脉动风作用下悬垂绝缘子串风偏计算模型及特性分析  

Calculation Model and Characteristic Analysis of Wind-induced Deflection of Suspension Insulator String Under Fluctuating Wind

作　　者：闫聪 谢强[1,2] 邹峥[3] YAN Cong;XIE Qiang;ZOU Zheng(College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Performance Evolution and Con-trol for Engineering Structures,Ministry of Education,Shanghai 200092,China;North China Power Engineering Co.,Ltd.,China Power Engineering Consulting Group,Beijing 100120,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]工程结构服役性能演化与控制教育部重点实验室,上海200092 [3]中国电力工程顾问集团华北电力设计院有限公司,北京100120

出　　处：《高电压技术》2024年第12期5327-5337,共11页High Voltage Engineering

基　　金：国家自然科学基金(52278523)。

摘　　要：为探究脉动风下悬垂绝缘子串的动态风偏及其特性,弥补对其研究多集中于静力公式计算和有限元分析的不足,并为实际工程设计和线路风偏防治提供理论参考。假定脉动风下导线的响应为小变形并忽略其振型和连续档的影响,通过分析无高差线路中绝缘子串和导线的受力状态,在静力公式基础上引入惯性力,并考虑气动阻尼效应,根据达朗贝尔原理建立悬垂绝缘子串的风偏动力方程,可用4阶龙格库塔法对其进行求解。通过算例分析发现,该理论模型能够有效计算绝缘子串的风偏时程,且风偏角度围绕其均值浮动的范围会随风速的增大而减小;同时,脉动风对目标绝缘子串风偏角的动力放大系数主要在1.05~1.45之间,该动力放大效应不可忽视并会随着风速的增大而减小。This paper aims to explore the dynamic wind-induced deflection of suspension insulator string under fluctuat-ing wind and its characteristics,to make up for the deficiency of its research mainly focuses on static formula calculation and finite element analysis,and to provide theoretical reference for design of practical projects and prevention of wind-induced deflection.The response of conductor under fluctuating wind is assumed to be small deformation and the effects of its vibration mode and continuous spans are ignored.By analyzing the force state of insulator string and con-ductors in the transmission line without height difference,inertial force is introduced on the basis of static formula,and the aerodynamic damping effect is considered.According to the d'Alembert’s principle,a dynamic equation of wind-induced deflection of suspension insulator string is established and it can be solved by the fourth-order Runge-Kutta method.Through case analysis,it is found that this theoretical model can be adopted to effectively calculate the time his-tory of insulator string’s wind-induced deflection,and the range of wind-induced deflection angle floating around its mean value decreases when wind speed increases.Besides,the dynamic amplification factor of fluctuating wind on the target insulator string’s wind-induced deflection angle is mainly between 1.05 and 1.45,so the dynamic amplification effect cannot be ignored and it will decrease with the increase of wind speed.

关 键 词：悬垂绝缘子串 风偏 气动阻尼效应 动力方程 分布特征 动力放大效应 

分 类 号：TM216[一般工业技术—材料科学与工程]