轨道几何
磁道(磁盘驱动器)
结构工程
码头
偏转(物理)
刚度
有限元法
参数统计
几何学
桥(图论)
变形(气象学)
地质学
工程类
数学
物理
机械工程
内科学
光学
海洋学
统计
医学
作者
Hongye Gou,Zhiwen Ran,Longcheng Yang,Yi Bao,Qianhui Pu
出处
期刊:Steel and Composite Structures
[Techno-Press]
日期:2019-01-01
卷期号:32 (4): 467-478
被引量:18
标识
DOI:10.12989/scs.2019.32.4.467
摘要
Running safety and ride comfort of high speed railway largely depend on the track geometry that is dependent on the bridge deformation. This study presents a theoretical study on mapping the bridge vertical deformations to the change of track geometry. Analytical formulae are derived through the theoretical analysis to quantify the track geometry change, and validated against the finite element analysis and experimental data. Based on the theoretical formulae, parametric studies are conducted to evaluate the effects of key parameters on the track geometry of a high speed railway. The results show that the derived formulae provide reasonable prediction of the track geometry change under various bridge vertical deformations. The rail deflection increases with the magnitude of bridge pier settlement and vertical girder fault. Increasing the stiffness of the fasteners or mortar layer tends to cause a steep rail deformation curve, which is undesired for the running safety and ride comfort of high-speed railway.
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