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›› 2015, Vol. 37 ›› Issue (3): 326-331.doi: 10.6052/1000-0879-14-257

• 应用研究 • 上一篇    下一篇

轨道车辆空气弹簧疲劳分析

李志超1,2, 李雪冰3, 刘万强3, 何园2, 王昊2, 丁智平1, 危银涛2   

  1. 1. 湖南工业大学机械工程学院, 湖南株洲 412007;
    2. 清华大学汽车安全与节能国家重点实验室, 北京 100084;
    3. 青岛四方车辆研究所有限公司, 山东青岛 266031
  • 收稿日期:2014-08-01 修回日期:2014-09-15 出版日期:2015-06-15 发布日期:2015-07-03
  • 通讯作者: 李志超,硕士研究生,主要从事橡胶产品疲劳与仿真方面的工作.E-mail:lizhichao7302@126.com;危银涛,教授,博士生导师,主要从事汽车动力学与控制、轮胎力学与复合材料及有限元与优化设计等方面的研究工作.E-mail:weiyt@tsinghua.edu.cn E-mail:lizhichao7302@126.com;weiyt@tsinghua.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51275265,51175286).

FATIGUE ANALYSIS OF THE AIR SPRINGS OF THE RAIL VEHICLES

LI Zhichao1,2, LI Xuebing3, LIU Wanqiang3, HE Yuan2, WANG Hao2, DING Zhiping1, WEI Yintao2   

  1. 1. School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan, China;
    2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;
    3. Qingdao Sifang Rolling Stock research Institute Co, Ltd, Qingdao 266031, Shandong, China
  • Received:2014-08-01 Revised:2014-09-15 Online:2015-06-15 Published:2015-07-03

摘要: 利用基于开裂能理论的疲劳分析方法对空气弹簧进行寿命评估. 借助有限元技术对带有附加气室的空气弹簧系统进行仿真, 提取空气弹簧胶囊每个单元中心的应变历程, 将应变历程代入开裂能计算公式计算每个单元中心所有可能开裂平面的开裂能峰值, 再利用开裂能峰值计算撕裂能峰值, 进而计算对应的等效撕裂能, 最后利用等效撕裂能计算每个单元中心所有可能开裂平面的裂纹扩展速率和对应的疲劳寿命. 将疲劳预测寿命与实验寿命进行比较, 结果表明疲劳预测寿命是实验寿命的1.91 倍, 验证了疲劳仿真模型和方法的可靠性.

关键词: 空气弹簧|有限元仿真|空簧垂向刚度|疲劳分析

Abstract: The fatigue analysis based on the theory of the cracking energy density(CED) is carried out to predict the fatigue life of the air spring. The finite element simulation of the air spring system with an auxiliary chamber is made, and the strain history of each element's center for the air spring capsule is obtained. The strain history obtained by the simulation is substituted into the CED formula to calculate the CED peak of all possible cracking plane for each element's center. The CED peak is used to calculate the related tearing energy's peak. The corresponding equivalent tearing energy is calculated. Finally, the equivalent tearing energy is used to calculate the crack's propagation rate and the corresponding fatigue life of all possible cracking plane for each element's center. Comparing the predicted fatigue's life with experimentally obtained fatigue's life, it is shown that the predicted fatigue's life is 1.91 times of the experimentally obtained fatigue's life, which verifies the reliability of the model and the method of the fatigue simulation.

Key words: air spring|the finite element simulation|air spring vertical stiffness|the fatigue analysis

中图分类号: 

  • TQ336.1+5