新月形覆冰八分裂导线舞动特征研究

摘要

通过风洞试验测量得到典型新月形覆冰八分裂导线各子导线的空气动力系数随风攻角的变化曲线。由于尾流干扰的作用，各覆冰子导线的气动特性存在明显差异。基于得到的覆冰导线的气动参数，利用 ABAQUS 有限元软件，模拟典型覆冰八分裂线路的舞动过程，分析得到不同档距线路在不同风速、初始风攻角以及导线初始张力等条件下的运动轨迹、振动频率、模式和幅值等舞动特征。所得结果对覆冰八分裂导线舞动特征的认识以及舞动防治技术的开发具有重要的价值。%The aerodynamic coefficients of iced crescent-shaped conductor models,varying with the angle of wind attack,were obtained by wind tunnel tests.The aerodynamic characteristics of iced eight bundled conductor may become complicated due to the wake interference around the sub-conductors.Based on the aerodynamic coefficients obtained and with the help of ABAQUS software,galloping behaviors,such as dynamic responses,galloping orbits,frequencies, vibration modes and amplitudes of typical iced eight bundled conductor transmission lines were analysed under the conditions of different span lengths,initial tensions in sub-conductors,wind velocities and angles of wind attack.The results provide galloping behavior recognitions of iced eight bundled conductors and development propects of anti-galloping technology.