• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (24): 154-159.doi: 10.3901/JME.2018.24.154

• 运载工程 • 上一篇    下一篇

动车组铸钢制动盘裂纹扩展寿命预测

周素霞1,2, 赵兴晗1,2, 孙晨龙1,2, 孙锐1,2   

  1. 1. 北京建筑大学机电与车辆工程学院 北京 100044;
    2. 北京建筑大学城市轨道交通车辆服役性能保障北京市重点实验室 北京 100044
  • 收稿日期:2017-12-10 修回日期:2018-08-01 出版日期:2018-12-20 发布日期:2018-12-20
  • 通讯作者: 赵兴晗,男,1990年出生。主要研究方向为制动盘裂纹扩展。E-mail:595430274@qq.com
  • 作者简介:周素霞,女,1971年出生,博士,副教授。主要研究方向为车辆结构疲劳可靠性与动力学,金属材料内部损伤。E-mail:13811102858@163.com
  • 基金资助:
    国家自然科学基金(21082718034,51775031)和北京建筑大学研究生创新(PG2018084,PG2018087)资助项目。

Prediction of Crack Propagation Life of Cast Steel Brake Disc of EMU

ZHOU Suxia1,2, ZHAO Xinghan1,2, SUN Chenlong1,2, SUN Rui1,2   

  1. 1. Beijing University of Civil Engineering and Architecture, School of Mechanical-Electronic and Vehicle Engineering, Beijing 100044;
    2. Beijing University of Civil Engineering and Architecture, Urban Rail Transit Vehicle Service Performance Guarantee Key Laboratory of Beijing, Beijing 100044
  • Received:2017-12-10 Revised:2018-08-01 Online:2018-12-20 Published:2018-12-20

摘要: 为研究动车组铸钢制动盘出现裂纹后裂纹扩展速率和扩展寿命,根据制动盘材料参数,使用ANSYS软件建立制动盘的循环对称三维瞬态计算模型,采用间接耦合方法计算制动盘的温度场和应力场,得到在动车组速度为300 km/h的工况下,裂纹处的温度为355.33℃。以温度计算结果作为初始载荷计算制动盘热应力,制动盘最大热应力为899 MPa,盘面裂纹处的应力为501 MPa。并将计算结果作为计算制动盘的载荷输入到NASGRO中,对裂纹扩展速率和扩展寿命进行计算和分析。计算和分析结果表明,此材料制动盘径向裂纹长度尖端处的应力强度因子和扩展速率均高于深度尖端处;计算得出制动盘裂纹扩展寿命为制动48 831次,为该制动盘的使用提供参考。

关键词: NASGRO, 裂纹扩展寿命, 热应力, 应力强度因子, 制动盘

Abstract: In order to study the extended life of the cast steel brake disk of EMU, a-rotationally symmetrical 3D transient calculation model is established for brake disc. According to the material parameters of the cast steel material of the EMU, finite element analysis software ANSYS is utilized and indirect coupling method is adopted to simulate the instantaneous temperature filed and thermal-stress distribution produced by frictional heat load of brake disk. The calculated results are used as loads which are input into the NASGRO to analyze and calculate the crack propagation rate and the extended life. The simulation result illustrates that the stress intensity factor and crack growth rate at the tip of the radial crack length of the brake disc is higher than that at the tip of the depth; It is calculated that the crack propagation life of brake disc is 48 831 times. It provids a valuable reference for the use of the brake disc.

Key words: brake disc, crack propagation life, NASGRO, stress intensity factor, thermal stress

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