• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (22): 159-166.doi: 10.3901/JME.2020.22.159

• 运载工程 • 上一篇    下一篇

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考虑旋转效应的制动盘螺栓弯矩分布规律

范童柏, 任尊松, 查浩, 徐宁   

  1. 北京交通大学机械与电子控制工程学院 北京 100044
  • 收稿日期:2019-11-28 修回日期:2020-03-18 出版日期:2020-11-20 发布日期:2020-12-31
  • 通讯作者: 范童柏(通信作者),男,1993年出生,博士研究生。主要研究方向为轮轨动力学。E-mail:15116354@bjtu.edu.cn
  • 作者简介:任尊松,男,1969年出生,博士,教授,博士研究生导师。主要研究方向为车辆/轨道系统动力学及结构强度。E-mail:zsren@bjtu.edu.cn
  • 基金资助:
    国家自然科学基金(11790281,51575036)和国家重点研发计划(2016YFB1200506-21)资助项目。

Distribution and Variation of Bolt Bending Moment of Brake Discs under High-speed Rotation

FAN Tongbai, REN Zunsong, ZHA Hao, XU Ning   

  1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044
  • Received:2019-11-28 Revised:2020-03-18 Online:2020-11-20 Published:2020-12-31

摘要: 制动盘螺栓对保证列车制动和运行安全具有十分重要的作用,掌握制动盘螺栓弯矩分布规律对确保其使用寿命具有重要意义。采用高速动车组制动盘螺栓弯矩载荷测试技术,对国内多条实际线路的制动盘螺栓弯矩进行测试,获得了制动盘螺栓弯矩与动车组运行速度的关系。依据轮装制动盘螺栓连接结构的尺寸和工作环境开展理论分析,获得了螺栓杆弯矩分布的理论值。建立轮装制动盘车轮结构有限元模型,模拟仿真车轮高速旋转过程中螺栓杆受力情况,得到不同速度下螺栓杆的弯矩分布有限元解。研究结果表明,螺栓杆上的弯矩与列车运行速度密切相关,且运行速度越大,螺栓杆上弯矩越大。理论推导和有限元仿真结果均表明螺栓杆上各截面的弯矩大小和方向并不一致,在内外侧截面和中间截面出现弯矩极值,且方向相反。由于车轮内外结构的不对称性,导致螺栓杆上靠近轮缘一侧的截面弯矩大于外侧截面弯矩。研究工作为进一步研究制动盘螺栓的结构可靠性奠定了基础。

关键词: 动车组, 制动盘螺栓, 高速旋转, 弯矩, 有限元

Abstract: Brake disc bolts play an important role in guaranteeing EMU braking and operation safety. It is of great significance to know the bending moment distribution of brake disc bolts for ensuring their service life. Based on the bending moment test method of brake disc bolts of the high speed EMU, there are several bolt bending moment tests on the actual operation lines and the relationship between bolt bending moments and operation speeds is obtained. According to the size and working environment of bolts of wheeled brake discs, the theoretical analysis of bolt bending moment is finished and the theoretical value is obtained. With the establishment of the finite element model of wheeled brake discs, the bolt loads condition under high-speed rotation is simulated. The results show that the bolt bending moment is closely related to the operation speed of EMU. The higher the operation speed is, the bigger the bolt bending moment is. The results from the theory and finite element model show that the values and directions of bending moments of different bolt sections are inconsistent. The extremums of bending moments appear in both end and middle sections. And the directions between end and middle sections are the opposite. However, due to the asymmetry of the wheel structure, the bending moment of the inner end section is bigger than that of the outer end section. The research work lays a foundation for further research on structural reliability of brake disc bolts.

Key words: EMU, bolts of brake discs, high-speed rotation, bending moment, finite element

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