摘要
考虑到重冰区的特高压输电线路更容易形成接近扇形的覆冰,结合风洞实验及数值模拟方法研究了扇形覆冰八分裂导线的舞动特征。通过扇形覆冰八分裂输电线的节段模型风洞实验,获得各覆冰子导线随风攻角变化的气动参数。在ABAQUS软件中建立单档扇形覆冰八分裂输电线路的有限元模型,通过程序UEL输入各覆冰子导线的气动参数,根据数值模拟结果可获得舞动轨迹及振幅等舞动特征,最后讨论了风速、档距和初始风攻角对八分裂导线舞动特征的影响。
The sector-shape iced eight UHV (ultra-high voltage) bundled conductors are in a condition more similar to the heavy ice conditions than that of the crescent-shape ice. Test models of sector-shape cross section iced eight bundled conductors are prepared. The aerodynamic coefficients of the sector-shape iced conductor models varying with the wind attack angle are obtained by the wind tunnel test. Based on the wind tunnel test results of sector-shaped iced eight bundle conductors, the numerical methods are used to study the effects of critical parameters on the galloping of eight sector-shaped iced conductors. The effects of the wind velocity, the span length and the initial wind attack angle on the galloping of sector-shaped iced eight bundled iced conductors are investigated. The result shows that the sector-shaped iced eight conductors can reflect the galloping characteristics of eight bundle conductors under heavy ice conditions.
作者
蔡萌琦
徐倩
周林抒
刘小会
严波
CAI Mengqi;XU Qian;ZHOU Linshu;LIU Xiaohui;YAN Bo(School of Architecture & Civil Engineering,Chengdu University,Chengdu 610106,China;School of Architecture & Environment,Sichuan University,Chengdu 610044,China;Sichuan Electric Power Test & Research Inst,Chengdu 610016,China;School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China;School of Aeronautics & Astronautics,Chongqing University,Chongqing 400044,China)
出处
《力学与实践》
北大核心
2018年第6期630-638,共9页
Mechanics in Engineering
基金
国家自然科学基金资助项目(51507106
51308570)
关键词
扇形覆冰
八分裂导线
舞动
风洞试验
sector-shape ice
eight bundled conductors
galloping
wind tunnel test
