Abstract：Focusing on the unclear dynamic response mechanism of ice-covered contact wires under impact load in shock-based de-icing technology, this study takes a single-span ice-covered contact wire as the research object. By combining theoretical derivation with finite element simulation, a dynamic model of the ice-covered contact wire is established. Through the introduction of a dimensionless parameter ξ, a mechanical state criterion ranging from flexible cable to elastic beam is developed, clarifying that the ice-covered contact wire operates in a cable-dominated state under typical parameters. The research indicates that transverse wave propagation exhibits significant dispersion characteristics, with its wave speed dependent on axial tension and equivalent bending stiffness, increasing with higher frequencies; whereas longitudinal wave speed is governed by both the stiffness ratio γ and the mass ratio δ, with increasing ice thickness leading to a decrease in wave speed. This study systematically reveals the wave propagation mechanism in ice-covered contact wires, providing a theoretical basis for the parameter design and engineering application of shock-based de-icing technology.
2026, Vol. 47 
