摘要
制动盘的摩擦磨损是高速列车盘式制动工作失效的重要原因,且摩擦块的排列方式是影响制动盘最大磨损深度的重要因素。为研究摩擦块排列方式对制动盘最大磨损深度的影响,考虑摩擦温度、接触应力和相对滑移速度在制动过程发生变化,基于Archard磨损模型进行修正,利用ANSYS有限元仿真软件,建立制动盘-闸片三维瞬态模型,采用列车在通过42号道岔紧急制动时的工况,仿真计算不同摩擦块排列方式下制动盘摩擦面的最大磨损深度。分析最大接触应力,提出“应力磨损因子”参数,用来表征应力对最大磨损深度的影响。提取径向节点磨损深度,分析摩擦表面的磨损形貌,给出摩擦块不同排列方式对制动盘磨损深度的影响规律。研究成果为改善制动盘磨损提供理论依据和新的思路,为今后铁路制动系统闸片结构的设计提供借鉴。
Frictional wear of brake discs is an important cause of disc brake failure in high-speed trains,and the arrangement of friction blocks is an important factor affecting the maximum wear depth of brake discs.In order to study the influence of the arrangement of friction blocks on the maximum wear depth of the brake disc,the change of friction temperature,contact stress and relative slip speed in the braking process were considered,based on the Archard wear model for modification,using ANSYS finite element simulation software,the three-dimensional transient model of the brake disc-brake pads was established,the train through the No.42 turnouts in the emergency braking situation was adopted,the maximum wear of the brake disc friction surface under different friction block arrangements was simulated calculation.The maximum wear depth of the friction surface of the brake disc was calculated under different friction block arrangements.The maximum contact stress was analyzed,and the parameter“stress wear factor”was proposed to characterize the effect of stress on the maximum wear depth.The radial nodal wear depth was extracted,the wear morphology of the friction surface was analyzed,and the influence of different arrangements of friction blocks on the wear depth of the brake disc was given.The research results provide the theoretical basis and new ideas for improving the wear of brake discs and provide a reference for the design of the brake pad structure of railway braking systems in the future.
作者
周素霞
王君艳
巴馨悦
李光
曲直
ZHOU Su-xia;WANG Jun-yan;BA Xin-yue;LI Guang;QU Zhi(School of Mechanical-electronic and Vehicle Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Key Laboratory of Service Performance of Vehicle,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《科学技术与工程》
北大核心
2024年第12期5162-5169,共8页
Science Technology and Engineering
基金
北京市自然科学基金(L211007)。
