Floating offshore windtower

摘要

A floating support structure comprises a watertight hull 1, a gravity or suction foundation comprising one or more components 7 located on the seabed and one or more buoyancy devices 4 connected to said watertight hull and configured to provide excess buoyancy and additional stability. The watertight hull and buoyancy device assembly is tethered to the foundation such that the excess buoyancy is manifested as a force in the tethers. A telescopically extendable shaft 3 extends upwardly from the hull and has a hoist 9 located at the shaft top. A wind turbine 8 may be located at the top of the shaft while a generator may be located in the hull. The structure can be towed with the shaft retracted and subsequently extended and grouted following installation. A method of connection several of the structures using horizontal connectors is also disclosed.