| 基于谱载荷的高速列车转向架的疲劳强度 |
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| 引用本文： | 米彩盈,李芾.基于谱载荷的高速列车转向架的疲劳强度[J].西南交通大学学报,2006,41(3):381-385. |
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| 作者姓名： | 米彩盈 李芾 |
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| 作者单位： | 西南交通大学院机械工程学院,四川,成都,610031 |
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| 基金项目： | 教育部高等学校骨干教师基金资助项目 |
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| 摘 要： | 为了有效地预测高速列车转向架构架的疲劳强度或寿命,提出了一种基于试验谱载荷的疲劳强度预测方法.这种方法是用雨流计数法对UIC515-4和UIC615-4规定的构架疲劳强度试验载荷和载荷循环次数进行分级,用有限元法确定构架在每级载荷作用下的应力分布,将多轴应力转化为单轴应力,根据Palmgren-Miner线性累积损伤准则计算构架的等效应力,利用S-N疲劳曲线预测构架的疲劳强度或寿命.算例表明,采用该预测方法计算的高速列车转向架构架的疲劳强度与现有文献的结果一致.
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| 关 键 词： | 高速列车 构架 谱载荷 疲劳强度 多轴应力 单轴应力 |
| 文章编号： | 0258-2724(2006)03-0381-05 |
| 修稿时间： | 2005年10月10 |
Fatigue Strength of Bogie Frame of High-Speed Train under Spectrum Load |
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| MI Caiying,LI Fu.Fatigue Strength of Bogie Frame of High-Speed Train under Spectrum Load[J].Journal of Southwest Jiaotong University,2006,41(3):381-385. |
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| Authors: | MI Caiying LI Fu |
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| Abstract: | To forecast fatigue strength or fatigue life of the bogie frame of a high-speed train effectively,a method for fatigue strength forecasting based on tested spectrum loads was proposed.First,with this method,test loads and their cycle numbers for fatigue strength of the bogie frame based on the criteria UIC515-4 and UIC615-4 are graded by using the rain-flow counting method.Second,tresses in the bogie frame under each level of loads are calculated by using the finite element method,multiaxial stresses are changed into a uniaxial stress,and the equivalent stress in the frame is calculated by using the Palmgren-Miner linear cumulative damage hypothesis.Finally,the fatigue strength or fatigue life of the frame is forecasted on the basis of the S-N fatigue life curve.A calculation example shows the validity of this method. |
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| Keywords: | high-speed train frame spectrum load fatigue strength multiaxial stress uniaxial stress |
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