在严重覆冰状态下，分裂导线往往因子导线间存在过桥覆冰而形成粘合式裹 冰，使输电线路受风面积显著增加和气动外形劣化。为研究粘合式裹冰和子导线独立裹 冰二分裂导线的气动力特性，开展了刚性模型高频天平测力风洞试验，并进一步分析了 两种覆冰类型下气动力特性对舞动稳定性和风偏响应的影响。研究结果表明: ( 1) 粘 合式裹冰导线的升力曲线尖峰突降较小，在大攻角情况下平均升力系数远大于独立裹冰 情况; ( 2) 在 170°风攻角附近，独立裹冰二分裂导线的平均扭矩系数大于粘合式裹冰 情况; ( 3) 两类覆冰导线顺风向脉动风荷载均符合准定常假定; ( 4) 竖向舞动时独立 裹冰导线的稳定性更差，而扭转舞动时粘合式裹冰导线更为不利; ( 5) 在相同风速和 线路条件下，粘合式裹冰导线的风偏响应较独立裹冰导线大，对导线风偏更不利。 

Under severe icing conditions，the iced sub-conductor may be connected by the ice bridge to form a connected ellipse iced conductor，resulting in the increase of windward area and aerodynamic shape deterioration of conductors． In order to study the aerodynamic force characteristics of the connected ellipse iced conductor ( with the ice bridge) and the separated ellipse iced conductor ( without the ice bridge) ，the high frequency force balance wind tunnel tests were conducted． Based on the test results，the effects of aerodynamic force characteristics of two ice accretion types on galloping stability and wind-induced swing response were analyzed． The results show that: ( 1) compared with the separated ellipse iced conductor condition，the lift force curve of the connected ellipse iced two-bundled conductor has a slower drop around peak，and the mean lift force coefficient is much larger in high wind attack angle cases; ( 2) near the wind attack angle of 170°，the mean torque coefficient of the separated ellipse iced conductor is larger than that of the connected ellipse iced two-bundled conductor; ( 3) the drag forces of conductors with the two iced types both satisfied the quasi-steady assumption; ( 4) for the vertical galloping，the separated ellipse iced conductor has worse stability，and for the torsional galloping，the connected ellipse iced conductor is more disadvantageous; ( 5 ) under the same wind velocity and transmission line condition，the wind-induced response of the connected ellipse iced conductor is larger than that of the separated ellipse iced conductor，leading to greater wind-induced swing accident risk．