Abstract
The development of the world power industry has led to studies focused on high-performance materials to enhance the durability and prolong the service life of existing structures. In this context, cross arm is one of the main components of an electricity-transmission structure. The application of composite units (insulated cross arm) on lattice transmission towers was evaluated using the software Ansys 2020 R2 in terms of efficiency, cost, and mechanical performance, compared to conventional transmission towers. Finite-element analysis results demonstrated reductions in internal forces, displacements, and support reactions when the insulated cross-arm (IC) tower structure was employed instead of the conventional cross-arm (CC) tower structure. This could lead to minor structural costs. The IC tower exhibited a better stability under free vibrations owing to its higher stiffness than that of the CC tower. The main reason for these results was the height reduction proportioned by IC structures.
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