employed as research object, and the load spectrums of its gears exposed to ordinary road, enhanced road, mountain road and high way road are sampled. The distribution function of load spectrums is obtained by means of rain-flow counting method and statistical theory. A method of load spectrum compilation suitable for fatigue reliability evaluation of gears is presented and the load spectrum is applied on the multibody dynamic model of transmission in order to compute the stress of key nodes. The damage of gears under all sampled load spectrums is calculated using Miner linear accumulated fatigue damage theory.Enhancement coefficients of each road and transmission test bench are obtained by comparing damage with ordinary road. This paper provides a theoretical evidence for automotive reliability testing and proving ground designing.
The manual transmission of a certain SUV is employed as research object, and the load spectrums of its gears exposed to ordinary road, enhanced road, mountain road and high way road are sampled. The distribution function of load spectrums is obtained by means of rain-flow counting method and statistical theory. A method of load spectrum compilation suitable for fatigue reliability evaluation of gears is presented and the load spectrum is applied on the multibody dynamic model of transmission in order to compute the stress of key nodes. The damage of gears under all sampled load spectrums is calculated using Miner linear accumulated fatigue damage theory.Enhancement coefficients of each road and transmission test bench are obtained by comparing damage with ordinary road. This paper provides a theoretical evidence for automotive reliability testing and proving ground designing.
引文
[1]郭虎,陈文华,樊晓燕,等.汽车试验场可靠性试验强化系数的研究[J].机械工程学报, 2004, 40(10):73-76, 81.
[2]Yang X, Liu X, Tong J, et al. Research on load spectrum construction of bench test based on automotive proving ground[J].Journal of Testing and Evaluation, 2018, 46(1):244-251.
[3]李鹏.汽车试验场道路强化系数的研究[D].长春:吉林大学,2007.
[4]吴坷,虞明,郁工瑞.汽车试验场可靠性试验强化系数的研究[J].汽车工程, 1996, 18(2):108-113.
[5]Karthikeyan N O, Kumar R D, Chandra V S. Accelerated lab test methodology for steering gearbox bracket[J]. SAE International Journal of Commercial Vehicles, 2017, 10(1):18-25.
[6]Gabriel M, Colin W, Philipp R T, et al. Review and application of rainflow residue processing techniques for accurate fatigue damage estimation[J]. International Journal of Fatigue, 2016,82(3):757-765.
[7]韩为铎,卢剑伟,龙道江.变刚度钢板弹簧加速寿命试验程序载荷谱编制[J].中国机械工程, 2017, 28(2):144-149.
[8]高云凯,徐成民,方剑光.车身台架疲劳试验程序载荷谱研究[J].机械工程学报, 2014, 50(4):92-98.
[9]徐灏.疲劳强度[M].北京:高等教育出版社, 1988.
[10]姚卫星.结构疲劳寿命分析[M].北京:国防工业出版社,2003.
[2]Yang X, Liu X, Tong J, et al. Research on load spectrum construction of bench test based on automotive proving ground[J].Journal of Testing and Evaluation, 2018, 46(1):244-251.
[3]李鹏.汽车试验场道路强化系数的研究[D].长春:吉林大学,2007.
[4]吴坷,虞明,郁工瑞.汽车试验场可靠性试验强化系数的研究[J].汽车工程, 1996, 18(2):108-113.
[5]Karthikeyan N O, Kumar R D, Chandra V S. Accelerated lab test methodology for steering gearbox bracket[J]. SAE International Journal of Commercial Vehicles, 2017, 10(1):18-25.
[6]Gabriel M, Colin W, Philipp R T, et al. Review and application of rainflow residue processing techniques for accurate fatigue damage estimation[J]. International Journal of Fatigue, 2016,82(3):757-765.
[7]韩为铎,卢剑伟,龙道江.变刚度钢板弹簧加速寿命试验程序载荷谱编制[J].中国机械工程, 2017, 28(2):144-149.
[8]高云凯,徐成民,方剑光.车身台架疲劳试验程序载荷谱研究[J].机械工程学报, 2014, 50(4):92-98.
[9]徐灏.疲劳强度[M].北京:高等教育出版社, 1988.
[10]姚卫星.结构疲劳寿命分析[M].北京:国防工业出版社,2003.