中文摘要：

为了分析输电线微风振动的机理和风能输入功率，将输电线微风振动简化成二维圆柱绕流，研究了基于计算流体力学的数值仿真方法。首先计算静止输电线在亚临界横向风场中卡门涡街脱落，通过与经典文献相比证明了模型的有效性。接下来用该模型计算了振荡输电线的振幅对涡街脱落的影响规律，并在此基础上计算了输电线风能输入功率与其振幅的关系。经过与风洞实验曲线比较分析，证实了微风振动的机理和其自限性特点，研究了不同风能输入功率曲线的适用性。

英文摘要：

In order to analyze the mechanism of aeolian vibrations of transmission lines and the wind energy power input, a numerical simulation method has been studied based on the computational fluid dynamics （CFD）. The aeolian vibration of transmission lines has been simplified to a two-dimensional cylinder surrounded by unsteady wind flow. Firstly, the Karman＇s vortex street behind the static transmission line has been calculated in the subcritical crosswise wind field. Through compared with the classical literature the model has been proven valid. Then the influence of the oscillation amplitude to the Karman＇s vortex has been analyzed using the oscillating transmission line model. Based on these researches, the relationship between the oscillation amplitude and wind energy power input has been obtained. By comparing with the curve obtained from a series of wind tunnel experiments, the mechanism of aeolian vibrations and their self-limit characteristic has been confirmed. In addition, the serviceability of the different wind energy power input curves has been studied.