输电线路脱冰跳跃高度的理论计算公式  

Theoretical formula for jump height of transmission line after ice-shedding

作　　者：谢献忠[1] 黄伟[1] 李丹[1] 王文军[1] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2016年第2期53-57,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(11272119);湖南省教育厅重点项目(12A052)

摘　　要：将输电线的脱冰荷载视为一种突加动荷载,考虑阻尼的衰减效应,基于功能原理和能量守恒定律,推导了导线跳跃高度的理论计算公式.该公式揭示了脱冰跳跃的动力学本质,建立了跳跃高度与弧垂差的定量关系.算例分析表明,公式计算结果与有限元结果吻合良好,满足工程设计要求,可为输电线路设计提供理论指导.In consideration of the attenuation effect of damping,the ice-shedding loadings of transmission lines was regarded as a kind of sudden dynamic loadings on the basis of the principle of function and law of conservation of energy,and the formula for transmission lines jump height was deduced. The dynamics essence of jump induced by the ice-shedding was revealed in the formula,a quantitative relation between the jump height and the amplitude difference was built. The example analysis shows that the results between the formula and the finite element correspond well, which meets the engineering design requirements and provides theoretical guidance for transmission lines design.

关 键 词：输电线路 脱冰 冰跳高度 能量转换 有限元 

分 类 号：O321[理学—一般力学与力学基础] TM75[理学—力学]