Nonlinear Numerical Simulation Study of Iced Conductor Galloping

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (8) : 107-111.

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Nonlinear Numerical Simulation Study of Iced Conductor Galloping

LI Li1,2; CHEN Yuan-kun1,2; XIA Zheng-chun3; CAO Hua-jin1,2

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Abstract

The galloping of iced conductors is a serious threat to the safety of the transmission lines. A two-node
bar element having three translational and a torsional degree-of-freedom at each node was employed to model the
conductor. Combined with the method of the bundle conductor equivalence to a single conductor, the finite
element model of multi-span transmission line for galloping analysis was established. In addition, the
aerodynamic coefficient of iced conductor under different wind attack angle was obtained through computational
fluid dynamics method. On the basis of the finite element model and aerodynamic coefficient curve, the
Runge-Kutta method was applied to carried out nonlinear numerical simulation of iced conductor galloping and
the FORTRAN program was compiled. The galloping of the long-span transmission line crossing Hanjiang River
was analyzed. The results indicate that the presented method and program are reliable and efficient. Meanwhile,
the impact of the wind velocity and initial attack angle on galloping were investigated with the program. They can
provide references for the further study of galloping.

Key words

iced conductor / galloping / computational fluid dynamics / aerodynamic coefficient

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LI Li;CHEN Yuan-kun;XIA Zheng-chun;CAO Hua-jin;. Nonlinear Numerical Simulation Study of Iced Conductor Galloping[J]. Journal of Vibration and Shock, 2011, 30(8): 107-111