摘要
采用风洞试验获得典型新月形覆冰四分裂导线的升力、阻力和扭矩系数随风攻角的变化规律。基于ABAQUS有限元软件提出一种考虑偏心覆冰作用的导线数值模拟方法,并利用算例验证了该方法的正确性。在此基础上,利用ABAQUS用户自定义子程序UEL编写气动载荷单元,实现考虑偏心覆冰作用的导线舞动数值模拟方法。采用该方法与传统数值模拟方法对典型新月形覆冰四分裂导线的舞动特征进行对比分析。结果表明,该方法能准确反映覆冰导线运动过程的扭转特性。考虑偏心覆冰作用后,覆冰四分裂导线的位移和扭转角幅值明显增大,振动形态更为复杂。因此,在研究覆冰导线舞动时,有必要考虑偏心覆冰作用的影响。
The variation laws of lift,drag and torque coefficients of a quad-bundle conductor with typical crescent icing were obtained with wind tunnel tests.A numerical simulation method for iced conductor galloping considering effects of eccentric icing was proposed based on the FE software ABAQUS,and the correctness of the method was verified with examples.The user self-defined subroutine UEL in ABAQUS was used to program an aerodynamic load element,and realize the numerical simulation method for iced conductor galloping considering effects of eccentric icing.The proposed method and the traditional numerical simulation one were used to contrastively analyze galloping characteristics of a quad-bundle conductor with typical crescent icing.The results showed that the proposed method can be used to accurately describe the torsional feature of the iced conductor motion;after considering effects of eccentric icing,displacement and torsional angle amplitudes of the iced quad-bundle conductor obviously increase and its vibration mode is more complex;it is necessary to consider effects of eccentric icing when studying galloping of iced conductor.
作者
伍川
叶中飞
严波
杨晓辉
张博
吕中宾
WU Chuan;YE Zhongfei;YAN Bo;YANG Xiaohui;ZHANG Bo;L Zhongbin(State Grid Henan Provincial Electric Power Research Institute,Zhengzhou 450052,China;State Grid Key Lab of Power Transmission Line Galloping Prevention and Control Technology,Zhengzhou 450052,China;College of Aerospace Engineering,Chongqing University,Chongqing 400044,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第1期29-36,共8页
Journal of Vibration and Shock
基金
国家电网公司总部科技项目(52170218000F)资助
关键词
偏心覆冰
舞动
四分裂导线
数值模拟
eccentric icing
galloping
quad-bundle conductor
numerical simulation
