摘要研究目的：我国正在进行大规模的客运专线建设,其中时速250 km的客运专线占有相当大的比重。无砟道岔作为客运专线的重大基础设备,其轨道刚度影响动车组过岔时的安全性和平稳性,需进行合理设置。根据线路运营条件,运用理论分析,开展客运专线无砟道岔轨道刚度取值研究,为确定我国250 km /h客运专线无砟道岔的合理轨道刚度提供理论指导。
Abstract：Research purposes: In China，the construction of passenger dedicated line is in progress on a large scale and in which the the majority are the 250 km／h ones．As the important infrastructure of passenger dedicated line，the stiffness of ballastless track turnout influences the safety and stability of the track，So it needs reasonable designed．According to the operating conditions of track．the research was done on the stiffness value of ballastless track turnout of passenger dedicated line with theoretical analysis for providing the theoretical guidance for determining the reasonable stimless of ballastless track turnout of 250 km／h passenger dedicated line．
Research conclusions: From five aspects of comfortableness，stress，vibration，deformation，and matching components stiffness，the criterions for determining the reasonable stiffness of the turnout were proposed．The method for determining the track stiffness was also established by using the vehicle—turnout space coupling dynamic analysis and track deformation analysis． With this，the research Was done on reasonable stiffness of ballastless track turnout of 250 km／h passenger dedicated line．The research results showed that stiffness of 36～44 kN／mm to the fastening．The stiffness of 290. 330 kN／mm to the rubber pads under rail，and the stiffness of 40—50 kN／mm to the rubber pads under tie plate were reasonable．
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2010, Vol. 27 
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