静风荷载作用下覆冰导线的动力特性

摘要

在风荷载作用下均匀覆冰导线静力构形和动力特性的分析中,通过对三种静力构形计算方法的比较,给出静风荷载作用下均匀覆冰导线的静态构形计算公式.由静风荷载作用下覆冰导线动力特性分析可知,考虑静风荷载作用的覆冰导线自振特性分析能更全面的反映导线模态随弹性几何参数变化的规律及导线模态间耦合关系,该模态可作为基函数建立用于导线动力响应分析的离散模型.%The static shape and dynamic characteristics of iced transmission lines under static wind loads were analyzed. The formulary of static shape of iced transmission lines under static wind loads was introduced with comparison of three analysis methods. Based on the analysis of dynamic characteristics of iced transmission lines under static wind, it was known that the inherent vibration analysis of iced transmission lines under static wind can more fully reflect the mode shape change with elastic wire geometry parameters and the relationship between modal coupling. That model can be used as basic function for establishing the discrete model of wire dynamic response analysis.