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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第12卷    第5期    总第68期    2015年10月

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文章编号:1672-7029(2015)05-0998-08
基于轮轨动力学的缓和曲线型道岔平面线型设计
赵卫华1,王平2,曹洋3

(1.福建工程学院福建省土木工程新技术与信息化重点实验室,福建福州 350118;
2.西南交通大学高速铁路线路工程教育部重点实验室,四川成都 610031;
3.福州大学土木工程学院,福建福州 350116
)

摘 要: 为了给缓和曲线型道岔选取合适的平面线型,满足良好的行车性能并提高侧向允许通过速度,基于轮轨动力学建立车辆-道岔动力耦合模型,以42号道岔为例计算不同线型方案下轮轨系统动力响应,且分析各评价指标与列车速度间关系。研究结果表明:道岔侧股后缓和曲线的使用可保证列车中高速通过的安全性和平稳性,增加曲线半径或加设前缓和曲线可降低轮轨系统振动剧烈程度;列车侧向通过速度越高,轮轨系统振动越显著,42号道岔侧股圆曲线半径增加500 m,可使其侧向允许通过速度提高10 km/h,缓圆缓型道岔可进一步提升。

 

关键字: 道岔平面线型;缓和曲线;动力响应;侧向过岔速度;有限单元法

Plane alignment design of turnout with the transition curve based on wheel-rail system dynamics
ZHAO Weihua1,WANG Ping2, CAO Yang3

1. Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering,
Fujian University of Technology, Fuzhou 350118, China;
2. MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China;
3. College of Civil Engineering, Fuzhou University, Fuzhou 350116, China

Abstract:In order to select proper plane alignments for turnouts with transition curves to meet good running performance and improve permissible speed through the diverging track of turnouts, a vehicle-turnout dynamic coupling model was established based on the wheel-rail dynamic method. No.42 turnout was taken as an example to calculate wheel/rail dynamic responses of various plane alignments and analyze relationships of evaluation indexes and train speeds. Results show the apply of transition curve at the back of the diverging track can ensure the safety and the stability when trains pass at medium or high speed, and adding curve radius or transition curve in the front of the diverging track can reduce the wheel/rail vibration. The higher the speed of train passing through the diverging track, the intenser the wheel/rail system vibration is. When the circular-curve radius of the diverging track of No.42 turnout was increased by 500 m, the permissible speed through the diverging track will increase 10 km/h, and that of the turnout with easement-circular-easement curve can be further increased.

 

Key words: turnout plane alignment; transition curve; dynamic response; speed through the diverging track; finite element method

ISSN 1672-7029
CN 43-1423/U

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