【摘要】 西藏地区输电线路因常年处于大风环境频发风偏闪络，甚至风致倒塔等事故。鉴于此，以西藏自治区220 kV输电线路工程为背景，开展酒杯型输电铁塔及塔线体系风振响应分析及抗风设计理论研究。首先，提出能准确反映输电铁塔及塔线体系的风振分析方法，采用Davenport风功率谱和AR法模型方法模拟三维脉动风荷载并施加于输电塔线体系有限元模型，然后基于随机振动理论计算输电塔线体系的振动响应和风振系数。基于上述所提方法，对西藏线路酒杯型输电铁塔及其典型线路进行仿真模拟计算，探讨塔线体系在各风向下的振动响应和风振系数影响规律，并与现行规范进行对比分析。结果表明：现行规范用于输电铁塔的抗风设计存在设计不合理现象，整体过于保守，且存在部分设计不安全现象，亟需改进。更多还原

【Abstract】 Due to the perennial windy environment, the transmission lines in Tibet frequently experience accidents such as wind-induced flashovers and even tower collapse. Based on a 220 kV transmission line project in Tibet, a study of wind-induced vibration response and the corresponding structural design of a cup-type transmission tower-line system was carried out. Firstly, a method for analyzing wind-induced vibration analysis method was proposed to accurately simulate the dynamic behavior of the transmission tower-line system. The Davenport wind power spectrum and the AR model were employed to simulate the 3D fluctuating wind load, which was then applied to the finite element model of the transmission towerline system. By combined these methods, dynamic response and wind-induced vibration coefficients of the transmission tower system were calculated on the basis of random vibration theory. Secondly, based on the above methods, simulation calculations were conducted on the cup-type transmission tower and its typical lines in Tibet. The study investigated the vibration response and wind-induced vibration coefficients of the tower-line system under different wind directions. A comparative analysis with current design codes reveals that the existing specifications lead to unreasonable outcomes in the wind-resistant design of transmission towers: the overall design is overly conservative, certain aspects remain unsafe, indicating an urgent need for improvement.更多还原