Fatigue Analysis and Applications in Design of the Jacket-type Offshore Wind Turbine

  • 謝 旻軒

Student thesis: Master's Thesis

Abstract

At present there is no complete design software for offshore wind turbine design in Taiwan Based on the design load cases provided by IEC64100-3 and reasonable assumptions in addition to considering the wind waves currents and water level this study takes the geographical location of Taiwan further considers the earthquake In addition according to DNVGL-RP-C203 to develop the fatigue design program of offshore fan structure the design results of the ultimate design load cases are firstly introduced into the fatigue design load case to obtain the internal force of each element and determine the joint type and stress concentration factor (SCF) to simplify the calculation of the concentrated stress of the connect section Second using rainflow method count and Miner's rule and different fatigue design load case probability and wind speed distribution calculate the weight to get fatigue lifetime Finally take offshore wind turbine design lifetime as 20 years when the analysis result is less than the target value the Broyden method will be used to calculate the section thickness The analysis result will reach the fatigue design load case and the ultimate design load cases simultaneously In this study according to the standards a complete design load case can be analysis and design jacket-type offshore wind turbine and the total design steel weight with high strength forging steel which can be used as a reference for offshore wind turbine designer Note that the computer programs developed by the research team of Shen-Haw Ju are open and free to use
Date of Award2018 Feb 14
Original languageEnglish
SupervisorShen-Haw Ju (Supervisor)

Cite this

Fatigue Analysis and Applications in Design of the Jacket-type Offshore Wind Turbine
旻軒, 謝. (Author). 2018 Feb 14

Student thesis: Master's Thesis