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台风风场与B类风场作用下输电塔风效应对比研究
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1.国网福建省电力有限公司;2.中国电建集团福建省电力勘测设计院有限公司;3.国网福建省电力有限公司经济技术研究院;4.中国能源建设集团湖南省电力设计院有限公司;5.长沙理工大学土木工程学院

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Comparison study of wind effects on transmission tower under typhoon wind field and terrain B wind field
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Affiliation:

1.State grid Fujian electric power company;2.Powerchina Fujian electric power survey &3.design institute Co. Ltd;4.Economic research institute, State grid Fujian electric power company;5.China Energy Engineering Group HuNan Electric Power Design Institue CO.,LTD;6.College of Civil Engineering, Changsha University of Science &7.Technology

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    摘要:

    在边界层风洞中开展了台风风场与B类风场条件下某角钢输电塔气弹模型试验,采用谐波合成法模拟了不同高度的风速时程在时域内进行了输电塔结构风致响应计算,对比研究了两类风场条件下的风致响应与风振系数。研究结果表明:气动阻尼较大,不可忽略;输电塔风致加速度响应随着来流风速的增大而明显增大,台风风场条件下加速度响应更为剧烈,比B类风场条件大约20%~30%;B类风场条件下风振系数为1.59,台风风场条件下达到1.85,总体增幅达到16%;数值模拟结果与风洞试验结果较为吻合。因此,台风多发地区的输电塔设计应考虑台风高湍流引起的动力风荷载增大效应。

    Abstract:

    Wind tunnel tests on a steel angle transmission tower with a aeroelastic model under typhoon wind field and terrain B wind field were carried out, and then the time series of wind velocity for different height of the transmission tower were simulated by WAWS method and the wind-induced responses were calculated with FEM in time domain. The comparison of wind-induced response and wind vibration factor are conducted. The results indicate that: The aerodynamic damping is larger and can't be ignored. The wind-induced acceleration responses enlarge significantly with wind velocity increase, the wind-induced acceleration response under typhoon wind field is more intensity than that under terrain B wind field, and the amplification is up to 20%~30% . The highly weighted wind vibration factor with value of 1.59 under terrain B wind field, and the value of 1.85 are found under typhoon wind field, the amplification is up to 16% in total. The results from numerical simulation are in good agreement with that from the wind tunnel test. Therefore, the design of transmission tower in typhoon-prone areas should take the fluctuating wind load magnification effect into consideration.

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  • 收稿日期: 2019-11-27
  • 最后修改日期: 2019-12-25
  • 录用日期: 2019-12-27
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