摘要
车轮扁疤是高速列车服役过程中的一种典型失效现象,其产生的剧烈轮轨激励将严重威胁列车行车安全。为探明其影响机制,建立考虑制动系统与轮对柔性变形的车辆刚柔耦合动力学模型,该模型详细考虑了制动摩擦、轮轨关系、车轮扁疤等非线性因素,可反映服役过程中轮轨激扰作用下制动系统的动态响应。通过与线路试验数据对比,验证了模型的正确性。基于此,研究不同车轮扁疤长度与不同制动速度下的制动系统动态响应。结果表明:车轮扁疤会使轮轨垂向力、纵向蠕滑力、制动系统振动和界面摩擦等动态响应更剧烈;在制动速度较低时,扁疤长度对制动系统动态响应的影响更显著;扁疤长度一定时,随着速度增加,制动系统各部件振动的加速度先增大后减小,并在制动速度100 km/h左右时达到最大值。该研究可为制动系统设计优化提供参考。
Wheel flat is a common failure in the operation of high-speed trains,which seriously threatens the train safety.As the core component to ensure the safety of high-speed trains,the dynamic performance of braking system is affected by wheel-rail excitation.To study the effect of wheel flat on the dynamic response of the braking system,a rigid-flexible coupling dynamic model of the vehicle is built considering the brake system and the flexible deformation of the wheelset.The model considers the nonlinear factors such as brake friction,wheel-rail relationship and wheel squalling in detail,truly reflecting the dynamic response of the braking system under the action of wheel-rail excitation.Then,the correctness of the model is verified by comparing with the experimental data of the circuit.Based on this,the effects of different wheel flat lengths and different braking speeds on the dynamic response of the braking system are investigated.The results indicate that wheel flats lead to more intense dynamic responses in wheel-rail vertical force,longitudinal creep force,braking system vibration,and interface friction.At lower braking speeds,the length of the flat has a more pronounced impact on the dynamic response of the braking system.When the flat length is constant,the vibration acceleration of each component in the braking system initially increases and then decreases with increasing speed,reaching its maximum at approximately 100 km/h.This paper can provide valuable insights for the design and optimization of braking systems.
作者
蒋树
王志伟
楚明
杨林川
莫继良
范志勇
JIANG Shu;WANG Zhiwei;CHU Ming;YANG Linchuan;MO Jiliang;FAN Zhiyong(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)
出处
《重庆理工大学学报(自然科学)》
北大核心
2025年第8期182-189,共8页
Journal of Chongqing University of Technology:Natural Science
基金
国家自然科学基金项目(U22A20181,52205217)
轨道交通运载系统全国重点实验室自主课题(2024RVL-T09)
中央高校基本科研业务费专项基金项目(2682023CX026)
中国科协青年人才托举工程项目(2022QNRC001)。
关键词
车轮扁疤
制动系统
刚柔耦合
高速列车
动力学
wheel flat
braking system
rigid-flexible coupling
high-speed train
dynamics
