Print Email Facebook Twitter Mitigating ice-induced offshore wind turbine vibrations utilizing a TMD system Title Mitigating ice-induced offshore wind turbine vibrations utilizing a TMD system Author Tan, Hong (TU Delft Mechanical, Maritime and Materials Engineering) Contributor Hendrikse, H. (mentor) Hoving, J.S. (mentor) Metrikine, A. (graduation committee) Pisano, F. (graduation committee) Degree granting institution Delft University of Technology Programme Offshore and Dredging Engineering Date 2017-07-28 Abstract Offshore wind farms in Bohai Bay may be exposed to sea ice. The possible development of ice-induced vibrations can result in periodic high amplitude oscillations of the structure, which can significantly contribute to the fatigue of the structure. The main objective of this thesis is to investigate the mitigation effects of ice-induced vibrations by means of a tuned mass damper device. To achieve this goal, the ice-induced vibrations on the monopile type offshore wind structure has been analyzed numerically.On the basis of environmental data, the structure is first designed and numerically modeled. Then, an ice-crushing model has been implemented for the simulation of ice-induced vibrations on the monopile. It has been found that when the ice speed is intermediate, depends on different wind speeds, the frequency lock-in can be developed in both the first mode and second mode of the structure.The TMD model has been applied for investigating the mitigation effects. The model predicts that the TMD device can significantly mitigate the ice-induced vibration by absorbing the energy of the structure, and 1.5% tuned mass ratio is shown to be a suitable value for the investigated structure. Subject Offshore wind turbineIce-induced vibrationsTuned mass damper (TMD) To reference this document use: http://resolver.tudelft.nl/uuid:50b64856-5e4c-4f9c-9acb-3c46433db8f8 Part of collection Student theses Document type master thesis Rights © 2017 Hong Tan Files PDF Mitigating_ice_induced_of ... ng_Tan.pdf 3.89 MB Close viewer /islandora/object/uuid:50b64856-5e4c-4f9c-9acb-3c46433db8f8/datastream/OBJ/view