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Effect of fatigue on the structural response of complex joint for offshore structures

Fatigue in offshore structures is caused by the cumulative effect of variable environmental loads experienced by the structure during its life. Both the global loading on the structure and the local loading on individual members contribute to fatigue damage. Fatigue damage is a highly localized phen...

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Main Author: Chow, Wan Han
Format: Thesis
Language:English
Published: 2008
Online Access:http://psasir.upm.edu.my/id/eprint/51069/1/FK%202008%20108RR.pdf
http://psasir.upm.edu.my/id/eprint/51069/
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spelling my.upm.eprints.510692017-03-31T02:07:27Z http://psasir.upm.edu.my/id/eprint/51069/ Effect of fatigue on the structural response of complex joint for offshore structures Chow, Wan Han Fatigue in offshore structures is caused by the cumulative effect of variable environmental loads experienced by the structure during its life. Both the global loading on the structure and the local loading on individual members contribute to fatigue damage. Fatigue damage is a highly localized phenomenon affected by local details in the structure. Fatigue failure occurs under repeated cycles of relatively low stress levels due to the growth of the internal cracks. Fatigue analysis is normally perform on jacket (steel framed tubular structure connected to the sea bed by piles which are driven through piles on the outer members of the jacket) subjected to repetitive wave loading. However for this project, emphasis is placed on evaluation of fatigue damage on a semisubmersible topsides (steel framed structure above the mean sea level) subjected to inertia loads resulting from wave loads. This project will focus on the classical method of fatigue analysis as well as the simplified fatigue analysis method. This project is mainly concerned with the fatigue damage experienced by the topsides complex joint subjected to inertia loads under the calm condition, extreme storm condition and damage storm condition. The main objectives are to demonstrate the applicability of using a simplified fatigue analysis spreadsheet in estimating the fatigue life of the complex joint. Besides that, calculation of hot spot stress by Finite Element Analysis and fatigue calculation based on Stress Concentration Factor (SCF) and S-N Curve is being performed. The fatigue remedy action and recommendations will also be addressed and discussed. 2008-05 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/51069/1/FK%202008%20108RR.pdf Chow, Wan Han (2008) Effect of fatigue on the structural response of complex joint for offshore structures. Masters thesis, Universiti Putra Malaysia.
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Fatigue in offshore structures is caused by the cumulative effect of variable environmental loads experienced by the structure during its life. Both the global loading on the structure and the local loading on individual members contribute to fatigue damage. Fatigue damage is a highly localized phenomenon affected by local details in the structure. Fatigue failure occurs under repeated cycles of relatively low stress levels due to the growth of the internal cracks. Fatigue analysis is normally perform on jacket (steel framed tubular structure connected to the sea bed by piles which are driven through piles on the outer members of the jacket) subjected to repetitive wave loading. However for this project, emphasis is placed on evaluation of fatigue damage on a semisubmersible topsides (steel framed structure above the mean sea level) subjected to inertia loads resulting from wave loads. This project will focus on the classical method of fatigue analysis as well as the simplified fatigue analysis method. This project is mainly concerned with the fatigue damage experienced by the topsides complex joint subjected to inertia loads under the calm condition, extreme storm condition and damage storm condition. The main objectives are to demonstrate the applicability of using a simplified fatigue analysis spreadsheet in estimating the fatigue life of the complex joint. Besides that, calculation of hot spot stress by Finite Element Analysis and fatigue calculation based on Stress Concentration Factor (SCF) and S-N Curve is being performed. The fatigue remedy action and recommendations will also be addressed and discussed.
format Thesis
author Chow, Wan Han
spellingShingle Chow, Wan Han
Effect of fatigue on the structural response of complex joint for offshore structures
author_facet Chow, Wan Han
author_sort Chow, Wan Han
title Effect of fatigue on the structural response of complex joint for offshore structures
title_short Effect of fatigue on the structural response of complex joint for offshore structures
title_full Effect of fatigue on the structural response of complex joint for offshore structures
title_fullStr Effect of fatigue on the structural response of complex joint for offshore structures
title_full_unstemmed Effect of fatigue on the structural response of complex joint for offshore structures
title_sort effect of fatigue on the structural response of complex joint for offshore structures
publishDate 2008
url http://psasir.upm.edu.my/id/eprint/51069/1/FK%202008%20108RR.pdf
http://psasir.upm.edu.my/id/eprint/51069/
_version_ 1643834848962412544
score 13.211869

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