T型过渡圆弧长度对铁路车轴疲劳性能的影响研究
杨凯1，史玉杰1，李亚波1，刘为亚1，陈一萍1，董懿辉2，鲁连涛2
（1.中车青岛四方机车车辆股份有限公司工程实验室，山东 青岛 266111；2.西南交通大学 牵引动力国家重点实验室，四川 成都 610031）
摘要：研究了非动力车轴T型过渡圆弧长度C对车轴轮座微动参量，微动疲劳SWT参数和过渡圆弧最大主应力的影响，并根据EN 13103-2017校核了车轴过渡圆弧设计的合理性。研究发现：车轴轮座接触压应力、摩擦剪切应力随着C的增加而减小，轴向滑移幅值随着C的增加而增加。微动疲劳SWT参数随着C增加而增加，减小C可以缓解车轴微动疲劳损伤。针对该研究车轴，当C由35 mm增至42 mm时，T型过渡圆弧处最大主应力先减小，此后几乎不变，最大值位置由两段圆弧内切点向轴身侧转移。仿真计算得到的Cmin略小于标准建议值，车轴设计满足EN 13103-2017对车轴过渡圆弧设计的要求。
关键词：过渡圆弧；微动参量；SWT参数；最大主应力
中图分类号：U270.1 文献标志码：A doi：10.3969/j.issn.1006-0316.2021.11.007
文章编号：1006－0316 (2021) 11－0049－08
Impact of the Length of T-Shaped Transition on Fatigue Behavior of Railway Axles
YANG Kai1，SHI Yujie1，LI Yabo1，LIU Weiya1，CHEN Yiping1，DONG Yihui2，LU Liantao2
( 1.Engineering Laboratory, CRRC Qingdao Sifang Co., Ltd., Qingdao 266111, China;2.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China )
Abstract：The influence of the T-shaped transition length C of the non-powered axle on the fretting parameters, SWT parameter and the maximum principal stress were investigated. Then, the transition design was checked according to EN 13103-2017. It was found that the contact pressure and frictional shear stress decreased with an increase of C, and the axial slip range increased with an increase of C. SWT parameter increased with an increase of C, and reducing C can alleviate fretting fatigue damage of the axle. When C increased from 35 mm to 42 mm, the maximum principal stress at the T-shaped transition first decreased, and then almost remained unchanged. The position of the maximum value shifted from the inner tangent point of the two radii to the side of the axle body. The Cmin calculated using FE simulation was slightly smaller than that obtained by EN 13103-2017, and the axle design met the requirements of EN 13103-2017 for the transition design.
Key words：transition；fretting parameter；SWT parameter；maximum principal stress
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收稿日期：2021－04－28
基金项目：牵引动力国家重点实验室自主研究课题重点项目（2018TPL_Z01）；国家自然科学基金（51375406）
作者简介：杨凯（1988－），男，山东临沂人，硕士，工程师，主要研究方向为车轴疲劳与断裂，E-mail：yangkai@cqsf.com。
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