Dynamic Design of Stiffness Transition of Turnout in Ballastless Track of Suining-Chongqing Railway
YAO Li1, YAN Hua1, CAI Cheng-biao2
1.The Second Survey & Design Institute of China Railway, Sichuan, Chengdu 610031, China; 2.Southwest Jiaotong University, Sichuan, Chengdu 610031, China
Abstract：Research purposes: The main purposes of research are to clarify the stiffness characteristic of block section and turnout area in integral trial section for ballastless track on Suining-Chongqing Railway. In order to improve comfortableness and prolong the service life of the track structure, the stiffness transion should be set between block section and turnout area. And this paper proposes the transition design between block section and turnout area on Suining-Chongqing railway.
Research methods: Based on a theory of train-track coupling dynamics model, the stiffness characteristic of ballastless track in block section and in turnout area in the Suining-Chongqing Railway is analyzed.
Research results: There is more track stiffness difference between block section and turnout area. Results obtained from the paper show that track stiffness in turnout area is 2~3 times as track stiffness in block section of integral trial section for ballastless track on Suining-Chongqing Railway. Track stiffness transitions should be set there.
Research Conclusions: The method of the hierarchical track stiffness can be applied in the stiffness transition section of the turnout and the stiffness is set about 18 sleeper spaces per grade. When the dynamic slope of the deflection of rail is less than 0.3 mm/m, the dynamic performance of the stiffness transition of turnout is satisfactory.
姚力，颜华，蔡成标. 遂渝线无碴道岔前后轨道刚度过渡段动力学设计[J]. 铁道工程学报, 2006, 23(7): 37-40.
YAO Li, YAN Hua, CAI Cheng-biao. Dynamic Design of Stiffness Transition of Turnout in Ballastless Track of Suining-Chongqing Railway. 铁道工程学报, 2006, 23(7): 37-40.
2006, Vol. 23 
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