中国铁道科学2017，Vol.38Issue(3)：19-24,6.DOI:10.3969/j.issn.1001-4632.2017.03.03
重载铁路道岔区轨道刚度的分布及均匀化
Distribution and Homogenization of Track Stiffness in Turnout Area of Heavy Haul Railway
摘要
Abstract
Aiming at the problem of the excessive dynamic impact of wheel and rail caused by the uneven distribution of track stiffness in the turnout area of heavy haul railway,the full-size three-dimensional finite element model was established with MIDAS software for the No.12 fixed frog turnout of 75 kg · m-1 rail in its full length range to study the distribution of the overall stiffness of the track in the full length range of turnout area.Results show that the maximum stiffness of the inner rail in turnout area is 285 kN · mm-1,and the maximum difference between it and track stiffness in block section is 165 kN · mm-1.The maximum stiffness of the stock rail in turnout area is 178 kN · mm 1,and the maximum difference between it and track stiffness in block section is 57 kN · mm-1.In order to realize the homogenization of the track stiffness in turnout area,technical solution was proposed to adjust the stiffness of long heavy rubber pad under iron plate.Field tests show that the proposed scheme can reduce the maximum stiffness of the inner rail in turnout area by about 17％ and the maximum stiffness of the stock rail by about 16％.In this way,the track stiffness in turnout area is basically the same as that in block section.The inherent track stiffness irregularity in turnout area is basically eliminated and wheel-rail interaction is effectively reduced.关键词
重载铁路/道岔/轨道刚度/分布/均匀化Key words
Heavy haul railway/Turnout/Track stiffness/Distribution/Homogenization分类
交通工程引用本文复制引用
孙加林..重载铁路道岔区轨道刚度的分布及均匀化[J].中国铁道科学,2017,38(3):19-24,6.基金项目
中国铁路总公司铁道科学技术研究发展中心项目(J2011G010) （J2011G010）
