耦合高速列车风下的输电线路跨越封网风偏响应研究Study of Wind Deflection Response of Sealing Network Caused by Coupled High-speed Train Slipstream
黄士君,何畅,黄涛,王城禹,江力强,曹枚根
HUANG Shijun,HE Chang,HUANG Tao,WANG Chengyu,JIANG Liqiang,CAO Meigen
摘要(Abstract):
为探究高速列车风及自然风耦合作用下的封网风偏响应,建立了耦合列车风分析模型,研究了高速列车风与自然风耦合作用下的风速剖面;然后,建立了封网结构的动力响应数值模型,分析了在耦合高速列车风荷载作用下的风偏响应。结果表明,高速列车的存在将放大自然风风速,且耦合高速列车风荷载存在明显的"头波-尾波"冲击效应;在耦合高速列车风作用下,封网具有较大的竖直方向风偏响应,增大封网承力索预张力能有效减小封网的风偏响应。在常见封网跨度范围内,封网承力索预张力不宜小于80 kN。
To look into the wind deflection responses of the sealing networks under the coupled high-speed train slipstream and wind loads, an analysis model for coupled high-speed train slipstream was established,and the wind-speed profile of the coupled slipstream was studied. Moreover, a dynamic response numerical model of the sealing networks was established, and the wind deflection response of the sealing networks under the coupled loads was analyzed. The results indicate that the high-speed train amplifies wind speed, and there is evident 'front-tail' impact effect of coupled wind loads; under the coupled high-speed train slipstream, the vertical wind deflection response of the sealing networks are significant, and it can be diminished by increasing the pretensions in the carrier cables of the sealing networks effectively. For the common span length of the sealing networks, the pretensions in the carrier cables should not be less than 80 kN.
关键词(KeyWords):
封网;高速列车;耦合风荷载;风偏响应;预张力
sealing network;high-speed train;coupled wind load;wind deflection response;pretension
基金项目(Foundation): 国网江苏省电力有限公司2020年科技项目(J2020035)
作者(Author):
黄士君,何畅,黄涛,王城禹,江力强,曹枚根
HUANG Shijun,HE Chang,HUANG Tao,WANG Chengyu,JIANG Liqiang,CAO Meigen
DOI: 10.19585/j.zjdl.202111005
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- 封网
- 高速列车
- 耦合风荷载
- 风偏响应
- 预张力
sealing network - high-speed train
- coupled wind load
- wind deflection response
- pretension