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-M iner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.
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.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2006年第3期381-385,共5页
Journal of Southwest Jiaotong University
基金
教育部高等学校骨干教师基金资助项目
关键词
高速列车
构架
谱载荷
疲劳强度
多轴应力
单轴应力
high-speed train
frame
spectrum load
fatigue strength
multiaxial stress
uniaxial stress
