Influence of Wheel Harmonic Wear of High Speed Train on Creep Characteristics of Wheel-Rail Rolling Contact under Flexible Track

被引：1
作者：
Zhou X. [1 ]
Xiao Q. [1 ,2 ]
Cheng S. [1 ]
Yang Y. [1 ]
机构：
[1] Ministry of Education and Province Department Key Laboratory of Vehicles and Equipment, East China Jiaotong University, Nanchang, 330013, Jiangxi
[2] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, Sichuan
来源：
Xiao, Qian (jxralph@foxmail.com) | 1600年 / Chinese Academy of Railway Sciences卷 / 38期
关键词：
Creep force; Creepage; Flexible track; High speed railway; Rolling contact; Wheel harmonic wear; Wheel-rail interaction;
D O I：
10.3969/j.issn.1001-4632.2017.04.12
中图分类号：
学科分类号：
摘要：
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. © 2017, Editorial Department of China Railway Science. All right reserved.
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页码：84 / 91
页数：7
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