轨向连续多波不平顺形成机理及影响规律研究
Study on Formation Mechanism and Influence Law of Continuous Multi-wave Irregularity in Track Alignment
李毅 1徐旸 1梁晨 1杨飞 2郄录朝1
作者信息
- 1. 中国铁道科学研究院集团有限公司铁道建筑研究所,北京 100081;中国铁道科学研究院集团有限公司高速铁路轨道系统全国重点实验室,北京 100081
- 2. 中国铁道科学研究院集团有限公司基础设施检测研究所,北京 100081
- 折叠
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.
Abstract
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 irregu-larity 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 dy-namic characteristics,concluding that the additional wheel-rail force and the horizontal component of temperature cou-pling 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.
关键词
行车动力特性/离散元法/无缝线路/有砟轨道Key words
train operating dynamic characteristics/discrete element method/seamless track/ballast track bed引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据