Finite element modeling of transmission line galloping based on 6-DOF node

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (8) : 112-117.

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Finite element modeling of transmission line galloping based on 6-DOF node

Yan Zhi-tao; Li Zheng-Liang;Yang Zhen-hua

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Abstract

The coupling of translational and torsional movement, the non-linearity cannot be considered in traditional galloping transmission line analytical model of 3-DOF node. Based on the strain - displacement relations of spatial curved beam theory, the finite element model of iced transmission line galloping is proposed, which contains three translational degrees of freedom and three rotational degrees of freedom. based on virtual work principle, the updated Lagrange nonlinear equations of motion iced conductor are formulated considering the aerodynamic non-linear and geometric non-linear. The Newmark time integration and the Newton-Raphson iteration method is used to solve non-linear finite element equation. An example analysis showed that the iced cable element of 6-DOF node used to calculate the static and dynamic power lines and the galloping analysis is accurate. The results of transmission line galloping analysis show that the cross-section bending modulus of the transmission line has a certain impact on translational and torsional movement.

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6-DOF / transmission lines / galloping / finite element / nonlinear

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Yan Zhi-tao;Li Zheng-Liang;Yang Zhen-hua. Finite element modeling of transmission line galloping based on 6-DOF node [J]. Journal of Vibration and Shock, 2011, 30(8): 112-117