中文摘要：

利用轮轨型面测量仪测量了SS4机车JM3型磨耗车轮型面和小半径曲线钢轨型面,采用样条曲线拟合方法获得了车轮几何型面,选取5种不同磨耗程度的车轮型面,建立了三维轮轨接触有限元模型,计算了轮轨接触斑面积和接触应力。计算结果表明：Ⅰ型车轮与磨耗钢轨接触时,接触斑面积最小,仅为183 mm2,Von Mises应力最大值为1 459 MPa,应力主要集中在轮缘根部;Ⅱ型车轮与磨耗钢轨接触时,接触斑面积为294 mm2;Ⅲ型车轮与磨耗钢轨接触时,接触斑面积明显增大,Von Mises应力最大值为1 137 MPa,应力分布比较均匀,轮缘磨耗减缓;Ⅳ型车轮与磨耗钢轨接触时,Von Mises应力最大值为890 MPa;Ⅴ型车轮与磨耗钢轨接触时,Von Mises应力最大值为953 MPa,但轮缘磨耗已到极限。

英文摘要：

The wear wheel profile of JM3 type of SS4 locomotive and the profile of rail with small radius curve were measured by using wheel/rail instrument,and wheel geometric profiles were obtained by using spline curve fitting method.Five different degrees of wheel profiles were chosen,a 3D wheel/rail contact finite element model was built,and wheel/rail contact plaque areas and contact stresses were calculated.Calculation result indicates that when Ⅰ type wheel contacts with wear rail,contact plaque area is smallest,only 183 mm2.The maximum Von Mises stress is 1 459 MPa,and contact stress mainly concentrates wheel flange root.WhenⅡtype wheel contacts with wear rail,contact plaque area is 294 mm2.When Ⅲ type wheel contacts with wear rail,contact plaque area increases significantly.The maximum Von Mises stress is 1 137 MPa,contact stress distribution is relatively uniform,and flange wear slows down.When Ⅳ type wheel contacts with wear rail,the maximum Von Mises stress is 890 MPa,When Ⅴ type wheel contacts with wear rail,the maximum Von Mises stress is 953 MPa,but flange wear has reached limit state.1 tab,9 figs,12 refs.