西南交通大学学报2011，Vol.46Issue(2)：189-194,6.DOI:10.3969/j.issn.0258-2724.2011.02.002
路基上纵连板式无砟轨道动力特性分析
Dynamic Analysis of Longitudinally Connected Ballastless Track on Earth Subgrade
摘要
Abstract
A coupled dynamic model of train-longitudinally connected ballastless track on earth subgrade was established. In the model, the track and subgrade were regarded as a layered viscoelastic body, which was modeled on continuum theory, and discretized with Galerkin method. The model was used to analyze the dynamics of ballastless track on earth subgrade of the Beijing-Tianjin high-speed railway as the CRH2-300 EMUs running at speeds of 300 and 350 km/h. The calculated results were compared with measured data, which verified reliability of the proposed model. The results show that the maximum stresses in CA( cement asphalt) mortar are 46.8-50.5 kPa, much less than the design specification of 15 MPa; dynamic deformations of subgrade decrease slowly with depth, while dynamic stresses decrease rapidly; dynamic stresses produced by a single bogie distribute about 5. 00 and 3.25 m longitudinally and laterally, respectively; and the distribution of dynamic deformations in slab, CA mortar layer and supporting layer have a little difference along the depth direction.关键词
纵连板式无砟轨道/路基/动力学/高速铁路Key words
longitudinally connected ballastless track/ subgrade/ dynamics/ high-speed railway分类
交通工程引用本文复制引用
徐鹏,蔡成标..路基上纵连板式无砟轨道动力特性分析[J].西南交通大学学报,2011,46(2):189-194,6.基金项目
国家科技支撑计划资助项目(2009BAG12A01-A03-1) （2009BAG12A01-A03-1）
国家973计划资助项目(2007CB714700) （2007CB714700）
全国博士学位论文作者专项资金资助项目(2007B56) （2007B56）
中央高校基本科研业务费专项资金资助项目(2010XS35) （2010XS35）
