Transient Process of High Voltage Transmission Line Break and Shock on Railway Intersection
Research purposes:The power lines crossing the railway will break and fall under the action of wind load and ice cover,which will threaten the safety of railway operation.Aiming at this problem,the paper established a flexible wire structure breaking model,obtained the impact transient process of the power line breaking route across the railway,and obtained the law of the influence of the hook point height and cross angle on the impact force and impact stress of the line breaking.Research conclusions:(1)The impact force of breaking wire increases with the increase of the hanging point.For 35 kV power wire,when the height of the hanging point is 120 m,the impact force amplitude is close to 20 kN.(2)With the increase of the intersection between the power line and the railway line,the collision force is reduced by nearly 50％when the intersection angle is increased from 15° to 90°.(3)Combined with the research method of the paper,the impact force between the 110 kV power line break and the protection structure of the Beijing-Zhangjiakou Railway is 13 kN,and the impact force of the 35 kV power line break and fall is 8.4 kN,and the beam layout of the protection structure is designed based on the data.At the same time,the above results can provide data support for the strength design of power line protection shed hole.
万方数据
维普
