Influences of Infrastructure Property on the Train-Track Interaction Due to Track Irregularities

2020 ◽  
pp. 269-277
Author(s):  
Chao Chang ◽  
Liang Ling ◽  
Wanming Zhai ◽  
Kaiyun Wang
Keyword(s):  
Train Track ◽  
Track Irregularities

Influences of Wind Barriers on the Train Running Safety on a Highway-Railway One-Story Bridge

2021 ◽  
pp. 2140009
Author(s):  
Ye Liu ◽  
Yan Han ◽  
Peng Hu ◽  
C. S. Cai ◽  
Xuhui He
Keyword(s):  
Dynamic Responses ◽  
Response Analysis ◽  
Train Track ◽  
Wheel Load ◽  
Wind Barrier ◽  
The Mean ◽  
Wind Pressures ◽  
Track Bridge ◽  
Fluctuating Wind ◽  
Bridge System

In this study, the influences of wind barriers on the aerodynamic characteristics of trains (e.g. a CRH2 train) on a highway-railway one-story bridge were investigated by using wind pressure measurement tests, and a reduction factor of overturning moment coefficients was analyzed for trains under wind barriers. Subsequently, based on a joint simulation employing SIMPACK and ANSYS, a wind–train–track–bridge system coupled vibration model was established, and the safety and comfort indexes of trains on the bridge were studied under different wind barrier parameters. The results show that the mean wind pressures and fluctuating wind pressures on the trains’ surface decrease generally if wind barriers are used. As a result, the dynamic responses of the trains also decrease in the whole process of crossing the bridge. Of particular note, the rate of the wheel load reductions and lateral wheel-axle forces can change from unsafe states to relative safe states due to the wind barriers. The influence of the porosity of the wind barriers on the mean wind pressures and fluctuating wind pressures on the windward sides and near the top corner surfaces of the trains are significantly greater than the influence from the height of the wind barriers. Within a certain range, decreasing the wind barrier porosities and increasing the wind barrier heights will significantly reduce the safety and comfort index values of trains on the bridge. It is found that when the porosity of the wind barrier is 40%, the optimal height of the wind barrier is determined as approximately 3.5[Formula: see text]m. At this height, the trains on the bridges are safer and run more smoothly and comfortably. Besides, through the dynamic response analysis of the wind–train–track–bridge system, it is found that the installation of wind barriers in cases with high wind speeds (30[Formula: see text]m/s) may have an adverse effect on the vertical vibration of the train–track–bridge system.

Effects of Track Irregularities on Dynamic Responses of a Moving Maglev Train

2005 ◽  
Author(s):  
Aravind M. Hanasoge ◽  
Steven A. Hans ◽  
Santosh Desetty ◽  
Sebastian Bawab ◽  
Gene Hou ◽  
...  
Keyword(s):  
Dynamic Responses ◽  
Maglev Train ◽  
Track Irregularities

scholarly journals Advanced Stochastic Modeling of Railway Track Irregularities

2013 ◽  
Vol 5 ◽  
pp. 401637 ◽  
Author(s):  
Mengyi Zhu ◽  
Xiaohui Cheng ◽  
Lixin Miao ◽  
Xinya Sun ◽  
Shuai Wang
Keyword(s):  
Stochastic Modeling ◽  
Railway Track ◽  
Track Irregularities

scholarly journals Automatic Train Track Monitoring and Collision Avoidance System

IARJSET ◽  
2019 ◽  
Vol 6 (5) ◽  
pp. 147-151
Author(s):  
Madhurendra Kumar ◽  
Tanusree Dutta ◽  
Rabindranath Ghosh
Keyword(s):  
Collision Avoidance ◽  
Train Track ◽  
Collision Avoidance System ◽  
Track Monitoring

scholarly journals New Method for Realizing Track Irregularities on Railway Vehicle Test Stand

2006 ◽  
Vol 72 (720) ◽  
pp. 2439-2446
Author(s):  
Masakazu ADACHI ◽  
Mitsugi SUZUKI ◽  
Tadanobu IIDA
Keyword(s):  
Test Stand ◽  
New Method ◽  
Railway Vehicle ◽  
Vehicle Test ◽  
Track Irregularities

High-speed train–track–bridge dynamic interactions – Part I: theoretical model and numerical simulation

2013 ◽  
Vol 1 (1-2) ◽  
pp. 3-24 ◽  
Author(s):  
Wanming Zhai ◽  
He Xia ◽  
Chengbiao Cai ◽  
Mangmang Gao ◽  
Xiaozhen Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Theoretical Model ◽  
High Speed ◽  
High Speed Train ◽  
Train Track ◽  
Dynamic Interactions ◽  
Track Bridge
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