Master thesis : Fatigue Methodology of Floating Offshore Wind Turbine Platform & Tower in Composite Materials
Pathak, Pharindra
Promotor(s) : PETITEAU, Jean-Christophe
Date of defense : 15-Sep-2022 • Permalink : http://hdl.handle.net/2268.2/16557
Details
Title : | Master thesis : Fatigue Methodology of Floating Offshore Wind Turbine Platform & Tower in Composite Materials |
Author : | Pathak, Pharindra |
Date of defense : | 15-Sep-2022 |
Advisor(s) : | PETITEAU, Jean-Christophe |
Committee's member(s) : | Ducrozet, Guillaume
AUBRUN, Sandrine |
Language : | English |
Number of pages : | 93 |
Keywords : | [en] Composite material, SN curve, CFL Diagram, Turbine Tower, Wind Turbine, |
Discipline(s) : | Engineering, computing & technology > Mechanical engineering |
Name of the research project : | FIBREGY Project |
Target public : | Researchers Professionals of domain Student General public Other |
Institution(s) : | Université de Liège, Liège, Belgique |
Degree: | Master : ingénieur civil mécanicien, à finalité spécialisée en "Advanced Ship Design" |
Faculty: | Master thesis of the Faculté des Sciences appliquées |
Abstract
[en] The offshore wind power industry is gaining popularity for generating large
amount of electricity around the globe. In recent years, it has developed wind turbine and
floater technologies, where abundant wind resources and open sea areas are ideal for
developing wind farms. A wind turbine needs a reliable structural design to harvest
energy from surrounding environmental loads. However, it is common for offshore wind
turbines to be exposed to high dynamic loads, eventually causing fatigue in their
substructure.
To overcome the above limitation, a composite material for the wind turbine is a practical
alternative. It reduces the maintenance and upkeep costs associated with the steel
offshore. It also reduces the tower mass and, the support mass. In this master thesis,
methodology for the fatigue assessment of a composite wind turbine tower that can be
used on a floating offshore platform has been discussed and finite element models are
developed. Additionally, different dynamic analyses and finite element routines are
incorporated into the design process of the turbine tower model.
The thesis report has presented the fatigue methodology for the Floating Offshore Wind
Power Platform and Turbine Tower in Composite Materials. First, it explains why fatigue
life modelling methods for metals and alloys, already developed and validated, cannot be
directly applied to composites. Hence, to develop an efficient fatigue model for composite
materials, it is imperative to understand the specific mechanisms that cause the damage
to a composite material under fatigue and static loading. Next, a particular emphasis has
been placed on designing and developing turbine towers using composite materials. The
model developed has been run under different load conditions. The repetitive
environment load is analysed using BV's in-house software OPERA to evaluate global
structural response. At last, the SN curves and CFL diagrams have been used to figure
out fatigue life damage using the python script.
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