RESEARCH ON THE MECHANICAL BEHAVIOR OF TRUSS-TYPE SUPPORTING STRUCTURES FOR WIND TURBINE

The high single power，large wind leaf size and high hub height have been the main features of the offshore wind turbine． Due to the easy local buckling，difficulty of the construction and the lateral low rigidity，cone type supporting structures cannot meet the development requirements of offshore wind turbines． Therefore，a truss type supporting structure was presented to overcome the weakness of the cone type supporting structures． Its static properties，dynamic properties and wind-induced vibration effect were analyzed，and following conclusions were obtained: under similar steel consumption，the horizontal bearing capacity of truss type supporting structure was 46% higher than that of cone type supporting structures，and wind-induced vibration factor was 19. 3% lower than that of cone type supporting structures． Therefore，the structural property of cone type supporting structures is better than the cone type supporting structures．