基于POLACH方法的轮轨蠕滑曲线研究

doi:10.3901/JME.2018.04.124

机械工程学报 ›› 2018, Vol. 54 ›› Issue (4): 124-131.doi: 10.3901/JME.2018.04.124

基于POLACH方法的轮轨蠕滑曲线研究

安博洋^1,2, 王平^1,2, 徐义新³, 徐井芒^1,2, 陈嵘^1,2

1. 高速铁路线路工程教育部重点实验室成都 610031;
2. 西南交通大学土木工程学院成都 610031;
3. 中车长春轨道客车股份有限公司长春 130000

收稿日期:2017-04-13 修回日期:2017-12-26 出版日期:2018-02-20 发布日期:2018-02-20
通讯作者: 陈嵘(通信作者),男,1981年出生,博士,教授,博士研究生导师。主要研究方向为高速、重载铁路轨道结构与轨道动力学。E-mail:chenrong@home.swjtu.edu.cn
作者简介:安博洋,男,1988年出生,博士研究生。主要研究方向为滚动接触力学与轮-轨界面伤损机理。E-mail:706568826@qq.com
基金资助:
国家自然科学基金（51425804，51778542，51608459）、国家重点研发计划（2016YFC0802203-4）和西南交通大学博士研究生创新基金（D-CX201702）资助项目

Study on Wheel/rail Creep Curve Based on POLACH's Method

AN Boyang^1,2, WANG Ping^1,2, XU Yixin³, XU Jingmang^1,2, CHEN Rong^1,2

1. Key Laboratory of High-speed Railway Engineering of Ministry of Education, Chengdu 610031;
2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031;
3. CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130000

Received:2017-04-13 Revised:2017-12-26 Online:2018-02-20 Published:2018-02-20

摘要/Abstract

摘要： 蠕滑曲线对于描绘轮轨相互作用关系是十分重要的，影响车辆牵引/制动控制、运行平稳性和安全性。选用POLACH基于实测数据提出的接触方法，详细调查影响轮轨蠕滑曲线变化的因素，参变量涵括衰减因子、函数型摩擦因数、轮轨接触几何、轴重和车辆运行速度。研究发现衰减因子可表征轮轨接触界面粗糙度，用以描述蠕滑曲线初始斜率的衰减；函数型摩擦因数则可描述蠕滑曲线在大蠕滑区下降的趋势；轨距角与轨顶处的蠕滑曲线存在不可忽略的差异，这便于解释钢轨小半径曲线侧磨现象；在潮湿工况下，黏着系数随速度的提升而降低，但计算所得黏着系数高于文献报道的实测结果。为此，引入一种考虑运行速度和微滑速度的函数型摩擦因数，取得了与实测数据相吻合的结果。

关键词: 函数型摩擦因数, 轮轨关系, 黏着系数, 蠕滑曲线

Abstract: The creep curve is very important for describing wheel-rail interaction and maintaining good vehicle traction/brake control performance. A detailed investigation is performed on the change of adhesion coefficient as a result of parametric variables such as attenuation factors, slip dependent friction coefficient, wheel/rail contact geometry, wheel load and vehicle running speed based on Polach's method. The study finds that attenuation factor can represent roughness of wheel/rail interface and describe decay of initial slope of creep curve. Slip dependent friction can represent the decrease of creep curve in large creep zone. The creep curve at rail gauge corner is obviously different from that at rail top, easily explaining the phenomenon of rail side wear at small radius curves. Under wet condition, adhesion coefficient decrease with the increacement of speed. But the calculating adhesion is higher than that measured in field test according to literature. A slip and velocity dependent friction is introduced to obtain reasonable results.

Key words: adhesion coefficient, creep curve, slip dependent friction, wheel/rail relationship

中图分类号:

U211

安博洋, 王平, 徐义新, 徐井芒, 陈嵘. 基于POLACH方法的轮轨蠕滑曲线研究[J]. 机械工程学报, 2018, 54(4): 124-131.

AN Boyang, WANG Ping, XU Yixin, XU Jingmang, CHEN Rong. Study on Wheel/rail Creep Curve Based on POLACH's Method[J]. Journal of Mechanical Engineering, 2018, 54(4): 124-131.

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基于POLACH方法的轮轨蠕滑曲线研究

Study on Wheel/rail Creep Curve Based on POLACH's Method

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