重庆大学学报2025，Vol.48Issue(10)：20-33,14.DOI:10.11835/j.issn.1000-582X.2024.264
不均匀覆冰导线脱冰塔线体系动力响应特征参数
Dynamic response characteristics of tower-line systems after ice-shedding from conductors with non-uniform icing
摘要
Abstract
Variation in ice thickness with altitude results in a non-uniform icing distribution on conductors.This study defines non-uniform icing and ice-shedding conditions and employs an additional element method to numerically simulate the dynamic response of tower-line systems after ice-shedding from conductors with non-uniform icing.Finite element models of typical isolated and multi-span tower-line coupling systems for 500 kV quad-bundle transmission lines are established,and their dynamic responses are analyzed.The variation patterns of characteristic parameters,including load impact factors,maximum reaction forces at connection points,longitudinal unbalanced tension,and de-icing jump height,with respect to line span,elevation difference ratio,and icing thickness are examined under varying structural,icing,and ice-shedding parameters.The strength of towers under extreme conditions is also analyzed.The obtained results provide critical guidance for the design of transmission tower heads in ice-prone regions.关键词
输电塔线耦合体系/不均匀覆冰/脱冰/动力响应特征参数/数值模拟Key words
transmission tower-line coupling system/non-uniform icing/ice-shedding/dynamic response/numerical simulation分类
信息技术与安全科学引用本文复制引用
刘沁雨,严波,吴楷文,杨寒旭,鲁俊,梁明,刘炯..不均匀覆冰导线脱冰塔线体系动力响应特征参数[J].重庆大学学报,2025,48(10):20-33,14.基金项目
国家电网公司科技项目(5200-202126072A-0-0-00).Supported by Science&Technology Program of State Grid Corporation of China(5200-202126072A-0-0-00). （5200-202126072A-0-0-00）
