【摘要】 输变电塔体系遭受风雨耦合作用破坏时常将原因归于风荷载，忽略了雨荷载耦合激励的放大效应。针对某输电线路“一塔两线”体系模型，以数值方法模拟良态风雨场与湿下击暴流场的风雨时程荷载，分别对塔线体系进行动力响应分析，结果表明：降雨对输电塔线体系的响应，具有显著影响，随着雨强变大，塔线体系响应增大明显；在极值降雨条件下，湿下击暴流场塔顶位移增幅最大，在X向和Y向分别达到31.30%和33.93%;两种风雨场中塔顶位移及加速度功率谱密度均出现明显增幅，体系共振响应增强，塔身关键位置主材应力分别增大了11.64%、37.07%;在不同类风场中，强降雨时雨滴冲击对塔线体系产生的激励增大作用不可忽略。更多还原

【Abstract】 The damage of transmission and transformation tower system under wind-rain coupling often attributes to wind load, ignoring the amplification effect of rain load coupling excitation. Based on the tensioning tower system model of a transmission line, the time-history loads of wind and rain in a normal weather field and a wet downburst field are simulated. The dynamic response analysis of the tower-line system is carried out. The results show that the rainfall has a significant impact on the response of the transmission tower-line system. With the increase of rainfall intensity, the response of the tower-line system increases obviously. Under the condition of extreme rainfall, the displacement of tower top in wet downburst field increased by 31.30% in X direction and 33.93% in Y direction, respectively. The displacement and acceleration power spectral density of the tower top increased significantly in both wind and rain fields, and the resonance response of the system was enhanced. The stress of the main material at the key position of the tower increased by 11.64% and 37.07%,respectively. In different wind fields, the increasing incentive effect of raindrop impact on tower-line system during heavy rainfall cannot be ignored.更多还原