Influence of advanced load simulation models on fatigue design of jackets for offshore wind turbines.

Radulovic, Luka (2013) Influence of advanced load simulation models on fatigue design of jackets for offshore wind turbines. [Laurea magistrale], Università di Bologna, Corso di Studio in Civil engineering [LM-DM270], Documento ad accesso riservato.
Documenti full-text disponibili:
[img] Documento PDF
Full-text accessibile solo agli utenti istituzionali dell'Ateneo

Download (3MB) | Contatta l'autore


Constant developments in the field of offshore wind energy have increased the range of water depths at which wind farms are planned to be installed. Therefore, in addition to monopile support structures suitable in shallow waters (up to 30 m), different types of support structures, able to withstand severe sea conditions at the greater water depths, have been developed. For water depths above 30 m, the jacket is one of the preferred support types. Jacket represents a lightweight support structure, which, in combination with complex nature of environmental loads, is prone to highly dynamic behavior. As a consequence, high stresses with great variability in time can be observed in all structural members. The highest concentration of stresses occurs in joints due to their nature (structural discontinuities) and due to the existence of notches along the welds present in the joints. This makes them the weakest elements of the jacket in terms of fatigue. In the numerical modeling of jackets for offshore wind turbines, a reduction of local stresses at the chord-brace joints, and consequently an optimization of the model, can be achieved by implementing joint flexibility in the chord-brace joints. Therefore, in this work, the influence of joint flexibility on the fatigue damage in chord-brace joints of a numerical jacket model, subjected to advanced load simulations, is studied.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Radulovic, Luka
Relatore della tesi
Corso di studio
Curriculum: Structural engineering
Ordinamento Cds
Parole chiave
Fatigue jacket offshore wind turbine
Data di discussione della Tesi
18 Dicembre 2013

Altri metadati

Statistica sui download

Gestione del documento: Visualizza il documento