高弹扣件轨道车轮间振动波的反射对钢轨短波长波磨的影响  

Effects of vibration wave reflections between wheels and tracks with high-elasticfasteners on short pitch rail corrugation

作　　者：王誉蓉 吴天行[1] WANG Yurong;WU Tianxing(Institute of Vibration,Shock and Noise,Shanghai Jiao Tong University,Shanghai 200240,China;School of Mechanical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]上海交通大学振动、冲击与噪声研究所,上海200240 [2]宁夏大学机械工程学院,银川750021

出　　处：《振动与冲击》2020年第6期29-36,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金( 11572188 );宁夏自然科学基金(2019AAC03026)。

摘　　要：地铁线路使用高弹扣件的直、曲线段均出现严重的短波长钢轨波磨(25 mm^30 mm)。针对该问题,在时域建立多车轮板式轨道系统模型研究了车轮间钢轨振动波反射而引起的垂向动态轮轨作用力。轮轨之间非线性的滚动接触等效为二维接触模型,其中纵向滑移区内的磨损与切应力引起的摩擦功成比例。综合瞬时轮轨动力学、接触力学和轮轨的长期磨损,对单、多轮轨作用下高弹扣件地铁线路以及普通扣件线路中钢轨波磨的进化过程分别进行仿真,通过对比结果表明使用高弹扣件地铁线路钢轨短波长波磨异常增长主要原因是钢轨振动波在临近车轮间的反射使得垂向动态接触力剧烈波动而加速轮轨间的不均匀磨损。最后,调频钢轨吸振器(TRD)引入系统模型并分析了其对这类短波长波磨的抑制作用,仿真结果表明TRD可以有效缓解车轮间的振动波反射以及相关的短波长波磨的异常增长。Short pitch rail corrugation(25 mm—30 mm)has been observed at both curved and tangent tracks of metro,where high-elastic rail fasteners were used.To address it,the time-domain model for a slab track system coupled with four wheels was developed to determine the vertical dynamic wheel-rail interaction forces due to wave reflections,which were considered to have the main effects on the formation of corrugation.The non-linear rolling contact between the wheels and rail was modeled as a two-dimensional model,in which the wear at the longitudinal slip zone was assumed to be proportional to the frictional work done by tangential stresses.Combinedly using the transient wheel/rail dynamics,contact mechanics and long-term wear,mechanism,the evolution processes of rail corrugation under single and multiple wheel/rail interaction were simulated for the slab track systems with high-elastic rail fasteners as well as with normal rail fasteners respectively.The results show that wave reflections between moving wheels and rail lead to the dramatical fluctuation of contact forces and thusly the abnormal growth of uneven rail corrugation.Finally,the effects of tuned rail damper(TRD)on this specific rail corrugation were investigated.The simulation results show that wave reflections among wheels may be attenuated effectively by TRD and thereby short pitch rail corrugation may be mitigated as well.

关 键 词：钢轨波磨 振动波 滚动接触 磨损 调频钢轨吸振器(TRD) 

分 类 号：TB533[理学—物理] U213[理学—声学]