覆冰导线舞动数值仿真分析

Numerical simulation on galloping of iced donductors

利用ABAQUS有限元分析软件,通过欧拉梁单元的自由度释放和设置材料为不可压缩,模拟得到具有扭转自由度的覆冰导线的索单元,进一步利用用户自定义单元模拟覆冰导线所受的阻力、升力和扭矩空气动力载荷,分析了覆冰导线的舞动现象,并通过覆冰单导线与覆冰双分裂导线舞动模拟算例验证了方法的正确性。模拟研究了覆冰初始攻角、线路档距和导线初始张力等因素对覆冰导线舞动的影响规律。所得结果对覆冰导线舞动和防舞技术的研究具有一定的参考价值。

To investigate galloping of iced conductors,with the release of the bending degree-of-freedom of Euler beam element and setting the material to be ＇No Compression＇ in ABAQUS software,a cable element with torsion degree-of-freedom is obtained.And then the aerodynamic loads including drag,lift and torque on the iced conductor are simulated by means of the user-defined element.The galloping of iced single conductor and iced twin bundle conductor are numerically analyzed to demonstrate the efficiency of the proposed method.The effects of initial attack angle,span length and initial tension in conductor on the behavior of galloping are investigated by numerical simulation.