Analysis of Influencing Mechanism of Subgrade Frost Heave on Vehicle-Track Dynamic System

被引：35

作者：

Gao, Liang ^{[1
]}

Zhao, Wenqiang ^{[1
]}

Hou, Bowen ^{[1
]}

Zhong, Yanglong ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

来源：

APPLIED SCIENCES-BASEL | 2020年 / 10卷 / 22期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

high-speed railway; vehicle-track dynamics; subgrade frost heave; slab track; leverage effect; HIGH-SPEED RAILWAY; BALLASTED TRACK; DEFORMATION; EMBANKMENT;

D O I：

10.3390/app10228097

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Uneven subgrade frost heave has been a severe problem for the operation of high-speed railways in cold regions. In order to reveal the influencing mechanism of frost heave on the vehicle-track system, a novel FEM (finite element method) model based on an explicit algorithm was proposed. In the novel model, the existence of the leverage effect in slab track, which was caused by frost heave, was realistically reproduced at first, and then the vehicle model started running for evaluating the influence of the frost heave on the whole dynamic system. Results show that the leverage effect plays a key role in analyzing the influence of frost heave on the vehicle-track system, besides for track irregularity and contact loss. Specifically, the leverage effect decreases the stability of the slab track and causes an increase in dynamic irregularity. The roles of the track irregularity and the contact loss in the influencing mechanism were also revealed. With the ratio of wavelength to amplitude increasing, the track irregularity is gradually dominant in the influence mechanism of frost heave on the vehicle-track system. The research could provide a reference for the management and maintenance of the slab track in cold regions.

引用

页码：1 / 20

页数：20

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