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| 基于风洞试验的输电塔风雨耦合响应特性研究 |
| Research on Wind-Rain Coupling Response Characteristics of a Transmission Tower Based on Wind Tunnel Tests |
| 投稿时间：2026-03-19 修订日期：2026-05-06 |
| DOI： |
| 中文关键词: 风雨耦合 风洞试验 位移响应 抗风设计 |
| 英文关键词: wind - rain coupling wind tunnel test displacement response wind - resistant design |
| 基金项目:重大自然灾害防控与公共安全（2023YFC3010002） |
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| 中文摘要: |
| 以往对输电塔风雨响应多采用有限元模拟,为揭示风雨耦合作用下输电塔的位移响应规律,完善抗风雨设计理论,以110kV猫头型角钢输电塔为原型,设计1:16缩尺比气弹模型,在风洞中开展风雨耦合多工况试验。从输电塔响应的统计特征、功率谱分布特征与风振系数等维度,对比探究了在不同风向角、风速及雨强条件下风振响应的演变规律。结果表明:风雨耦合作用会导致输电塔的动力特性发生变化,塔顺线路及垂直线路方向的基本频率有所改变,其在风雨耦合环境下的机械阻尼与气动阻尼均出现变化；输电塔的风振系数呈现明显增大的趋势；与仅受风力作用的情况相比,风雨耦合时塔的最不利风向角从30°风向角变为45°风向角。 |
| 英文摘要: |
| In previous studies, the wind-rain response of transmission towers has been mostly investigated through finite element simulation. To reveal the displacement response law of transmission towers under wind-rain coupling effects and improve the wind-rain resistant design theory, an aeroelastic model with a 1:16 scale ratio was designed based on a prototype of 110 kV cat-head angle steel transmission tower, and multi-condition wind tunnel tests under wind-rain coupling were carried out.From the dimensions of statistical characteristics, power spectrum distribution characteristics and wind vibration coefficient of transmission tower response, the evolution law of wind-induced vibration response under different wind direction angles, wind speeds and rain intensities was compared and explored.The results show that the wind-rain coupling effect will cause changes in the dynamic characteristics of the transmission tower: the fundamental frequencies of the tower along the line and perpendicular to the line are altered, and both the mechanical damping and aerodynamic damping of the tower in the wind-rain coupling environment are changed. The wind vibration coefficient of the transmission tower shows an obvious increasing trend; compared with the case of only wind action, the most unfavorable wind direction angle of the tower under wind-rain coupling changes from 30°to 45°. |
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