摘要
高速列车的运行对轨道的平顺性和稳定性提出了更高的要求,桥路过渡段是高速铁路路基工程中最薄弱的环节之一.基于轮轨位移协调条件,建立了车-路耦合动力分析模型,计算了过渡段轨道折角不平顺和余弦型不平顺条件下系统的动力响应.计算结果表明:当列车速度为350km/h时,桥路过渡段折角不平顺不应大于0.001rad;在余弦型不平顺情况下,过渡段长度应设置为20～25m,沉降差应小于20mm.研究结果可供高速铁路桥路过渡段的设计参考.
More regularity and stability are demanded for track in high-speed railway,and subgrade-bridge transition section is one of the weakest links.Based on wheel-track displacement compatibility condition,dynamic model of train-subgrade coupling is provided,and dynamic response of system with deflection angle irregularity and cosine irregularity of track is calculated by this model.The results show that when train speed is 350 km/h,deflection angle irregularity of track in subgrade-bridge transition section should be not greater than 0.001rad;for cosine irregularity of track,the transition section should be designed as 20～25 m length,and differential settlement should be less than 20 mm.The results could provide reference for subgrade-bridge transition section design in high-speed railway.
出处
《兰州交通大学学报》
CAS
2012年第6期6-10,共5页
Journal of Lanzhou Jiaotong University
基金
长江学者和创新团队发展计划(IRT1139)
关键词
高速铁路
无砟轨道
桥路过渡段
轨道不平顺
动力响应
high-speed railway
ballastless track
subgrade-bridge transition section
track irregularity
dynamic response
