缩尺车轮-环轨滚动接触与磨耗特性仿真分析  

Rolling contact and wear characteristics simulation analysis of scaled wheel-ring rail

作　　者：罗易飞 胡彬 赵鑫[1] 温泽峰[1] LUO Yifei;HU Bin;ZHAO Xin;WEN Zefeng(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《浙江大学学报（工学版）》2024年第6期1275-1284,共10页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(52027807);四川省国际科技创新合作资助项目(2021YFH0006);牵引动力国家重点实验室自主课题资助项目(2020TPL_T06)。

摘　　要：为了研究缩尺车轮-环轨滚动接触与磨耗特性,基于轮轨滚动行为(WRRB)模拟试验台参数,利用ANSYS/LS-DYNA建立瞬态滚动接触有限元模型,集成弹性蠕滑率求解程序和Tγ磨耗模型,通过试验验证模型的正确性.重点分析轮轨力、蠕滑率、接触应力和钢轨磨耗深度,并考虑车轮驱动扭矩和速度的影响规律.结果表明:缩尺车轮-环轨结构的高频弹性振动造成轮轨垂向力波动;在比例载荷作用下,纵向动力学行为和钢轨磨耗深度变化趋势与服役轮轨一致;由于环轨的极小曲线半径,自由滚动工况下的横向蠕滑力/率、自旋蠕滑率、钢轨磨耗深度偏大,切向接触应力峰值出现在接触斑后沿两侧;车轮驱动扭矩和速度的影响规律可拟合为一组经验公式.研究可以为此类试验台的设计与应用工作提供理论依据.A transient rolling contact finite element model using ANSYS/LS-DYNA was developed based on the parameters of the wheel-rail rolling behavior(WRRB)test rig,in order to study the rolling contact and wear characteristics of scaled wheel-ring rail.The elastic creepage solving program and Tγwear model were integrated in the model,and the model was verified by experiment.The wheel-rail force,creepage,contact stress and rail wear depth were investigated,and the influences of wheel driving torque and speed were analyzed.The results showed that,the vertical wheel-rail force fluctuation was caused by the high frequency elastic vibration of the scaled wheelring rail structure.The longitudinal dynamic behavior and rail wear depth change trend were consistent with those of in-service wheel-rail under proportional load.Due to the small curve radius of the ring rail,the creep force and rate,the spin creepage and the rail wear depth under free rolling condition were large,and the peak value of tangential contact stress appeared on both sides behind the contact patch.The influence rules of wheel driving torque and speed can be fitted into a set of empirical formulas.The research can provide a theoretical basis for the design and application of this kind of test rig.

关 键 词：缩尺车轮-环轨 显式有限元法 瞬态滚动接触 蠕滑 磨耗 

分 类 号：U211.5[交通运输工程—道路与铁道工程]