铁道标准设计2018，Vol.62Issue(2)：6-11,6.DOI:10.13238/j.issn.1004-2954.201704060005
高速铁路无砟轨道路基填料动力试验荷载分析
Analysis of Dynamic Test Load on Filler of Ballastless Track Subgrade of High Speed Railway
摘要
Abstract
In order to obtain dynamic test parameters for filler of ballastless track subgrade of high speed railway,a three-dimensional finite element model of the ballastless track-subgrade system is established to simulate the operation process of the eight-car train and the effects generated by track irregularities,train speed,axel load and subgrade depth on the vertical dynamic stress of the subgrade are analyzed based on the measuring data.The analyses indicate that one loading cycle of dynamic stress of subgrade is completed by two axles loading of the same bogie or four axles loading of the adjacent bogie.The dynamic stress amplitude changes little with the change of speed,and the frequency of the dynamic stress acting on subgrade increases linearly with train speed.The dynamic stress increases about 0.97 kPa while the axle load increases by 10 kN.The frequency of the dynamic stress acting on subgrade is 1 to 4 times the fundamental frequency generated by the vehicle length,and the principal frequency of the dynamic stress is not affected by track irregularity.According to the characteristics of the dynamic stress time-history and the frequency,a load expression for dynamic test of subgrade filler is established with whole pressure sine function and the loading frequency may be 1 to 3 times the fundamental frequency generated by the vehicle length.关键词
高速铁路/无砟轨道/路基/填料/动力试验/频率Key words
High speed railway/Ballastless track/Subgrade/Filler/Dynamic test/Frequency分类
交通工程引用本文复制引用
王启云,欧阳恒,张丙强,陈军浩,赵卫华..高速铁路无砟轨道路基填料动力试验荷载分析[J].铁道标准设计,2018,62(2):6-11,6.基金项目
国家自然科学基金项目(51508097,51508098) （51508097,51508098）
福建省自然科学基金资助项目(2015J05090),福建省教育厅科研项目(JA13213) （2015J05090）
