Fatigue damage analysis of anchor windproof cables in windy areas considering wind speed probability.

In order to understand the fatigue damage characteristics of anchor windproof cables under strong winds, a comprehensive finite element model of the tower conductor windproof cable system was constructed based on the 110 kV Caoyang line in Turpan. The wind-induced vibration response of windproof cables under strong wind loads was analyzed, based on which a finite element model of cable segments at the outlet of the cable clamp was established. The spatial distribution law of fatigue stress of cable strands was studied, and the fatigue damage of windproof cables in strong wind areas was analyzed. The research results indicate that wind speed has a significant impact on the axial deformation and stress of windproof guy wires. The axial amplitude time history changes of the outer and inner strands of the guy wire are highly consistent. The axial amplitude time history of the outer and inner strands of the guy wire exhibits strong fluctuations under the action of strong winds. Specifically, the higher the wind speed, the greater the stress fluctuation of the inner and outer steel strands of the guy wire. Additionally, the axial stress borne by the inner steel strands of windproof cables is relatively small under wind load, while the stress on the outer steel strands is relatively large. As the wind speed increases, the stress on the windproof cable also increases, and the stress fluctuations of the inner and outer layer strands of the cable become more severe. The fatigue damage of the inner and outer steel strands of the windproof guy wire under strong winds is different, and the fatigue damage of the inner layer of the guy wire is smaller than that of the outer layer. [ABSTRACT FROM AUTHOR]