摘要
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： By analyzing the effect on impact force between wheel and rail by track irregularity, technical evidences on limit of irregularity on rail welded joints are provided. Research conclusions：By the measure experiment on the spot to compare of impact force between wheel and rail and track structure vibrational acceleration, the results show that effect on impact force between wheel and rail is distinct by irregularity on rail welded joints. Especially when wavelength of the irregularity on track surface at the size is inconsistent, the effects on the P1 and P2 are inconsistent as well as. At the same time , it shows that P2 can be reduced distinctly by the improvement of irregularity on rail welded joints, so that stress of track structure can be reduced.
出处
《铁道工程学报》
EI
北大核心
2008年第9期35-38,共4页
Journal of Railway Engineering Society
关键词
高速铁路
钢轨焊接接头
轮轨力
high speed railway
rail welded joints
force between wheel and rail
