考虑轮轨蠕滑的高速列车制动非线性振动行为研究  

Research on nonlinear braking vibration of high-speedtrains considering wheel-rail creep

作　　者：鲁昌霖 王志伟 王权 莫继良[1,2] LU Changlin;WANG Zhiwei;WANG Quan;MO Jiliang(Institute of Tribology,Southwest Jiaotong University,Chengdu 610031,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学摩擦学研究所,成都610031 [2]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《重庆理工大学学报（自然科学）》2023年第6期10-19,共10页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(U22A20181;52205217);四川省自然科学基金项目(2022NSFSC1964)。

摘　　要：为了揭示在制动工况下轮轨蠕滑对高速列车非线性振动的影响,考虑Polach轮轨蠕滑和盘片Stribeck摩擦,建立了高速列车盘式制动系统的3自由度非线性动力学模型,采用数值积分法求解制动系统的振动响应,并与线路试验数据进行对比,验证了模型的有效性。通过该模型进一步研究了低速下盘式制动系统非线性动力学行为,对比分析了Polach轮轨蠕滑模型与双线性轮轨蠕滑模型的差异;探究了平均蠕滑率和轨面条件对制动系统振动的影响;揭示了轮轨黏着与盘式制动系统非线性行为的相互作用机理。结果表明:相比于双线性轮轨蠕滑模型,Polach轮轨蠕滑模型受车速影响更为明显,更加符合实际服役情况;平均蠕滑率增大、轨面条件变差将导致混沌运动出现时的制动压力更小,混沌-周期振动交替出现的次数增加,制动系统振动行为更为复杂。The braking system is one of the key components of high-speed trains. It is also the important guarantee for the safe operation of a train. With the continuous increase of high-speed train operation speed and the increasingly complex operating environment, safety issues of the braking system have received widespread attention. During the braking process, relative friction is generated between the brake pads and brake discs, and the friction torque reduces the wheel rotational speed through the wheel-disc relative torsion, eventually generating the braking force between the wheel and the rail to achieve train braking. However, the disc-pad friction can lead to unstable vibration of the braking system, resulting in abnormal wear of brake pads, the fracture of brake clamps and the shortening of the service life of brake discs. In addition, the unstable vibration of brake discs and pads can exacerbate wheel-rail interactions, worsen wheel-rail contact relationships, and weaken the stability of train systems, then posing a threat to the safety of train services. Therefore, it is urgent to study the friction vibration mechanism and methods for suppressing unstable vibration of high-speed train braking systems.Most of the braking system models in the existing researches only include braking devices while neglecting the adhesion relationship between the wheel and the rail when the train brakes. During train actual service, wheel-rail adhesion can lead to more complex vibration of high-speed train braking systems. Therefore, in order to more realistically reproduce the dynamic response of the braking system in the braking process, this paper establishes a three-degree-of-freedom nonlinear dynamic model of a high-speed train braking system considering Polach wheel-rail creep. The correctness of the model is also verified through train line tests. This model not only considers the wheel-disc relative torsion, but also adopts a wheel-rail creep model that can more accurately reflect the impact of wheel-rail interaction on th

关 键 词：Polach轮轨蠕滑 盘式制动系统 非线性动力学 高速列车 

分 类 号：U271.91[机械工程—车辆工程]