Modeling of Transmission Conductor Based on Two-node Isoparametric Truss Elements and Application for Ice-shedding Analysis

摘要

In the analysis of ice-shedding vibrations, commercial finite element software, such as ANSYS, ADINA, are mainly employed to build finite element model. However, it's difficult to build finite element model for complicated ice-shedding scenarios. Therefore, a mathematical model for the dynamic analysis of transmission conductor is built in this paper based on two-node isoparametric truss elements. Firstly, the two-node isoparametric truss element is adopted to build the static and dynamic equilibrium equations of conductor. Furthermore, the Newton- Raphson method is employed to solve static equilibrium equations of iced transmission conductors. The dynamic response of ice-shedding is obtained from the solution of dynamic equilibrium equations by the combination of Newmark and Newton- Raphson method. Finally, this method is applied to simulate ice-shedding from a full-scale span. The performance comparison between this method with the experiment and FEM software shows that the proposed method has the nearly same precision and is more flexible to analyze complicated ice-shedding scenarios.