scholarly journals Wear Problems of High-Speed Wheel/Rail Systems: Observations, Causes, and Countermeasures in China

2020 ◽  
Vol 72 (6) ◽  
Author(s):  
Wanming Zhai ◽  
Xuesong Jin ◽  
Zenfeng Wen ◽  
Xin Zhao
Keyword(s):  
High Speed ◽  
Dynamic Measurements ◽  
Railway Network ◽  
High Speed Railway ◽  
Rail Corrugation ◽  
Railway Systems ◽  
Rail Systems ◽  
Uneven Wear ◽  
Low Wear ◽  
Numerical Approaches

Abstract Wear problems of wheel/rail systems occurring on the Chinese high-speed railway network in the last decade are summarized and explained together with the corresponding experience of treating them. Focus is placed on uneven wear because even wear is not an urgent issue due to its very low wear rate for the Chinese high-speed railway systems. Two typical problems of longitudinal uneven wear, namely, wheel polygonization and rail corrugation, are introduced in terms of their characteristics, consequences, causes and initiation mechanisms. Next, wheel hollow wear and flange/gauge side wear, as typical problems of lateral uneven wear, are similarly discussed. Validated countermeasures against all these problems are presented at the end of this paper together with further proposals under testing or consideration. This work is principally based on first-hand data collected from field observations, monitoring tests and dynamic measurements, but typical numerical approaches and results are also presented to help explain the observed phenomena.

Transport Organization Modes under a High-Speed Railway Network

ICTE 2015 ◽  
2015 ◽  
Author(s):  
Qiangfeng Zhang ◽  
Haifeng Yan ◽  
Shaoquan Ni ◽  
Wenting Zhang
Keyword(s):  
High Speed ◽  
Railway Network ◽  
High Speed Railway ◽  
Transport Organization

scholarly journals Simultaneous Optimization of Train Timetabling and Platforming Problems for High-Speed Multiline Railway Network

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Qin Zhang ◽  
Xiaoning Zhu ◽  
Li Wang ◽  
Shuai Wang
Keyword(s):  
High Speed ◽  
Optimization Problems ◽  
Programming Model ◽  
Simultaneous Optimization ◽  
Resource Assignment ◽  
Railway Network ◽  
High Speed Railway ◽  
Train Timetabling ◽  
Train Timetable ◽  
Railway Operation

The optimization problems of train timetabling and platforming are two crucial problems in high-speed railway operation; these problems are typically considered sequentially and independently. With the construction of high-speed railways, an increasing number of interactions between trains on multiple lines have led to resource assignment difficulties at hub stations. To coordinate station resources for multiline train timetables, this study fully considered the resources of track segments, station throat areas, and platforms to design a three-part space-time (TPST) framework from a mesoscopic perspective to generate a train timetable and station track assignment simultaneously. A 0-1 integer programming model is proposed, whose objective is to minimize the total weighted train running costs. The construction of a set of incompatible vertexes and links facilitates the expression of difficult constraints. Finally, example results verify the validity and practicability of our proposed method, which can generate conflict-free train timetables with a station track allocation plan for multiple railway lines at the same time.

Sign in / Sign up

Export Citation Format

Share Document