摘要
减振型轨道结构是控制文物振动的有效措施之一,然而,高速铁路中减振型轨道结构尚无成熟应用经验。结合兰新高铁穿越长城段项目建设功能需求,在明确长城体水平振动速度、钢轨垂向振动加速度及钢轨垂向位移等评价指标及限值基础上,采用仿真分析法开展了减振型无砟轨道减振垫刚度变化对各评价指标影响分析,分析表明:(1)长城体水平振动速度随着减振垫刚度增加而增大;(2)钢轨垂向加速度随着减振垫刚度增加而变化不大;(3)钢轨位移随着减振垫刚度增加而减小;(4)列车运营、轨道结构服役性能及长城体保护需求的减振垫刚度应介于40~166.7 MPa/m。兰新高铁工程实施采用46 MPa/m刚度减振垫,实车测试及工程应用表明:研究成果工程应用同时满足了高铁安全、平顺、舒适性和长城体高减振性能需求。
Low vibration track system( LVT) is one of the effective measures to control the vibration of cultural relics. However, there is no mature application of LVT in high-speed railway. Based on the functional requirements of Lanzhou-Urumqi high-speed railway underpassing the Great Wall and on defining the evaluation indexes and limits of the horizontal vibration speed of the Great Wall, the vertical vibration acceleration and the vertical displacement of the rail, the influence of the stiffness change of the vibration absorber pad of the ballastless track on the evaluation indexes are analyzed by simulation method. The results show that:(1) the horizontal vibration velocity of the Great Wall increases with the increase of the stiffness of the damping pad;(2) the acceleration of the rail changes little with the increase of the stiffness of the damping pad;(3) the displacement of the rail decreases with the increase of the stiffness of the damping pad;(4) the cushion stiffness should be between 40 MPa/m and 166.7 MPa/m for train operation, track structure service performance and the Great Wall protection. The 46 MPa/m stiffness cushion is used in Lanzhou-Urumqi High-speed Railway. The field test and engineering application show that the application of the research results meet the requirements of safety, smoothness, comfort and high vibration reduction performance of the high-speed railway.
作者
张红平
ZHANG Hongping(China Railway Construction Corporation(International)Limited,Beijing 100855,China)
出处
《铁道标准设计》
北大核心
2020年第2期26-30,共5页
Railway Standard Design
基金
铁道部科技研究开发计划(2010G019-B-1)
关键词
高速铁路
无砟轨道
长城
减振
刚度
工程应用
high-speed railway
ballastless-track
Great Wall
vibration attenuation
stiffness
engineering application
