论文部分内容阅读
在输电塔电力设施的抗风设计中,必须考虑地形对风场的影响。详细回顾了典型地形对近地风场的影响,对所有发达国家和地区的现行风荷载规范进行了深入对比分析,发现各国规范的制定思路基本相同,但提出的地形对风场影响的模型各不相同,并与我国风荷载规范进行了比较,为我国电力设施抗风设计提供了参考。某特高压大跨越输电塔的风振分析实例结果表明,山地地形对风场有很大影响,进而对输电塔的风振响应也有很大影响,山地地形下输电塔的位移响应比平地增大约23.0%～59.6%。
In the wind power design of transmission towers, the influence of the terrain on the wind field must be considered. The impact of typical terrain on the wind field is reviewed in detail. The current wind load specifications of all developed countries and regions are compared and analyzed in depth. It is found that the formulation of national norms is basically the same. However, Not the same, and compared with our wind load specification, which provides a reference for wind power design of our power facilities. The results of wind-induced vibration analysis of a UHV long-span transmission tower show that the mountain topography has a great influence on the wind field and further affects the wind-induced vibration response of the transmission tower. The displacement response of the transmission tower under the mountainous terrain is increased by about 23.0% ~ 59.6%.