A FEA model of seven continuous span conductors and insulators on UHV transmission line in heavy icing area was established for ice-shedding simulation analysis. Some parameters were considered in the analysis, including the damping ratio, the ice-shedding modes and the ice thickness. The dynamic responses of jumping height, unbalanced tension and vertical load at the ends of insulators were obtained. Effects of different parameters on dynamic responses were studied. The values of unbalanced tensions and vertical loads were determined on the UHV suspension tower in heavy icing area. For the case of ice shedding in one span conductor with 5% damping ratio, the proportion of unbalanced tension to maximum working tension is lower than the value regulated in design rules. The dynamic magnification factor of vertical load is from 1. 28 to 1. 40. For the suspension tower in 20 mm or 30 mm icing area, the proportion of up-pull load to maximum working tension is recommended to be 10 percent. In 40 mm or 50 mm icing area, the proportion is recommened to be 5 percent.%通过建立重冰区特高压线路连续7档导线-绝缘子脱冰跳跃分析模型,考虑阻尼、脱冰模式和覆冰厚度等因素影响,计算脱冰工况下导线跳跃高度、张力、挂点不平衡张力及垂直荷载等动力响应,研究不同因素对悬垂型杆塔动力响应的影响规律,确定重冰区特高压线路悬垂型杆塔不平衡张力及垂直荷载取值.阻尼比5％、单档100％脱冰时,脱冰跳跃产生的不平衡张力百分数均小于重冰区设计规定值,垂直荷载动力放大系数在1.28 ～ 1.40之间.20 mm、30 mm冰区导线上拔力占最大使用张力百分数取10％,40 mm、50 mm冰区取5％.
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