多尺度法与平均法对新月形覆冰导线舞动特性的影响

为研究多尺度法与平均法对新月形覆冰导线舞动特性的影响，首先进行了覆冰单导线风洞试验，得到了覆冰单导线的气动力系数，接着建立了单档覆冰导线数学模型，推导了覆冰导线的舞动方程，再结合风洞试验所得的气动系数研究了覆冰导线的舞动特性。应用多尺度法研究导线的舞动特性，接着再应用平均法研究导线的舞动特性，最后对比两种定量分析方法对导线舞动特性的影响。结果表明：多尺度法与平均法所得的位移时程曲线基本吻合，相平面图基本重合；多尺度法计算过程繁杂，平均法计算过程简单。可见对于单自由度覆冰导线的舞动特性研究平均法应首选。

Study on the influence of method of multiple scales and averaging on the galloping characteristics of the crescent iced conductor

In order to study the influences of method of multiple scales and averaging on galloping characteristics of crescent iced conductor, firstly, the aerodynamic coefficients of iced single conductor were obtained by wind tunnel test, then the mathematical model of iced single conductor was established, the galloping equation of iced conductor was deduced, then the galloping characteristic of iced conductor was studied by combining the aerodynamic coefficients obtained by wind tunnel test. The method of multiple scales was used to study the galloping characteristics of the conductor, then the method of averaging was used to study the galloping characteristics of the conductor again. Finally, the influence of these two quantitative analysis methods on the galloping characteristics of the conductor was compared. The results show that the curve of displacement obtained by the method of multiple scales and the method of averaging basically coincides with each other, and the phase diagram basically coincides with each other; the calculation process of the method of multiple scales is complex, and the method of averaging is simple. It is concluded that the method of averaging should be the first choice for study of the galloping characteristics of single degree of freedom iced conductor.