scholarly journals MANAGEMENT ON SHORTWAVE LONGITUDINAL TRACK IRREGULARITIES FOR SUPPRESSING WHEEL LOAD VARIATION IN HIGH-SPEED RAILWAY

2015 ◽  
Vol 71 (2) ◽  
pp. 83-94
Author(s):  
Toshio OTAKE ◽  
Masahiro MIWA ◽  
Toshiyuki AOKI ◽  
Koudai SENDA ◽  
Minoru IGARASHI
Keyword(s):  
High Speed ◽  
Wheel Load ◽  
High Speed Railway ◽  
Load Variation ◽  
Track Irregularities

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.

Influence of Conversion Deviation on Dynamic Performance of High-Speed Railway Turnout

2011 ◽  
Vol 474-476 ◽  
pp. 1599-1604 ◽  
Author(s):  
Rong Chen ◽  
Wang Ping ◽  
Xian Kui Wei
Keyword(s):  
High Speed ◽  
Detection System ◽  
Structural Characteristics ◽  
Dynamic Responses ◽  
Normal Operation ◽  
Foreign Matter ◽  
Wheel Load ◽  
High Speed Railway ◽  
Lateral Displacements ◽  
Railway Turnout

Railway turnout, an integrated mechatronics equipment of track technology, is one of key equipments that control the running speed of high-speed railway. During the conversion of turnout, the friction, inclusion of foreign matter and deficient displacement of conversion caused by its own structural characteristics may lead to severe wheel/rail impact. In order to study the influence of conversion deviation on safety and comfort of a train during passing the turnout, train/turnout dynamic model was applied. Taking No.18 turnout on a Passenger Dedicated Line (PDL) with 350km/h as a case study, when the train passed it, the influences of its deficient displacement and inclusion of foreign matter on the following dynamic responses were studied, i.e. wheel load distribution, wheel flange force, dynamic stress of rail, wheel unloading rate, derailment coefficient, as well as the lateral displacements of switch rail and nose rail, etc. Result shows that: (1) the deficient displacement and the inclusion of foreign matter will severely influence the normal operation of the turnout, so the safety and comfort during the train passing through turnout may be affected; (2) During the conversion of turnout, its deficient displacement should be controlled properly, and the foreign matter should be removed during routine maintenance, moreover, a reliable detection system should be set.

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
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