表面技术2025，Vol.54Issue(5)：143-153,11.DOI:10.16490/j.cnki.issn.1001-3660.2025.05.011
扣件弹条结构和安装参数对地铁短波波磨的影响
Effect of Structure and Installation Parameters of Fastener Clips on the Short-pitch Corrugation of Rails
摘要
Abstract
Rail corrugation is periodic and non-uniform wear on the rail running surface along the longitudinal direction.It results in vibration and noise,component loosening,detachment and fatigue failure,posing a threat to operation safety and deteriorating the riding experience.It is an important way to solve corrugation by revealing the causes and affecting factors of rail corrugation to propose measures against rail corrugation at the source.The existing theories used to study the corrugation can be divided into two categories of feedback vibration and self-excited vibration.The unstable vibration of the wheel-rail system is accepted as main cause of the corrugation on minor diameter curved rails.However,the rail corrugation modeling established on the basis of friction-induced vibration theory hardly accounts for the fastener clip,which may affect the prediction results.The effect of the fastener clip on rail corrugation is not be considered by the traditional corrugation model. In order to investigate the matter of the rail corrugation on a curved rail through Cologne-egg fasteners supported,the frictional-induced vibration finite element model was established,and the stability of the wheel-rail system under saturated creep force was analyzed by complex eigenvalue analysis method.In the model,the Cologne-egg fasteners were simulated with two types of spring elements.The rubber pad of the fastener was simplified as 28 massless spring elements supported between the rail bottom and the slab.The fastener clips were simulated with 4 massless spring elements pressed against the rail foot.The effect of the corrugation modeling with and without the consideration of the fastener clip on the unstable vibration of the railway vehicle system was studied.The effect of the stiffness,the preload force and the spacing between the clamping dots of the fastener clip on the rail corrugation was investigated.The corrugation modeling with and without considering the fastener clip had an impact on the stability of the wheel-rail system.There were differences in the frequency and the effective damping ratio of the dominant unstable vibration of the wheel-rail system predicted by two corrugation models.The corrugation pitch predicted by the corrugation model with considering the fastener clip was shorter than the corrugation pitch predicted by the model without considering the fastener clip.The corrugation model without considering the fastener clip might overestimate the occurrence rate and the development speed of the rail corrugation.The clip stiffness had an obvious impact on the rail corrugation.In the range of 1.5-17.5 kN/mm,as the clip stiffness increased,the effective damping ratio of the dominant unstable vibration firstly decreased and then increased.The clip stiffness increased to above 15 kN/mm and the effective damping ratio was greater than-0.001.The clip stiffness was lower than 15 kN/mm,the dominant unstable vibration frequency was 512 Hz,the clip stiffness was above 15 kN/mm and the dominant unstable vibration frequency was 313 Hz.Increasing the clip stiffness to more than 15 kN/mm can suppress rail corrugation.The clips preload and the clamping point spacing had little impact on the rail corrugation.关键词
轮轨系统/扣件系统/钢轨波磨/扣件弹条/不稳定振动Key words
wheel-rail system/fastener system/rail corrugation/fastener clips/unstable vibration分类
机械制造引用本文复制引用
王文静,吴波文,潘家保,崔晓璐,闫伟,王力红,王雪飘,张翔..扣件弹条结构和安装参数对地铁短波波磨的影响[J].表面技术,2025,54(5):143-153,11.基金项目
国家自然科学基金(52405243,52375227) （52405243,52375227）
轨道交通基础设施性能监测与保障国家重点实验室开放课题(HJGZ2023109) （HJGZ2023109）
芜湖市重点研发与成果转化项目(2023yf055) National Natural Science Foundation of China(52405243,52375227) （2023yf055）
State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure Open Topic(HJGZ2023109) （HJGZ2023109）
Key Research and Development and Achievement Transformation Project of Wuhu(2023yf055) （2023yf055）
