摘要
应用列车-线路耦合动力学理论,分析了高速铁路无砟轨道关键设计参数,包括设计轮重、疲劳检算轮重、轨道合理刚度、路桥过渡段路基面支承刚度、路基不均匀沉降、轨面变形折角及钢轨挠度变化率.结果表明：设计轮重可取为静轮重的3.0倍;疲劳检算轮重系数可取为1.50;轨下基础刚度的合理范围为20-30 MN/m;路桥过渡段路基面支承刚度的合理值为500-1 000 MPa/m;路基不均匀沉降幅值、轨面变形折角和钢轨挠度变化率应分别控制在波长的1.0‰、1.5‰及0.3 mm/m以下.
The key design parameters for ballastless track of high-speed railway were analyzed using the theory of train-track coupled dynamics.The parameters under study include the design wheel load,wheel load for fatigue check,track stiffness,supporting stiffness of subgrade in the subgrade-bridge transition section,uneven subgrade settlement,deflection angle of rail surface,and change rate of rail deflection,and their values suggested by dynamic analyses are 3.0 times as large as the static wheel load,1.50,20-30 MN/m,500-1 000 MPa/m,and less than one thousandth of the wave length of uneven subgrade settlement,1.5‰,and 0.3 mm/m,respectively.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2010年第4期493-497,共5页
Journal of Southwest Jiaotong University
基金
国家科技支撑计划资助项目(2009BAG12A01-A03-1)
国家973计划资助项目(2007CB714700)
全国博士学位论文作者专项资金资助项目(2007B56)
西南交通大学创新团队培育计划(2007IRT06)
关键词
高路铁路
无砟轨道
列车-线路耦合动力学
设计参数
high-speed railway
ballastless track
train-track coupled dynamics
design parameter
