Nonlinear Numerical Simulation Study of Iced Conductor Galloping
LI Li1,2; CHEN Yuan-kun1,2; XIA Zheng-chun3; CAO Hua-jin1,2
1 School of Civil Engineering & Mechanics, Huazhong University of Science & Technology, Wuhan 430074, China;2 Hubei Key Laboratory of Control Structure, Huazhong University of Science & Technology, Wuhan 430074, China;3 China Railway Siyuan Survey and Design Group CO.,LTD. Wuhan 430063, China
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.
2011, Vol. 30 
