表面技术2024，Vol.53Issue(3)：152-161,10.DOI:10.16490/j.cnki.issn.1001-3660.2024.03.015
山地城市地铁牵引与制动工况下钢轨波磨成因对比研究
Comparative Study on Causes of Rail Corrugation under Traction and Braking Conditions in a Mountainous City Metro
摘要
Abstract
Due to the complex line conditions and train service conditions,the rail corrugation problem of a mountainous city metro is obvious.The metro operation and maintenance face great challenges.Based on the viewpoint of friction self-excited vibration,the work aims to study the friction self-excited vibration characteristics of wheelset-rail system under traction and braking conditions in the long steep grade section of a mountainous city metro.It is suggested that the friction self-excited vibration caused by saturated creep force between wheelset-rail system may induce the generation of rail corrugation.Firstly,in combination with the field investigation of the long steep grade section of a mountainous city metro,the vehicle-track system dynamics models under the uphill traction and downhill braking conditions were constructed.The vehicle-track system dynamics characteristics under the traction and braking conditions were explored.Then,the finite element models of wheelset-track-traction and wheelset-track-brake systems were constructed.The friction self-excited vibration characteristics of the wheelset-rail system under traction and braking conditions were studied by complex eigenvalue method.The causes of rail corrugation under traction and braking conditions in the long steep grade section of a mountainous city metro were revealed.Finally,by the least square method and particle swarm optimization algorithm,the optimal solution of vehicle-track parameters was obtained to suppress rail corrugation.It was found that the wheelset-track-traction system had an unstable vibration frequency of 369.93 Hz.Its modal vibration occurred in the outer rail,and the real part of the complex eigenvalue was 19.36.The wheelset-track-brake system had an unstable vibration frequency of 443.92 Hz.Its modal vibration occurred in the outer rail,and the real part of the complex eigenvalue was 4.970 5.Compared with wheelset-track-brake system,the real part of the complex eigenvalue of wheelset-track-traction system is larger,so the train is more likely to generate friction self-excited vibration in traction condition than in braking condition.The result is consistent with the field investigation that rail corrugation mainly occurs in the outer rail,and it is more likely to occur and more serious in the traction section than in the braking section.The results show that,in the same long steep grade section of a mountainous city metro,rail corrugation often occurs in the section that is the intersection of the circular curve section and easing curve section with slope changing greatly.Rail corrugation is more likely to occur and more serious in the traction condition than in the braking condition.The self-excited vibration of traction friction and wheelset-rail friction may be the main cause of rail corrugation in the traction section,and the self-excited vibration of braking friction and wheelset-rail friction may be the main cause of rail corrugation in the braking section.The former is more likely to happen than the latter.When the braking pressure is set to 5 kN under the braking condition,the generation of rail corrugation in the braking section can be effectively inhibited.When the traction running speed is 80 km/h under the traction condition,the vertical stiffness is set as 55 MN/m,the lateral stiffness is as 25 MN/m,the generation of rail corrugation in the traction section can be effectively inhibited.关键词
钢轨波磨/摩擦自激振动/复特征值/牵引工况/制动工况/山地城市地铁Key words
rail corrugation/friction self-excited vibration/complex eigenvalue/traction condition/braking condition/mountainous city metro分类
交通运输引用本文复制引用
崔晓璐,尹越,徐佳,漆伟,杨红娟..山地城市地铁牵引与制动工况下钢轨波磨成因对比研究[J].表面技术,2024,53(3):152-161,10.基金项目
国家自然科学基金面上项目(52275176) （52275176）
重庆市教委科学技术研究项目重点项目(KJZD-K202100703) （KJZD-K202100703）
交通工程应用机器人重庆市工程实验室开放课题(CELTEAR-KFKT-202004) （CELTEAR-KFKT-202004）
四川省自然科学基金(2022NSFSC0450) （2022NSFSC0450）
重庆交通大学研究生科研创新项目(YYK202208)The National Natural Science Foundation of China General Program(52275176) （YYK202208）
The Chongqing Municipal Education Commission Science and Technology Research Project Key Project(KJZD-K202100703) （KJZD-K202100703）
The Engineering Application Robot Chongqing Engineering Laboratory Open Project(CELTEAR-KFKT-202004) （CELTEAR-KFKT-202004）
The Natural Science Foundation of Sichuan Province(2022NSFSC0450) （2022NSFSC0450）
The Chongqing Jiaotong University Graduate Research and Innovation Project(YYK202208) （YYK202208）
