摘要
轨向连续多波不平顺相比于普通轨道不平顺更容易影响高速铁路的行车安全,由于对多波不平顺形成机理的研究基本空白,造成了相应整治措施缺乏,局部新建线路必须换轨的情况。通过车辆-多波不平顺轨道耦合动力学模型,轮轨及温度力耦合作用下有砟道床变形演变离散元模型,系统揭示了多波不平顺形成机理及对行车动力特性的影响,认为轮轨附加力及无缝线路温度耦合力的水平分量是造成多波不平顺的主要原因,成果可为我国高速铁路轨道结构的安全服役提供理论支撑。
Compared with ordinary track irregularity,continuous multi-wave irregularity in track alignment is more likely to affect the running safety of high-speed railway.The lack of research on the formation mechanism of multi wave irregularity causes a lack of corresponding remediation measures,which results in track replacement for some newly-built lines.Through the vehicle-track coupling dynamic model with multi-wave irregularity in track alignment and the discrete element model of deformation evolution of ballast bed under the coupling action of wheel-rail and temperature force,this paper systematically revealed the formation mechanism of multi-wave irregularity and its influence on train operating dynamic characteristics,concluding that the additional wheel-rail force and the horizontal component of temperature coupling force of seamless track are the main causes of multi-wave irregularity.The results can provide theoretical support for the safe service of high-speed railway track structure in China.
作者
李毅
徐旸
梁晨
杨飞
郄录朝
LI Yi;XU Yang;LIANG Chen;YANG Fei;QIE Luchao(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory for Track System of High-speed Railway,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2024年第8期96-101,共6页
Journal of the China Railway Society
基金
中国铁道科学研究院集团有限公司科研项目(2021YJ063)
中国国家铁路集团有限公司科技研究开发计划(K2021G015)。
关键词
行车动力特性
离散元法
无缝线路
有砟轨道
train operating dynamic characteristics
discrete element method
seamless track
ballast track bed
