Abstract

A comprehensive analysis of the dynamic response of monopile-supported offshore wind turbines under the combined effects of earthquakes, wind, and waves is proposed, and a new dynamic p-y relationship that can reasonably reflect soil degradation is used to simulate soil-pile interactions. The offshore wind turbine model integrates the effects of combined random wind and wave and hydrodynamic loads as well as different scour conditions, and systematic seismic analysis is performed. The results show that scour induces excessive displacements and bending moments in the offshore wind turbine structure under the combined loads. As the scour depth increases, the combined load effect becomes less pronounced and the response is mainly caused by wind and wave loads. These results can provide a reference for the seismic response of monopile-supported offshore wind turbines located in a complex parallel environment.

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