Research on wind-induced vibration of down lead transmission lines based on motion tracking method
Down lead transmission lines in substations experience significant wind-induced vibrations when subjected to wind loads.The vibration of the down lead transmission lines can not only cause damage to themselves but also to the link fittings,potentially leading to failures in the entire system.Utilizing motion tracking method,images depicting the motion states of a typical substation down lead transmission lines model under wind load were obtained in wind tunnel tests.Dynamic parameter identification was completed through the displacement time history of multiple feature points in the images.The first-order frequency of the structure,identified using the random subspace method,is around 4Hz,with a wide range of damping ratios from 0.002 5 to 0.03,all indicating low damping.Research show that motion tracking methods based on image recognition can identify wind-induced large deformations of down lead transmission structures and can obtain structural dynamics information.
down lead transmission lines in substationwind-induced vibrationmotion tracking methodwind tunnel test
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