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中南大学学报(自然科学版)

Journal of Central South University

第51卷    第9期    总第313期    2020年9月

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文章编号:1672-7207(2020)09-2673-08
客运列车曲线超速引起的脱轨全过程计算
龚凯1,刘林芽1,向俊2,罗锟1

(1. 华东交通大学 铁路环境振动与噪声教育部工程研究中心,江西 南昌,330013;
2. 中南大学 土木工程学院,湖南 长沙,410075
)

摘 要: 为研究客运列车因曲线超速引起的脱轨规律,基于列车-轨道系统空间振动计算模型,建立客运列 车-曲线轨道系统空间振动计算模型。基于该模型,根据列车脱轨能量随机分析方法,提出客运列车曲线超速引起的脱轨全过程计算方法,计算不同曲线半径、外轨超高下列车超速引起的脱轨全过程,分析轮轨接触状态及其相对位置。研究结果表明:据脱轨系数和轮重减载率难以判定客运列车超速时是否脱轨;脱轨车辆位于编组前部,在脱轨前及时预警十分必要;随着曲线半径、外轨超高增大,列车脱轨速度随之增大,脱轨瞬间转向架与钢轨横向相对位移也随之增大;并考虑安全系数1.25,得到转向架与钢轨横向相对位移最大为60.2 mm,这可为研发客运列车曲线超速脱轨报警装置提供参考。

 

关键字: 铁道工程;客运列车;曲线超速;脱轨;脱轨报警装置

Calculation of passenger train derailment course induced by overspeeds in curve
GONG Kai1, LIU Linya1, XIANG Jun2, LUO Kun1

1. Engineering Research Center of Railway Environmental Vibration and Noise, Ministry of Education, East China Jiaotong University, Nanchang 330013, China;
2. School of Civil Engineering, Central South University, Changsha 410075, China

Abstract:In order to research passenger train derailment law induced by overspeeds in curve, the spatial vibration calculation model of the system between passenger train and curve track was established based on the spatial vibration calculation model of the system between train and track. According to the energy random analysis theory of train derailment, the derailment course calculation method of passenger train induced by overspeeds in curve was presented. The derailment processes calculation of the passenger train were achieved in different conditions of curve radius and elevation of curve, and the wheel-rail contact state and the relative position were analyzed. The results show that it is difficut to use the derailment coefficient and the wheel load reduction rate to determine whether the derailment occurs for the passenger train overspeeds in curve. The derailment vehicles are mainly located in the front of the formation when the passenger train derails induced by overspeeds in curve, and timely warning is necessary before the train derails. The train derailment speed and lateral relative displacement between bogie and rail increase with the increase of the curve radius and elevation of curve. Considering the safety factor of 1.25, the relative displacement between bogie and rail is 60.2 mm. The results can provide reference for the development of the passenger train derailment alarm device induced by overspeeds in curve.

 

Key words: railway track engineering; passenger train; overspeeds in curve; train derailment; wheel derailment alarm device

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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