scholarly journals Waveband Analysis of Track Irregularities in High-Speed Railway from On-Board Acceleration Measurement

2012 ◽  
Vol 6 (6) ◽  
pp. 750-759 ◽  
Author(s):  
Jun Seok LEE ◽  
Sunghoon CHOI ◽  
Sang-Soo KIM ◽  
Young Guk KIM ◽  
Seog Won KIM ◽  
...  
Keyword(s):  
High Speed ◽  
Acceleration Measurement ◽  
High Speed Railway ◽  
Track Irregularities

scholarly journals Dynamic Analysis of a High-Speed Railway Train With the Defective Axle Bearing

2020 ◽  
Vol 25 (4) ◽  
pp. 525-531
Author(s):  
Jing Liu ◽  
Shangkun Du
Keyword(s):  
Dynamic Analysis ◽  
High Speed ◽  
Time Dependent ◽  
Force Model ◽  
High Speed Railway ◽  
The Road ◽  
Reasonable Approach ◽  
Simulation Results ◽  
Train System ◽  
Track Irregularities

Axle bearings (AXBs) are critical parts for high-speed railway trains (HSTs). Local faults in the AXBs have great influences on the operational dynamics of HSTs. Although some previous works formulated the local faults in single AXB, the vibrations of the whole train system with the defective AXB cannot be described. To overcome this problem, this study conducts a dynamic model for a HST considering a local fault in one AXB. The previous single AXB model cannot formulate the studied case. The impacts caused by the fault in the AXB is defined as a time-dependent force model considering a half-sine type. The road spectrum excitations from the roadbed and rail are formulated by a track irregularities model. The effects of the train speeds and fault sizes on the HST dynamics are introduced. The simulation results from the proposed and previous works are contrasted to show the model validation. The results show that the faults in the AXB will greatly affect the HST dynamics. It depicts that this study can afford a more reasonable approach for understanding the dynamics of HSTs considering the defective AXBs compared to the reported single AXB model.

Analysis of Vehicle Dynamic Behavior under Ballasted Track Irregularities in High-Speed Railway

2015 ◽  
Vol 46 (10) ◽  
pp. 10-17 ◽  
Author(s):  
Xiaopei Cai ◽  
Lining Zhao ◽  
Albert Leong Lee Lau ◽  
Shiyu Tan ◽  
Rixin Cui
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Vehicle Dynamic ◽  
High Speed Railway ◽  
Ballasted Track ◽  
Track Irregularities

scholarly journals PSD of ballastless track irregularities of high-speed railway

2014 ◽  
Vol 44 (7) ◽  
pp. 687-696 ◽  
Author(s):  
Fei YANG ◽  
WanMing ZHAI ◽  
JianMin GAO ◽  
HongYan LI ◽  
Xiong KANG ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Railway ◽  
Ballastless Track ◽  
Track Irregularities

Research of the Key Control Parameters Standard for Shield Tunnel Under-Crossing High Speed Railway

2014 ◽  
Vol 580-583 ◽  
pp. 1273-1278
Author(s):  
Zhe Liu ◽  
Ping He
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Railway Track ◽  
Shield Tunnel ◽  
Element Analysis ◽  
High Speed Railway ◽  
Design Specifications ◽  
Deformation Law ◽  
Track Deformation ◽  
Track Irregularities

This paper takes a new shield tunnel as the research object, which intends to cross a section of a high speed railway. Based on design specifications and the existing monitoring data to analyze the change rule of track irregularities, this article proposes the control of wavelength and relevant amplitude in the above case, following the design specifications and long-wave irregularity management demands of high-speed highway. And the controlling values of wavelength and amplitude required are presented with the outcome of the range of the settlement trough, drawn out of the under-crossing process. And it also uses large-scale non-linear finite element analysis software to simulate the high speed railway track deformation in actual constructions, to test whether the deformation meet the requirements of the control standards and deformation law. The results can provide reference for the construction measure when shield tunnel under crosses the high speed railway in the future.

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