【摘要】 按照基本缩尺律,设计、制作出模拟输电塔-线体系的一塔两跨线完全气弹模型,并通过大气边界层风洞试验,测试了各种风速下输电塔在挂线和不挂线工况下的位移与加速度响应,观测了输电塔-线体系的极限风荷载和风毁模式,同时通过测量导地线线端应变和绝缘子应变,得到导地线传递给输电塔的静、动力风荷载。研究了塔线耦联对输电塔风振响应的影响,分析了单塔与输电塔-线体系气弹模型风振响应随风速的变化规律和频谱特点,得到了若干对输电塔抗风设计有参考价值的结论。更多还原

【Abstract】 According to scaling laws,a full aero-elastic model with one tower two power lines for simulating electrical transmission tower-line systems was manufactured.Displacements and accelerations of the aero-elastic model of an electrical transmission tower with or without power lines under various wind speeds were investigated through boundary layer wind tunnel tests.The tower-line model under the maximum wind loads and wind-induced damage mode were also observed.The static and dynamic loads on an electrical transmission tower transferred from power lines were acquired by measuring the strains of the insulators and the ends of the lines.The effects of coupling between tower and power line on wind-induced vibrations of electrical transmission towers were investigated,and the wind induced responses with various wind speeds,as well as the characteristics of the spectra of wind induced dynamic responses,of the aero-elastic model of electrical transmission towers with or without power lines were analyzed.更多还原