The structural dynamic characteristics of offshore wind turbines are directly related to the operational safety and equipment reliability of in-service wind turbines
but because of the complex working environment
a single load analysis cannot reflect the structural dynamic characteristics of its actual operating state. In this paper
considering the distinctive configuration attributes of 5-megawatt marine wind energy generators
Kaimal wind speed spectrum is used to establish a three-dimensional model of Marine turbulent flow field
and Kärnä ice force spectrum is combined to build a floating ice mathematical model
and the working conditions of the actual operating environment of offshore wind turbines are reproduced through the arrangement and combination of multiple working conditions. Combined with OpenFAST and EDEM discrete element analysis method
the dynamic response characteristics of wind turbines under wind
wave and ice loads are studied. The results show that the transverse and longitudinal dispositions of the tower top and the transverse and longitudinal bending moments of the tower are greater than that of the single load
but the cumulative fatigue damage caused by the coupling load is smaller than that of the single load.
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