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研究目的:为了研究轨道不平顺对轮轨作用力的影响,从而为钢轨焊接接头不平顺限值提供技术依据。研究结论:通过对比研究不同焊接接头轨面不平顺条件下的轮轨作用力和轨道结构的振动加速度大小现场动测试验,表明钢轨焊接接头的平顺性对轮轨作用力的影响较大,特别是当轨面平顺性大小波长不一致时,对P1和P2力的影响也不一致。由理论分析可知,P1力只对钢轨表面伤损产生较大影响,而P2力则对轨道结构所有的部件都有较大影响。研究表明,提高钢轨焊接接头的轨面平顺性,可有效降低P2力,从而达到降低轨道结构部件的应力水平的目的。
Research purposes: In order to study the influence of track irregularity on the wheel-rail force, the technical basis for the non-smooth rail joint weld limit is provided. Research conclusions: The field tests on the wheel-rail interaction force and the vibration acceleration of the rail structure under different track irregularities of welded joints show that the smoothness of the rail welded joints has a great influence on the wheel-rail forces, especially When the magnitude of the orbital smoothness is inconsistent, the influence on P1 and P2 forces is also inconsistent. From the theoretical analysis, we can see that the P1 force only has a greater impact on the rail surface damage, while the P2 force has a greater impact on all components of the track structure. The research shows that increasing the rail surface smoothness of rail welded joints can effectively reduce the P2 force, so as to reduce the stress level of the rail structural components.