钢弹簧浮置板轨道焊接接头处钢轨波磨研究Ⅱ:成因分析  

Study on the Rail Corrugation at Weld Joint of Steel Spring Floating Slab TrackⅡ:Formation Mechanism

作　　者：李霞 吴磊[3] 温泽峰[2] 金学松[2] 王安斌[1] LI Xia;WU Lei;WEN Zefeng;JIN Xuesong;WANG Anbin(School of Urban Railway Transportation,Shanghai University of Engineering Science,Shanghai 201620;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031)

机构地区：[1]上海工程技术大学城市轨道交通学院,上海201620 [2]西南交通大学轨道交通运载系统全国重点实验室,成都610031 [3]西南交通大学机械工程学院,成都610031

出　　处：《机械工程学报》2025年第6期260-267,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(52002343,52202477);四川省科技计划(2020YJ0034);西南交通大学轨道交通运载系统全国重点实验室开放课题(RVL2402);西南交通大学高速铁路线路工程教育部重点实验室开放研究基金资助项目。

摘　　要：某地铁钢弹簧浮置板直线轨道上焊接接头处出现了250~600 mm的长波波磨,该处行车速度约为60 km/h,波磨通过频率为28~67 Hz。现场试验采用力锤敲击法获取浮置板轨道结构的振动特性。建立刚柔耦合的地铁车辆-浮置板轨道耦合动力学模型,模型中车体考虑为刚性体,钢轨采用铁木辛柯梁模拟,轨道板和衬砌采用三维实体单元模拟,剪力铰用梁单元模拟,以此分析轨道结构振动特性、轮轨蠕滑特性和轮轨力与波磨的相关性;建立簧下质量-浮置板轨道结构有限元模型,将其与动力学模型相结合,分析焊接接头处波磨的形成机理。研究发现,该焊接接头处的长波波磨属于P2共振型波磨,其形成机理是簧下质量与钢轨作为整体相对于浮置板的振动。同时钢轨相对于浮置板的横向振动和扭转振动、轮轨法向力和轮轨横向蠕滑率的波动也是该处波磨形成和演化的重要因素。The long-wavelength of 250-600 mm has been observed on a straight line of steel spring floating slab track in a metro of china.The operation speed is approximately 60 km/h and the corrugation-passing frequency is 28-67 Hz.A test was performed with an impact hammer to identify the actual vibration response of the floating slab track.A rigid-flexible metro vehicle and floating slab track dynamic model is established,in which the car body is considered as a rigid body,the rail is simulated by Timoshenko beam,the slab and lining are simulated by three-dimensional solid elements,and the shear force dowels are simulated by beam elements.This dynamic model is used to study the correlation between the vibration response of track,the creep characteristic of wheel-rail,the wheel-rail force and the corrugation.The three-dimensional finite element model of unsprung and floating slab track is established,which is used to analyze the formation mechanism of corrugation combined with the vehicle-track dynamic model.Numerical results show that the long-wavelength corrugation at the weld joint belongs to P2 resonance corrugation,and its formation mechanism is the vibration of the unsprung mass and the rail as whole relative to the floating slab.The lateral and torsional vibration of the rail relative to the floating slab,the fluctuation of wheel-rail normal force and the wheel-rail lateral creepage are also important factors for the formation and evolution of corrugation.

关 键 词：钢轨波磨 钢弹簧浮置板轨道 焊接接头 形成机理 振动 

分 类 号：U260[机械工程—车辆工程]