400 km/h变轨距转向架轮轴结构变形及车轴-滑动轴承接触应力分析  

Analysis of deformation of wheel-axle structure and contact stress of axle-sliding bearing of variable gauge bogie with a speed of 400 km/h

作　　者：何建明 黄志辉[1] 姜旭涛 宋杨法 HE Jianming;HUANG Zhihui;JIANG Xutao;SONG Yangfa(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;AVIC Jonhon Optronic Technology Co.,Ltd.,Luoyang,Henan 471003,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 [2]中航光电科技股份有限公司,河南洛阳471003

出　　处：《机车电传动》2022年第4期17-25,共9页Electric Drive for Locomotives

基　　金：国家自然科学基金项目(U19A20109)。

摘　　要：针对时速400公里1 435 mm/1 520 mm变轨距转向架轮轴结构变形和车轴-滑动轴承接触问题,按照EN 13104标准计算车轴轴颈垂向载荷值;基于Hertz接触理论求解轮轨接触椭圆斑半轴长,确定车轮约束区;根据轮轴结构特点,分析其车轴-滑动轴承接触关系。通过建立轮轴结构有限元模型,研究滑动轴承内孔表面树脂厚度、车轴-滑动轴承配合间隙和离心力对轮轴结构变形、车轴-滑动轴承接触压力和树脂层切应力的影响。计算结果表明:滑动轴承内孔表面有树脂层相较于无树脂层,能够减小结构变形,显著降低车轴-滑动轴承接触压力和边缘效应;车轴-滑动轴承配合间隙在0~0.3 mm以内变化,对轮轴结构变形、车轴-滑动轴承接触压力和树脂层切应力基本无影响;车辆运行速度在0~400 km/h内增加,对结构变形影响较小,但车轴-滑动轴承接触压力和树脂层切应力均呈明显非线性增长。For the deformation of the wheel-axle structure and the contact of the axle-sliding bearing of variable gauge bogie for1 435 mm/1 520 mm with a speed of 400 km/h,the vertical load values of axle journals were calculated in accordance with the standard EN 13104;based on Hertz contact theory,the semi-axis lengths of wheel-rail contact elliptical spots were solved to determine the constraint area of the wheel;according to the characteristics of the wheel-axle structure,the contact relationship of axle-sliding bearing was analyzed.The finite element model of the wheel-axle structure was established to study the effects of the thickness of resin of sliding bearing,the fit clearance between the axle and sliding bearing and centrifugal force on the deformation of the wheel-axle structure,the contact pressure of axle-sliding bearing and the shear stress of resin layer.The results of the calculations show that compared with resinfree layer,the surface of the inner hole of the sliding bearing with resin,which can reduce the structural deformation and significantly decrease the contact pressure and edge effect of axle-sliding bearing.It has little effect on the deformation of the wheel-axle structure,the contact pressure of axle-sliding bearing,and shear stress of resin layer when the fit clearance between axle and sliding bearing within 0-0.3 mm.The speed of vehicle increases in the range of 0 to 400 km/h,which has little effect on the structural deformation,but the contact pressure of the axle-sliding bearing and the shear stress of the resin layer both show obvious nonlinear growth.

关 键 词：变轨距转向架 轮轴结构 车轴-滑动轴承 结构变形 切应力 高速列车 有限元分析 

分 类 号：U292.914[交通运输工程—交通运输规划与管理]