城轨车体端部底架疲劳试验方法研究
火巧英1,金文涛1,李东风1,窦卿2,王冲2,王康*,3
(1.中车南京浦镇车辆有限公司,江苏 南京 210031;2.南京雷尔伟新技术股份有限公司,江苏 南京 210031;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:车体是城轨车辆的重要组成结构,而端部底架又是车体受力和焊缝布局最复杂的部位,其疲劳可靠性对整车的抗疲劳能力至关重要。疲劳试验既可以考核车体的疲劳寿命,还能够将焊缝的工艺因素考虑在内。本文通过调研和对比国内外相关文献和标准,确定了按挠度一致性原则施加垂向静载荷并根据EN 12663标准和VDV 152建议编制了车钩纵向、车体垂向以及中心销载荷在内的城轨车体端部底架疲劳试验载荷谱,根据试验载荷制定了端部底架的疲劳试验方案,并完成了端部底架的疲劳试验。通过试验过程中和试验完成后的探伤检查,验证了该型城轨车辆端部底架的焊接工艺和抗疲劳能力满足设计要求。  
关键词:城轨车辆;端部底架;疲劳试验载荷;试验加载方案
中图分类号:U271.91 文献标志码:A doi:10.3969/j.issn.1006-0316.2022.06.007
文章编号:1006-0316 (2022) 06-0046-07
Fatigue Test Method of End Underframe of Urban Rail Car Body
HUO Qiaoying1,JIN Wentao1,LI Dongfeng1,DOU Qing2,WANG Chong2,WANG Kang3
( 1.CRRC Nanjing Puzhen Co., Ltd., Nanjing 210031, China; 2.Nanjing Railway New Technology Co., Ltd., Nanjing 210031, China; 3.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China )
Abstract:The car body is an important bearing component of the urban rail vehicle. The end underframe is the most complicated part of the car body force and weld layout, and its fatigue reliability is crucial to the fatigue resistance of the vehicle. The fatigue test can accurately evaluate the fatigue life of the car body. It can also take the process factors of the weld into consideration. Through reviewing relevant domestic and foreign literatures and standards, this paper determines the application of vertical static load according to the principle of deflection consistency. The fatigue test load spectrum of the end underframe of the car body, including the longitudinal direction of the coupler, the vertical direction of the vehicle body and the load of the center pin, is compiled according to the EN 12663 standard and VDV 152 recommendations. The fatigue test plan of the end underframe is established according to the test load, and the fatigue test is completed. Through the flaw detection during and after the test, the welding process and fatigue resistance of the end underframe are verified to meet the design requirements.
Key words:urban rail car;end underframe;fatigue test loads;test loading plan
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收稿日期:2021-10-27
基金项目:国家重点研发计划(2016YFB1200505);国家重点研发计划(2017YFB1201304-13)
作者简介:火巧英(1981-),女,甘肃兰州人,高级工程师,主要研究方向为轨道车辆车体及焊接工艺,174110879@qq.com。*通讯作者:王康(1998-),男,河南南阳人,硕士研究生,主要研究方向为车辆工程,E-mail:kwang_up@163.com。
 

 

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