Evaluation of dynamic effects in the response of offshore wind turbines using incremental wind-wave analysis

Different methods for analyzing and evaluating offshore wind turbines under combined and single wind and wind loads are discussed. In areas, where dynamical analysis is required due to high wave height and high structure height, the accuracy of the results obtained from regular models will be discussed that statically analyze the behavior of the structure. The most correct approach to investigate the dynamical behavior of offshore structures against wave and wind force is to use longterm and irregular time series of water level and wind force on the offshore wind turbine. Because of time consuming and complex interpretation of results and high data volume, there is a need for alternative methods with appropriate accuracy in short-term period. The purpose of this study is to provide a more accurate and practical method than statistical and spectral methods to evaluate the response of wind turbines under loading of both wave and wind time series. Furthermore, the incremental wind-wave analysis is used. The results show that the response of the offshore wind turbine support structure, which is a jacket platform, is more affected by the waves. While turbine tower responses are mostly affected by wind force on wind turbine blades.