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Lookup NU author(s): Xutian Xue, Dr Nianzhong Chen
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© 2017 Taylor & Francis Group, London. Both Palmgren-Miner’s rule and fracture mechanics based fatigue analyses are conducted for homogeneous-material mooring lines of a semi-submersible operating at Offshore West Africa (OWA). The frequency-domain analysis is performed to calculate low frequency and wave frequency tensions for different locations of mooring lines. Narrow-banded spectrum method is applied to combine low frequency and wave frequency mooring line loadings. Fatigue damage of each mooring line is estimated by Palmgren-Miner’s rule and fracture mechanics based approaches, respectively. The comparison of fatigue lives of mooring lines predicted by Palmgren-Miner’s rule and fracture mechanics based approaches shows that results calculated by these two types of methods are generally comparable. It also shows that the top end of mooring line laying on the sea floor is the most critical point prone to fatigue failure in a taut mooring system. In addition, fatigue lives of mooring lines estimated by S-N curves offered by DNV codes are longer than those estimated by T-N curves from API codes.
Author(s): Xue X, Chen N-Z
Editor(s): Carlos Guedes Soares and Y. Garbatov
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: Progress in the Analysis and Design of Marine Structures: Proceedings of the 6th International Conference on Marine Structures (MARSTRUCT 2017)
Year of Conference: 2017
Pages: 395-404
Online publication date: 24/04/2017
Acceptance date: 02/04/2016
Publisher: CRC Press/Balkema
URL: https://doi.org/10.1201/9781315157368-46
DOI: 10.1201/9781315157368-46
Library holdings: Search Newcastle University Library for this item
ISBN: 9781138069077
