- document
-
Koetzier, Daan (author)Floating offshore wind turbines offer a means to access wind resources in waters that are too deep for bottom-fixed offshore wind turbines. To operate a floating wind farm, it must be possible to perform maintenance on the turbines. A critical maintenance aspect is the exchange of a major component such as a blade. It involves a lift of a large...master thesis 2023
- document
-
Ruiterkamp, Gilian (author)In recent years wind turbines have become increasingly large to increase energy yield and cost-effectiveness. This has led to taller turbine towers, subjected to larger loads. As a result, Lagerwey turbines experience lateral tower vibrations at different resonance frequencies. These vibrations result in rotor speed measurement disturbances due...master thesis 2021
- document
-
Dorgelo, Gerjan (author)Currently, there is no infrastructure between the two Indonesian islands Flores and Adonara. The islands are separated by the Larantuka Strait, which has a width varying between 600 and 1000 meters. The local government would like a bridge between the two islands. However, as the water in the 18 meter deep strait is heavily subjected to tidal...master thesis 2020
- document
-
Hsu, Chih-gang (author)In the simulation of floating wind turbines, a traditional rigid floater assumption becomes less valid while pursuing large size floating wind turbines with steel-efficient floaters. Up to date, hull flexibility still cannot be efficiently incorporated into aero-servo-elastic-hydro simulation tools, and the possible influence of hull flexibility...master thesis 2019
- document
-
3D FE seismic analysis of a monopile-supported offshore wind turbine in a non-liqueable soil depositVĂCĂREANU, Vlad (author)This work presents a numerical study on the dynamic response of monopile-supported offshore wind turbines (OWTs) under seismic loading conditions. For this purpose the realistic design ofa 8 MW OWT is considered as ideally located in a layered, non-liqueable site off the coast of Japan. This choice allowed to employ available site...master thesis 2019
- document
-
Tang, Hilfon (author)The demand for blade installation and maintenance is increasing with each additional installed offshore wind turbine. In 2017, 560 additional turbines were installed in Europe, reaching 4149 turbines in total. Currently, they are serviced with cost and time inefficient methods, such as rope access and jack-up vessels. Rope access is slow and...master thesis 2018
- document
-
van den Bosch, Joost (author)Currently, the foundation design of offshore wind turbines is based on a simple cantilever beam model with a mass representing the rotor and nacelle, or by making use of wind turbine simulation software such as Bladed, which are built for rotor design. The simple models are unrealistic since the dynamic interaction between the aerodynamic loads,...master thesis 2017