Study on Numerical Simulation of Iced Conductor Galloping for Multi-Span Power Transmission Lines

Abstract

The general expression of Lagrange nonlinear cable element is established firstly by using virtual work principle. On the basis of the theory, the specific expression of a two-node cable element having rotational degree of freedom is derived and the non-linear 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. Based on the finite element model and aerodynamic characteristics of the iced conductor, the Runge-Kutta method was applied to carried out non-linear numerical simulation of iced conductor galloping and the Matlab program was compiled. The galloping of the multi-span transmission line crossing Hanjiang River was analyzed. The results indicate that the presented method can simulate the galloping process effectively and it can provide the basic references for further research of preventing galloping.

Nonlinear dynamic analysis of galloping of a single iced conductor with four degrees of freedom based on curved beam theory

“…The finite element model, combined with the time iterative algorithm, can readily simulate various interactions and the nonlinear effects. On this basis, two- and four-node finite element models were obtained by different methods, which would be used for the analysis of multi-span transmission lines (Li et al, 2011; Li et al, 2011; Liu et al, 2009). Zhang et al (2000) used a hybrid model to analyze conductor galloping and provided validation by comparing the experimental and the simulated data.…”