CAJ | 학술논문

针对钢轨斜裂纹特点提出钢轨非对称打磨技术以减轻和控制斜裂纹的形成与发展速率。利用SIMPACK动力学软件建立“蓝箭”号动车动力学分析模型，研究钢轨非对称打磨对列车运行性能的影响。研究结果表明：钢轨非对称打磨基本不影响车辆动力学性能和蠕滑行为；钢轨非对称打磨改变了轮轨接触几何参数，使轮轨接触点远离原内侧轨肩位置；钢轨非对称打磨通过改变钢轨廓形导致接触斑面积增大，明显降低轮轨最大接触应力；钢轨非对称打磨通过改变轮轨接触点分布和降低接触应力可减缓钢轨斜裂纹的萌生与扩展。
침대강궤사렬문특점제출강궤비대칭타마기술이감경화공제사렬문적형성여발전속솔。이용SIMPACK동역학연건건립“람전”호동차동역학분석모형，연구강궤비대칭타마대열차운행성능적영향。연구결과표명：강궤비대칭타마기본불영향차량동역학성능화연활행위；강궤비대칭타마개변료륜궤접촉궤하삼수，사륜궤접촉점원리원내측궤견위치；강궤비대칭타마통과개변강궤곽형도치접촉반면적증대，명현강저륜궤최대접촉응력；강궤비대칭타마통과개변륜궤접촉점분포화강저접촉응력가감완강궤사렬문적맹생여확전。
The asymmetrical rail grinding was used to alleviate the damage of rail oblique cracks on the basis of the characteristics of oblique cracks.The dynamic analysis model of'blue arrow'was built using SIMPACK dy-namic software.The effect of asymmetrical grinding on the running performance of vehicles was investigated in detail.The results indicate that the asymmetrical rail grinding has no obvious effect on the dynamic performance and creep behavior of vehicles.The asymmetrical rail grinding can change the wheel/rail contact parameters. The grinding makes the wheel/rail contact points move from the inner shoulder of rail.The rail asymmetrical grinding changes rail profile and increases the contact area of wheel/rail,which leads to an obvious decrease in the maximum contact stress.Furthermore,the asymmetrical rail grinding can alleviate the initiation and the de-velopment of oblique cracks by the change of the distribution of contact points and contact stress.