Analysis of Rail Vehicle Axle Strength and Fatigue Crack Propagation Life

LI Rui-xia; ZHAO Li; QI Shuang-qiang; WANG Gui-jun

doi:10.13890/j.issn.1000-128x.2013.02.024

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Analysis of Rail Vehicle Axle Strength and Fatigue Crack Propagation Life

更新时间：2021-12-13

- Analysis of Rail Vehicle Axle Strength and Fatigue Crack Propagation Life
- Electric Drive for Locomotives Issue 2, Pages: 74-77(2013)
- 作者机构：
  
  1. 宝鸡南车时代工程机械有限公司,陕西,宝鸡,721003
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128x.2013.02.024
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LI Rui-xia, ZHAO Li, QI Shuang-qiang, et al. Analysis of Rail Vehicle Axle Strength and Fatigue Crack Propagation Life. [J]. Electric Drive for Locomotives (2):74-77(2013)
DOI：

LI Rui-xia, ZHAO Li, QI Shuang-qiang, et al. Analysis of Rail Vehicle Axle Strength and Fatigue Crack Propagation Life. [J]. Electric Drive for Locomotives (2):74-77(2013) DOI： 10.13890/j.issn.1000-128x.2013.02.024.

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。

Abstract

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.

关键词

轨道车辆车轴强度分析裂纹扩展寿命

Keywords

rail vehicleaxlestrength analysiscrack propagation life

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