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Research on Damping Characteristic of Electrical Transmission Tower-line System with Viscoelastic Dampers

Gan Feng-lin;Jiang Hai-long;Zeng Cong;Guo Sheng;Northeast Dianli University;  
Installing viscoelastic dampers on electrical transmission tower will significantly reduce the wind-induced vibration response of electrical transmission tower-line system. Quantitative research on damping characteristic of transmission tower with viscoelastic dampers tower has important theory meaning to transmission tower performance-based vibration reduction design and strengthening.Taking electrical transmission tower with viscoelastic dampers as research object,based on the formula of strain energy in design code,a calculation method of equivalent damping ratio based on the concept storey of transmission tower is put forward,and through finite element model,the responses of transmission tower with viscoelastic dampers model and the one with additional damping ratio model are compared. The simulation results show that the calculation method of equivalent damping ratio has high precision,and the errors are less than 5% in multi engineering conditions.
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