中文摘要：

针对大秦线重载铁路固定辙叉磨耗问题,基于实测轮/叉型面,建立了标准JM3车轮型面和磨耗车轮型面与标准辙叉和磨耗辙叉接触模型.详细分析了每种轮/叉的接触情况,如接触斑面积、等效应力等的变化规律.研究发现标准轮/叉接触时,其接触表面发生塑性变形的范围最大.磨耗轮与标准辙叉接触时,最大等效应力最大.磨耗轮/叉接触时,轮/叉型面匹配性能最好.综上轮/叉间存在少量磨耗时型面匹配性能较好,因而在使用过程中尽可能控制轮/叉间的磨耗,以延长辙叉的使用寿命,降低铁路运营成本.

英文摘要：

Based on the situation of the attrition to the heavy haul railway fixed frog used in Da-Qin line,severalcontact models are built between the profile of standard JM3 wheel/worn wheel and the standard/wornturnout, which are all practically measured. The contact condition of each wheel/turnout is analyzed, such asthe variation of the contact patch area and equivalent stress, and is found out the largest range of plastic deformationoccurred when the standard wheel/turnout contact and the maximal von mises equivalent stress occurredwhen the worn wheel/standard turnout contact. In addition, the contact profile matching of the wornwheel/turnout contact is the best. In summary, a litde abrasion between the wheel/turnout contact is good tothe contact profile matching of them. Therefore, wear control in the wheel/turnout contact can prolong the lifeof frog and decrease the operating cost.