中国铁道科学2017，Vol.38Issue(4)：84-91,8.DOI:10.3969/j.issn.1001-4632.2017.04.12
柔性轨道下高速列车车轮谐波磨耗对轮轨滚动接触蠕滑特性的影响
Influence of Wheel Harmonic Wear of High Speed Train on Creep Characteristics of Wheel-Rail Rolling Contact under Flexible Track
摘要
Abstract
In order to analyze the influence mechanism of vibration on the properties of wheel-rail contact creep problem under flexible track,especially caused by harmonic excitation and the vibration of the flexible rail and wheelset,based on CRTS double-block ballastless track and CRH2 high speed train,the dynamic numerical model of high speed train under flexible track was established by using ANSYS and UM software.6 typical harmonic wear (the order number is 1,6 and 11 respectively;the corresponding wave depth is 0.1 and 0.3 mm respectively) wheels were selected to analyze the vibration characteristics of the wheel-rail rolling contact,wheel/rail creep force and creepage.Results show that the increase of wheel harmonic wear order and wave depth results in the significant increase of rail vertical acceleration,wheelset vertical acceleration,wheel/rail vertical force,wheel/rail creep force and creepage.Compared with order number,the influence of wave depth on creep characteristics of rolling contact is greater.When the harmonic wear order of wheel is 11 and the wave depth is 0.3 mm,the maximum wheel/rail vertical force,the maximum rail vertical acceleration,the maximum and average wheelset vertical acceleration,the average longitudinal creepage,the absolute mean of longitudinal creep force,the maximum lateral creep force and the maximum longitudinal creep force are respectively about 7.27,49.6,20.35,15.18,7.8,9.064,6.7 and 8.57 times of those of wheel without harmonic wear.After considering the flexible track,the detachment time of wheel-rail contact increases obviously,and the wheel/rail creepage and creep force also increase significantly.关键词
柔性轨道/高速列车/车轮谐波磨耗/滚动接触/轮轨关系/蠕滑率/蠕滑力Key words
Flexible track/High speed railway/Wheel harmonic wear/Rolling contact/Wheel-rail interaction/Creepage/Creep force分类
交通工程引用本文复制引用
周新建,肖乾,程树,杨逸航..柔性轨道下高速列车车轮谐波磨耗对轮轨滚动接触蠕滑特性的影响[J].中国铁道科学,2017,38(4):84-91,8.基金项目
国家自然科学基金资助项目(51565013) （51565013）
西南交通大学牵引动力国家重点实验室开放项目(TPL1407) （TPL1407）
