Theoretical and numerical analysis of stability of galloping of power transmission lines
The stability of galloping of overhead electric transmission lines is investigated based on a model with two degrees of freedom. From the differential equations of motion, it is shown that there are two kinds of coupling between vertical and torsional vibration of iced transmission lines under wind excitation. The averaged equations corresponding to non-resonance and 1:2 internal resonance are given respectively by the averaging method. In terms of Routh-Hurwitz criterion, the stability of the trivial fixed points is discussed to study the influence of wind speed, thickness of ice, initial tension force and mass of unit length of transmission lines. The numerical simulations are in good agreement with the theoretical analysis.
electric power transmission lines galloping stability internal resonance
Xinye Li Huabiao Zhang Yinshan Li
School of Mechanical Engineering,Hebei University of Technology,Tianjin 300130,P.R.China
国际会议
第六届国际振动工程会议(The 6th International Conference on Vibration Engineering)(ICVE’ 2008)
大连
英文
2008-06-04（万方平台首次上网日期，不代表论文的发表时间）