Numerical Simulation for Galloping of Iced Quad-Bundled Conductor under Stochastic Wind Load

The galloping of iced quad-bundled conductor under the action of stochastic wind load is investigated. A three-node cable element with three translational and one torsional degrees-of-freedom at each node is employed to discretize the bundled conductor and the two-node Euler-Bernoulli beam elements are used to simulate the spacers. With the Kaimal spectrum and the Davenport mutual spectrum, the samples of stochastic wind are numerically simulated by means of the WAWS. The finite element equation is solved by the Newmark time integration method and the Newton-Raphson nonlinear iteration strategy. The numerical results indicate that the galloping amplitude of iced quad-bundled conductor under stochastic wind load is larger than that as wind is simplified as steady.