动车组运行状态制动毂建模及应力分析

doi:10.3901/JME.2019.05.097

机械工程学报 ›› 2019, Vol. 55 ›› Issue (5): 97-103.doi: 10.3901/JME.2019.05.097

动车组运行状态制动毂建模及应力分析

齐红元¹, 秦芳芳¹, 张蕾¹, 申林¹, 郝文晓¹, 周永杰², 尹方²

1. 北京交通大学机械与电子控制工程学院北京 100044;
2. 中车唐山机车车辆股份有限公司唐山 066004

收稿日期:2018-06-13 修回日期:2018-12-26 出版日期:2019-03-05 发布日期:2019-03-05
通讯作者: 郝文晓(通信作者),男,1992年出生,博士研究生。主要研究方向为机车车辆状态检测。E-mail:17116376@bjtu.edu.cn
作者简介:齐红元,男,1964年出生,博士,副教授,博士研究生导师。主要从事机车车辆的科研与教学工作。E-mail:hyqi@bjtu.edu.cn
基金资助:
中车唐山机车车辆有限公司资助项目（M16L00480）。

Modeling and Stress Analysis of Brake Hub of EMU Train under Running State

QI Hongyuan¹, QIN Fangfang¹, ZHANG Lei¹, SHEN Lin¹, HAO Wenxiao¹, ZHOU Yongjie², YIN Fang²

1. School of Mechanical and Electrical Control Engineering, Beijing Jiaotong University, Beijng 100044;
2. CRRC Tangshan Co., Ltd, Tangshan 066004

Received:2018-06-13 Revised:2018-12-26 Online:2019-03-05 Published:2019-03-05

摘要/Abstract

摘要： 制动毂是动车组制动系统的重要联接部件，由于目前在其强度校核与设计中仅考虑车辆制动状态，而忽略了正常运行状态，无法解释其早期疲劳失效的机理。通过车辆正常运行状态下的制动毂动力学分析，其主要受制动盘旋转及路谱冲击作用下的两种惯性力作用，建立了制动盘毂的力学模型；采用弹性力学和动力学的方法，通过模型简化，建立制动盘与毂的变形协调条件，进而提出制动毂齿的动应力分析方法，得出制动毂齿主要处于随机动拉应力状态的结论，阐述制动毂齿的主要失效形式为疲劳失效。最后以动车组制动毂为计算分析实例，对比分析了不同附加垂向加速度和运行速度下制动毂齿的合应力变化规律，结果表明，路谱冲击下的附加加速度及运行速度越大，制动毂齿的合应力也越大，并且由力学模型可知，制动盘毂的尺寸、质量都会影响制动毂齿的应力状态。

关键词: 应力分析, 运行状态, 制动毂齿, 制动盘

Abstract: Brake hub (BH) is an important connecting part of EMU braking system. At present, it is difficult to explain the mechanism of early fatigue failure of BH, because only the brake state of vehicle is considered and the normal running state is always neglected. In this paper, the dynamic analysis of BH under normal running state shows that the BH is mainly subjected to two inertia forces of motion state, namely, the rotation of brake disc and the impact of road spectrum, then the mechanical model of BH is established. With the help of the methods of elastic mechanics and dynamics, the deformation coordination conditions of brake disc and hub (BDH) are proposed by modeling simplification. As the result, the dynamic stress analysis method of BH teeth is put forward, and the conclusion that BH teeth are mainly in the state of random dynamic tension stress is revealed, so the failure mode of BH teeth belongs to fatigue failure. Finally, taking the BH of EMU as an example of calculation and analysis, the resultant stress of the BH teeth varied with different additional vertical acceleration and running speed is analyzed. The results show that the greater the additional acceleration under the impact of road spectrum and running speed are, the greater the resultant stress of the BH teeth is. Furthermore, according to the mechanical model of the brake disc-hub (BDH), their size and quality can also affect the stress of the BH teeth.

Key words: brake hub teeth, braking disc, running status, stress analysis

中图分类号:

U266

齐红元, 秦芳芳, 张蕾, 申林, 郝文晓, 周永杰, 尹方. 动车组运行状态制动毂建模及应力分析[J]. 机械工程学报, 2019, 55(5): 97-103.

QI Hongyuan, QIN Fangfang, ZHANG Lei, SHEN Lin, HAO Wenxiao, ZHOU Yongjie, YIN Fang. Modeling and Stress Analysis of Brake Hub of EMU Train under Running State[J]. Journal of Mechanical Engineering, 2019, 55(5): 97-103.

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动车组运行状态制动毂建模及应力分析

Modeling and Stress Analysis of Brake Hub of EMU Train under Running State

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