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交通运输工程学报
JOURNAL OF TRAFFIC AND TRANSPORTATION ENGINEERING
2007 Vol.7 No.2 P.1-5

数字化期刊

列车速度对无碴轨道路基动力特性的影响

邱延峻  张晓靖  魏永幸 

摘 要:为了分析列车速度对无碴轨道路基动力影响,采用层状体系理论,结合有限元方法,建立无碴轨道路基层状有限元模型,考虑了列车荷载的不同速度对基床表层振动加速度、竖向动位移、动应力及其横向分布等路基动力特性的影响,研究了无碴轨道路基荷载作用下的力学行为.结果表明:列车速度对基床表层加速度的影响较大,竖向加速度随荷载速度的提高而增大;列车速度对基床表层动位移影响较小,速度每提高20 km·h-1,其值变化不大于0.05 mm;路基表层动应力随列车速度的提高呈现一定的波动趋势.计算结果与实测结果相似,证明了该模型的正确性.
关键词:高速铁路;无碴轨道;路基;有限元;加速度;动应力;动位移
分类号:U213.2 文献标识码:A

文章编号:1671-1637(2007)02-0001-05

Influenced of train speed on dynamic characteristics of ballastless track subgrade

Qiu Yan-jun  Zhang Xiao-jing  Wei Yong-xing 

基金项目:铁道部科技研究开发计划项目(2005K004-C)
作者简介:邱延峻(1966-),男,浙江衢州人,西南交通大学教授,工学博士,从事道路工程研究.
作者单位:邱延峻(西南交通大学,土木工程学院,四川,成都,610031) 
     张晓靖(西南交通大学,土木工程学院,四川,成都,610031) 
     魏永幸(铁道第二勘察设计院,四川,成都,610031) 

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收稿日期:2006年12月12日

出版日期:2007年4月30日

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