Study on Preventing and Controlling Strong Wind Disaster on High-Speed Railway

Based on 3-d, uncompressible onflow model with steady N-S equation and the k-epsilon double equation, aerodymic characteristics of EMU and windbreaks on bridge under cross wind were studied numerically, the results show: (1) compared to no windbreak, EMU overturning moment was decreased 50% by setting general windbreak , 75% by setting ventilated windbreak; ventilated windbreak’s protective effect on train and pantograph-catenary system is better especially when H≥2.5m ; (2) aerodynamic load on ventilated windbreak is far lower than general windbreak; (3)the higher cross-wind velocity is, the more aerodynamic load decreased when setting ventilated windbreak. Besides, ventilated windbreak’s leak form could significantly reduce bridge’s self gravity and wind load, improve wind break ability and EMU operation safety.

Download Full-text

Optimization of Bridge Windbreak on High-Speed Railway through Strong Wind Area

Advanced Materials Research ◽

10.4028/scientific5/amr.452-453.1518 ◽

2012 ◽

Vol 452-453 ◽

pp. 1518-1521

Author(s):

Ling Ling Zhou ◽

Xi Feng Liang ◽

Ming Zhi Yang ◽

Sha Huang

Keyword(s):

High Speed ◽

Strong Wind ◽

High Speed Railway

Download Full-text

Experimental investigation of the protective effect of wind barriers on high-speed railway bridge in inland strong wind area

Advances in Structural Engineering ◽

10.1177/1369433219862939 ◽

2019 ◽

Vol 22 (15) ◽

pp. 3306-3318

Author(s):

Wanmin Ren ◽

Qingsong Duan ◽

Cunming Ma ◽

Haili Liao ◽

Qiusheng Li

Keyword(s):

Experimental Investigation ◽

Protective Effect ◽

High Speed ◽

Aerodynamic Characteristics ◽

Strong Wind ◽

Railway Bridge ◽

Box Girder ◽

High Speed Railway ◽

Wind Barrier ◽

Better Than

This study aims to investigate the wind protective effect of wind barriers on the Lanzhou–Xinjiang high-speed railway using wind tunnel tests. Wind barriers with different heights and porosities were analyzed. Two girders, that is, a box-girder and a trough-girder, each with 1:30 and 1:8 scales were experimentally investigated. The results suggest that the protective effect of the wind barrier with a height of 4 m and porosity of 20% is better than the others. The influence of wind barriers on the aerodynamic characteristics of train vehicles and girders must be analyzed simultaneously. The aerostatic force coefficients of trains are approximately the same at different scales, and the Reynolds number effect could be neglected.

Download Full-text

Wind-Tunnel Studies on Sand Sedimentation Around Wind-Break Walls of Lanxin High-Speed Railway II and Its Prevention

Applied Sciences ◽

10.3390/app11135989 ◽

2021 ◽

Vol 11 (13) ◽

pp. 5989

Author(s):

Hongchao Dun ◽

Guowei Xin ◽

Ning Huang ◽

Guangtian Shi ◽

Jie Zhang

Keyword(s):

Wind Tunnel ◽

Deposition Rate ◽

High Speed ◽

Particle Deposition ◽

Sand Particle ◽

Gobi Desert ◽

Strong Wind ◽

Number Density ◽

High Speed Railway ◽

Sand Particles

Wind-break walls along Lanxin High-Speed Railway II were studied and approved as effective measures to reduce strong wind damage to the high-speed trains. The results show that sand sedimentation on the leeward sides of wind-break walls along the railway within Gobi Desert could significantly threaten the operation safety of running trains. Different from the current sand sedimentation prevention measures without adequate consideration of the deposition process of airborne sand particles, this study revealed the mechanism of sand sedimentation on the leeward sides of three wind-break walls within different terrains. A series of wind-tunnel experiments were carried out to measure the horizontal velocity, number density, transport flux, and deposition rate of sand particles, and it was found that the horizontal speed of sand particles was first increased and then decreased on the railway track, and the peak speed over the concave subgrade was much smaller than those over convex and flat subgrades. The number density and horizontal sand flux were largest over the concave subgrade, and were the smallest over the convex subgrade. The sand particle deposition rate and distribution were also the largest within the concave subgrade, and some measures were also proposed to prevent sand sedimentation on the leeward sides of wind-break walls.

Download Full-text