Background and Objectives: as the expansion of offshore wind farms in the world and offshore wind turbines to generate electricity, it is significant to consideration the support structures of wind turbines and also to improve their productivity by considering the irregular and accidental conditions of offshore areas. In this study, the efficiency of viscous dampers, that known as one of the passive control methods in vibrations control system of structures as well as offshore platforms, in improving the response of full-height lattice tower for an offshore wind turbine in the time-domain analysis is investigated. For this purpose, several dampers are used diagonally on the platform and also along the legs to determine its best efficiency.

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