摘要
以GCY300II型轨道车12 t轴重车轴为研究对象,采用机车车轴的强度标准,利用有限元计算方法计算车轴不同轴重下的6种不同工况的静强度和疲劳强度,在获得对应工况的应力分布及数值的基础上,进行车轴的静强度和疲劳强度分析,并确定车轴薄弱部位,然后假定车轴最薄弱部位出现疲劳裂纹,将不同轴重、不同工况下计算得到的应力数值作为车轴裂纹处的载荷应力谱,再结合疲劳断裂分析理论计算分析车轴疲劳裂纹扩展寿命。计算结果表明:车轴薄弱部位为车轴变截面处,其中最薄弱部位为车轮内侧轮座处上边缘。
Taking axle of GCY300II 12t-axle-load rail car as research object, according to locomotive axle strength standards, axle static and fatigue strength of the six different conditions with different axle load was calculated with finite element method. Based on the stress distribution and numerical value, static and fatigue strength of axle were analyzed, and weak parts of the axle was determined. Assuming the weakest parts of axle, and taking stress values of different axle load and different conditions as axle cracking-point stress spectrum, fatigue crack propagation life of axle was analyzed combined with theoretical calculation. The results showed that variable cross-section was weak part of axle, and the weakest part was edge of inside wheel seat.
出处
《机车电传动》
北大核心
2013年第2期74-77,84,共5页
Electric Drive for Locomotives
关键词
轨道车辆
车轴
强度分析
裂纹扩展寿命
rail vehicle
axle
strength analysis
crack propagation life
