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1000kV特高压单回路输电塔属于风敏感结构,风与结构的相互作用十分复杂,风荷载常常是设计的主要控制荷载之一。以某1000kV单回路塔为研究背景,获得了结构的自振动力特性。基于随机振动理论推导了铁塔的风振系数计算公式,研究了垂直线路方向和顺线路方向的振型模态,同时分析了结构各层的风振系数分布特点,并与设计规范进行对比,得出特高压单回路输电塔风振系数计算的经验公式。通过研究,揭示了1000kV特高压单回路塔的风致振动特性,结果可作为特高压铁塔结构抗风设计的参考。
The 1000kV UHV single-circuit transmission tower belongs to the wind-sensitive structure. The interaction between the wind and the structure is very complicated, and the wind load is often one of the main control loads of the design. Taking a 1000kV single-circuit tower as the research background, the self-vibration dynamic characteristics of the structure are obtained. Based on the theory of stochastic vibration, the calculation formula of the wind-induced vibration coefficient of the tower is deduced. The modes of the vertical line direction and the direction of the forward line are studied. At the same time, the distribution characteristics of the wind-induced vibration coefficients of each layer of the structure are analyzed and compared with the design specifications Empirical formula of wind induced vibration coefficient of UHV single circuit transmission tower. Through the research, the wind-induced vibration characteristics of 1000kV UHV single-circuit tower are revealed, and the results can be used as a reference for wind-resistant design of UHV tower structure.