基于刚柔耦合动力学的高速列车转向架构架振动疲劳研究
发布时间：2023/2/13 15:31:51    作者：李传迎1，李鹏1，吴兴文*,2，董晓华3      【字体：大 中 小】
李传迎1，李鹏1，吴兴文*,2，董晓华3
（1.中车青岛四方机车车辆股份有限公司，山东 青岛 266111；2.西南交通大学 机械工程学院，四川 成都 610031；3.西南交通大学 牵引动力国家重点实验室，四川 成都 610031）
摘要：构建了考虑转向架构架高频柔性的刚柔耦合动力学模型，结合模态应力恢复方法实现了考虑轨道激励的转向架构架动应力求解。基于该模型，提出一种基于典型服役模式扫频激励的转向架构架动态薄弱位置识别方法，研究了转向架构架薄弱位置动应力在典型服役工况下的应力特征和各特征工况损伤；最后，结合京广线路分布特征，研究了转向架构架薄弱位置的损伤。结果表明：基于典型服役模式扫频激励识别的结构动态薄弱位置，能够包含传统准静态方法识别的静态薄弱位置，同时可以识别薄弱位置的敏感频带；曲线半径对转向架关键位置损伤具有显著影响，随着曲线半径的减小损伤显著增大；考虑京广线曲线和直线分布特征，计算得到的转向架构架关键位置损伤满足1200万公里设计寿命的要求。
关键词：高速列车刚柔耦合动力学；模态应力恢复；静态薄弱位置；动态薄弱位置
中图分类号：U270 文献标志码：A doi：10.3969/j.issn.1006-0316.2023.01.004
文章编号：1006-0316 (2023) 01-0020-09
Study on Vibration Fatigue of High-Speed Train Bogie Frame Based on Rigid Flexible Coupling Dynamics
LI Chuanying1，LI Peng1，WU Xingwen2，DONG Xiaohua3
( 1.CRRC Qingdao Sifang Co., Ltd., Qingdao 266111, China; 2.School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China; 3.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China )
Abstract：The rigid flexible coupling dynamic model considering the high frequency flexibility of the bogie frame is constructed, and the dynamic stress of the bogie frame considering the track excitation is solved by combining the modal stress recovery method. According to this model, a method for identifying the dynamic weak position of the bogie frame based on the sweep frequency excitation of typical service mode is proposed, and the stress characteristics of dynamic stress at the weak position of the bogie frame under typical service conditions and damage under each characteristic condition are studied. Finally, on the basis of the distribution characteristics of the Beijing-Guangzhou line, the damage of the weak position of the bogie frame is studied. The results show that the structural dynamic weak position identified based on the sweep frequency excitation of typical service mode includes the static weak position identified by the traditional quasi-static method, and can identify the sensitive frequency band of the weak position. The curve radius has a significant impact on the damage of the key positions of the bogie, and the damage increases significantly with the decrease of the curve radius. Considering the curve and straight-line distribution characteristics of the Beijing-Guangzhou line, the calculated damage at the key positions of bogie frame meets the requirement of the expected total mileage of 12 million km.
Key words：rigid-flexible coupled dynamic model of high-speed train；modal stress recovery method；static weak position；dynamic weak position
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收稿日期：2022-04-21
基金项目：国家重点研发计划（2018YFE0201401）；国家自然科学基金（51805450）；四川省应用基础研究（2020YJ0075）
作者简介：李传迎（1988－），男，山东聊城人，硕士研究生，主要研究方向为车辆系统动力学和结构疲劳，Email：lichuanying@cqsf.com。*通讯作者：吴兴文（1988－），男，四川成都人，博士，副教授，主要研究方向为振动疲劳，Email：xingwen_wu@163.com。
 

 

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