广东工业大学学报 ›› 2010, Vol. 27 ›› Issue (1): 82-85.

• 综合研究 • 上一篇    下一篇

雨流计数法与概率分布拟合在疲劳寿命估算中的应用

  

  1. 广东工业大学土木与交通工程学院,广东广州510006
  • 出版日期:2010-03-25 发布日期:2010-03-25
  • 作者简介:张吉桥(1980-),男,讲师,博士,主要研究方向为固体力学
  • 基金资助:

    广东工业大学青年教师基金资助项目(083065)

Application of Rain—flow Counting Distribution Fitting Technique in the M ethod and Probability Estimation of Fatigue Life

  1. Facuhy of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China
  • Online:2010-03-25 Published:2010-03-25

摘要: 采用雨流计数法对一桁架节点的疲劳应力谱进行统计处理,得到各应力幅与相应的应力循环数,并对该计数结果进行Weibull概率分布拟合.基于Miner线性疲劳累积损伤理论,使用雨流计数结果和概率分布拟合结果对桁架节点的疲劳寿命进行估算.结果表明,雨流计数法与概率分布拟合法的联用对结构的疲劳寿命估算较为真实可靠.

关键词: 雨流计数法;Miner法则;Weibull概率分布;疲劳寿命

Abstract: Rain-flow counting method is adopted to cycles from the fatigue stress spectra of a truss nodegain different stress amplitudes and their corresponding stress The W eibull probability distribution fitting is applied to the above resuhs.Based on Miner linear cumulative damage theory of fatigue,the datum of rain—flow counting results and Weibull probability distribution fitting results are used to estimate the fatigue life of the truss node.The experimental results show that the combination of the rain.flow counting method with the probability distribution fitting technique makes the estimation of the fatigue life more authentic.

Key words: rain—flow counting method;Miner rule;Weibull probability distribution;fatigue life

[1]徐灏.疲劳强度[M].北京:高等教育出版社,1988.

[2]王德俊,平安,徐灏.随机疲劳载荷的处理及载荷谱编制原则[J].东北大学学报,1994,15(4):327-331.

[3]高镇同,熊峻江.疲劳可靠性[M].北京:北京航空航天大学出版社,2000.

[4]赵晓鹏,姜丁,张强,等.雨流计数法在整车载荷谱分析中的应用[J].科技导报,2009,27(3):67-73.

[5]樊晓燕,吴兹攀,童忠钫.机械零部件疲劳载荷谱编制[J].机电工程,1994,2:23-26.

[6]王宏伟,邢波,骆红云.雨流计数法及其在疲劳寿命估算中的应用[J].矿山机械,2006,34(3):95-97.

[7]金德新.改进的雨流计数法应用于随机载荷下的寿命预测[J].鞍钢技术,2000,5:55-57.

[8]钱洪新.载荷谱型对疲劳损伤分布的影响[J].南京航空航天大学学报,2001,33(3):241-244.

[9]李莹.公路钢桥疲劳性能及可靠性研究[D].黑龙江:哈尔滨工业大学,2008.
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