西南交通大学学报2012，Vol.47Issue(6)：929-934,6.DOI:10.3969/j.issn.0258-2724.2012.06.004
路基上CRTSⅡ型板式轨道裂纹影响分析
Effects Analysis of Cracking of CRTS Ⅱ Slab Track on Subgrade
摘要
Abstract
In order to analyze the influences of cracking of CRTS ( China railway track system) Ⅱ slab track on subgrade on a vehicle and ballastless track, a finite element model for beam body on an elastic foundation and a vertical coupling dynamical model for a vehicle-track-subgrade system were established on the basis of the elastic foundation beam theory, the finite element method and the wheel-rail coupling dynamics theory. ANSYS/LS-DYNA, a large finite element software, was used to analyze the static and dynamic properties of track and the stability of a train under track slab cracking. The analysis results show that track slab cracking has less effect on the stress of track and has no effect on the stability and security of a train. With increase of train speed and cracking of track slab, the wheel-rail force and the dynamic responses of track become bigger, so vibration reduction or vibration isolation and control measures of the track geometric irregularity should be adopted to reduce the dynamic responses of track in the crack area. The cracking of track slab has effects on the durability and lifetime of ballastless track, so it should be repaired in time.关键词
裂缝/CRTSⅡ型板式轨道/力学性能/动力响应Key words
crack/ CRTS (China railway track system) Ⅱ slab track/ mechanical property/ dynamic response分类
交通工程引用本文复制引用
王平,徐浩,陈嵘,徐井芒..路基上CRTSⅡ型板式轨道裂纹影响分析[J].西南交通大学学报,2012,47(6):929-934,6.基金项目
国家自然科学基金资助项目(51008258) （51008258）
铁道部科技研究开发计划资助项目(2010G006-B) （2010G006-B）
