台风风场下的1000kV输电塔风洞试验与风振响应分析
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李涛(1987-),男,硕士,高级工程师,主要从事输电通道环境监测技术研究;E-mail:litao3@sgepri.sgcc.com.cn

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国家电网有限公司科技项目(5211WZ16002S)


Wind tunnel test and wind-induced response analysis of 1 000 kV transmission line under typhoon wind fields
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    摘要:

    以东南沿海地区的特高压角钢塔为对象,针对台风风场在极值风速与风荷载分布相对常规风的差异性,进行风洞试验与风振响应分析。首先,基于台风实测数据,对风剖面指数进行拟合,并对 A 类地貌下的湍流强度设定进行修正以更符合实际台风风场;然后,针对1000kV 输电塔采用高频天平测力风洞试验,获得各项平均风力系数随风向角的变化以及全塔、塔头、塔身体型系数,并基于谐波叠加法模拟输电线路上各点脉动风速,获得不同工况下的等效静风荷载及风振系数;最后,进行特高压杆塔在台风风场下的结构阻尼、结构频率、塔顶加速度、最大基底荷载等参数的敏感性分析。结果表明:加速度响应对阻尼较为敏感,位移响应和加速度响应对自振频率较为敏感。

    Abstract:

    Aiming at the differences in maximum wind speed and wind pressure distribution between typhoon wind field and conventional wind, this paper conducts wind tunnel test and wind-induced response analysis of 1 000 kV transmission tower in southeastern coastal areas. Based on the real data of typhoon, the wind profile index is fitted and the turbulence intensity is modified in landform category A for more fulfilling the real wind field. Through the high-frequency force balance test on 1 000 kV transmission tower, the average wind coefficients vary with different wind direction and the shape coefficients of whole tower, tower head and tower body is acquired. By using the harmonic wave superposition method to simulate turbulent wind velocity of all nodes in tower, equivalent static wind loads and wind vibration coefficients in varies operation conditions are obtained. Then, the sensitivity analysis of the structure damping, structure frequency, tower acceleration and maximum base load of the 1 000 kV tower in typhoon wind field is performed. Results indicate that acceleration response is sensitive to damping. Displacement response and acceleration response are sensitive to natural frequency.

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李涛,王谦,吴登国,苏杰,程远,楼文娟.台风风场下的1000kV输电塔风洞试验与风振响应分析[J].电力科学与技术学报,2021,(2):76-82. Li Tao, Wang Qian, Wu Dengguo, Su Jie, Cheng Yuan, Lou Wenjuan. Wind tunnel test and wind-induced response analysis of 1 000 kV transmission line under typhoon wind fields[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2021,(2):76-82.

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  • 在线发布日期: 2021-05-08