A Study on the Correlation Between Measured Track Irregularities and Vehicle Responses in High-Speed Lines

2020 ◽  
pp. 154-163
Author(s):  
Xiubo Liu ◽  
Shuai Ma ◽  
Zilong Wei ◽  
Bo Zhang
Keyword(s):  
High Speed ◽  
Track Irregularities

Experimental studies of load characteristics of bogie frames for 350 km/h EMUs

2011 ◽  
Vol 226 (2) ◽  
pp. 216-227 ◽  
Author(s):  
Z Ren ◽  
S Sun ◽  
Q Li ◽  
Z Liu
Keyword(s):  
High Speed ◽  
Experimental Studies ◽  
Lateral Force ◽  
Load Spectrum ◽  
Dynamic Stresses ◽  
Dynamic Coefficients ◽  
Sample Data ◽  
Load Characteristics ◽  
Amplitude Level ◽  
Track Irregularities

In this paper,methods to measure the axle spring load, trailing arm seat lateral force and dynamic stresses of powered and non-powered bogies of a 350 km/h electrical-multi-unit (EMU) are presented. The dynamic amplitude and Hilbert transform of the sample data are used to investigate the characteristics of the forces and the stresses for the EMU running on typical sections including high-speed division, turnout zone, curves, and depot entrance. The load spectrum is then introduced to survey the amplitude level and the number of occurrence of the loads and stresses. Dynamic coefficients of the loads are compared with the recommended values in the Code UIC615-4. The effects of track irregularities and vibrations of gear boxes and motors on the loads and stresses are investigated and the measured loads are classified into six types according to effects of forces on the bogie's movement. The characteristics of the measured loads are useful to establish load conditions for laboratory tests of bogie’s fatigue assessment.

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.

scholarly journals Random Response Analysis of Axle-Box Bearing of a High-Speed Train Excited by Crosswinds and Track Irregularities

2019 ◽  
Vol 68 (11) ◽  
pp. 10607-10617 ◽  
Author(s):  
Zhiwei Wang ◽  
Yang Song ◽  
Zhonghui Yin ◽  
Ruichen Wang ◽  
Weihua Zhang
Keyword(s):  
High Speed ◽  
Response Analysis ◽  
Random Response ◽  
High Speed Train ◽  
Track Irregularities

scholarly journals Numerical analysis of beam rail bridges with random track irregularities

2018 ◽  
Vol 196 ◽  
pp. 01050
Author(s):  
Monika Podwórna
Keyword(s):  
Numerical Analysis ◽  
High Speed ◽  
Concrete Bridges ◽  
Track Structure ◽  
Simply Supported ◽  
Ballasted Track ◽  
High Speed Trains ◽  
Composite Bridge ◽  
Random Track Irregularities ◽  
Track Irregularities

The study focuses on dynamic analysis of composite bridge / track structure / train systems (BTT systems) with random vertical track irregularities taken into consideration. The paper presents the results of numerical analysis of advanced virtual models of series-of-types of single-span simply-supported railway steel-concrete bridges (SCB) with symmetric platforms, located on lines with the ballasted track structure adapted to traffic of high-speed trains.

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