中文摘要：

本文对覆冰导线节段模型进行风致舞动的风洞试验,研究了覆冰导线在竖向、横向和扭转方向的振动特性及主导频率随风速的变化特征。研究发现,覆冰导线的舞动可以分为竖向舞动和竖向-扭转耦合舞动,竖向舞动是竖向气动负阻尼引发的竖向自激振动,通常只发生在特定风速,而竖向-扭转耦合舞动容易在临界风速以上的风速下发生,属于扭转方向气动负阻尼诱发的舞动。3个方向振动的主导频率是随风速的变化而不断变化,但在导线发生舞动时3个方向振动的主导频率总是一致的。最后,结合舞动的特征进一步为覆冰导线舞动防治提供了一些建议。

英文摘要：

This paper performed a wind tunnel test of crescent iced conductor aeroelastic models, and analyzed the vibration and spectral characteristics of the iced conductor under different wind speeds and attack angles. The re- suits show that the galloping of iced conductor can be divided into vertical galloping and vertical-torsion coupling galloping. The vertical galloping is a vertical self-excited vibration due to the negative aerodynamic damping in ver- tical, and generally only occur in a few specific wind speeds and attack angles. The vertical-torsional coupling gal- loping is generated by the negative aerodynamic damping in torsion. When the galloping happened, the vibration frequencies of the three directions become the same values. Combined with the characteristics of galloping, some suggestions are provided for the control and prevention of the iced conductor galloping.