The vibration control and performance evaluation on a transmission-tower line system by using friction dampers subjected to\nwind excitations are carried out in this study. The three-dimensional finite element (FE) model of a transmission tower is firstly\nconstructed. A two-dimensional lumped mass model of a transmission tower is developed for dynamic analysis. The analytical\nmodel of transmission tower-line system is proposed by taking the dynamic interaction between the tower and the transmission\nlines into consideration. The mechanical model of passive friction damper is presented by involving the effects of damper axial\nstiffness. The equation of motion of the transmission tower-line system incorporated with the friction dampers disturbed by wind\nexcitations is established. A real transmission tower-line system is taken as an example to examine the feasibility and reliability of\nthe proposed control approach. An extensive parameter study is carried out to find the optimal parameters of friction damper and\nto assess the effects of slipping force axial stiffness and hysteresis loop on control performance. The work on an example structure\nindicates that the application of friction dampers with optimal parameters could significantly reduce wind-induced responses of\nthe transmission tower-line system.
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