Reliability Research on Fatigue Life of Spots of Semi-submerged Drilling Unit

Based on the calculated results of the simplified model of deep-water semi-submerged drilling unit, the model of deep-water semi-submerged drilling unit is built by reasonably simplifying. The large vertical cylinder （MacCamy-Fuchs） formula is modified according to this model, then the modified form...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2011-04, Vol.16 (2), p.242-246
Main Authors: Yan, Yong-jian, Xu, Jin-quan
Format: Article
Language:English
Subjects:
Architecture
Computer Science
Electrical Engineering
Engineering
Life Sciences
Materials Science
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Summary:Based on the calculated results of the simplified model of deep-water semi-submerged drilling unit, the model of deep-water semi-submerged drilling unit is built by reasonably simplifying. The large vertical cylinder （MacCamy-Fuchs） formula is modified according to this model, then the modified formula is utilized to obtain the wave load spectrum which acts on the columns of the semi-submerged drilling unit. By using ANSYS software, a spectrum analysis process is established to calculate the stochastic response spectrum of the model that is subjected to the wave load spectrum which has been calculated. Then the power spectral density of stochastic response of the key nodes can be obtained. Based on the Miner model and the first excursion failure criterion, the fatigue life reliability of the key nodes is calculated.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-011-1130-7