Fatigue & Reliability Analysis of Offshore Wind Turbine Structure
Date Issued
2015
Date
2015
Author(s)
Vuong, Nguyen Van
Abstract
For offshore fixed wind turbine, stronger foundation like jacket structure has a good applicability for deeper water depth. Some recent studies have shown that offshore wind turbine with jacket support structure is a sensible choice for transitional depth ranged from 30m to 50m and a perfect replacement for monopile form because of a number of reasons as economic issue and resisting external loads better. The objective of this study is to conduct the reliability analysis of an offshore wind turbine system. The jacket support structure used in this study was transformed to an equivalent monopile form and simultaneously moved on shallow water depth. The lumped mass model is used to calculate fatigue life of each component. The lumped mass method is to obtain the mass at each mass level and the coupled transverse and rotational springs connected directly with mass level at base will be adopted to compute structural response. System reliability for the whole offshore wind turbine system based on the level 2 reliability theory is considered to estimate the system reliability under earthquake loading, wind-induced wave loads as well as the wind loading on the turbine structure.
Subjects
Offshore wind turbine
Jacket support structure
Reliability analysis
Fatigue life
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R02521266-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):e7d09cb446d00dba00aa2978b4e221d7