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Memorial University - Electronic Theses and Dissertations 1
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Document Description
TitleGuyed tower response to irregular waves considering linear and nonlinear mooring cables
AuthorWishahy, Momen Abdel-Magid, 1955-
DescriptionThesis (M.Eng.) -- Memorial University of Newfoundland, 1983. Engineering and Applied Science
Date1982
Paginationxi, 63 leaves : ill.
SubjectOffshore structures;
DegreeM.Eng.
Degree GrantorMemorial University of Newfoundland. Faculty of Engineering and Applied Science
DisciplineEngineering and Applied Science
LanguageEng
NotesBibliography : leaves 35-37.
AbstractThe study presents the dynamic analysis procedure for predicting the guyed tower response to irregular waves. Hydrodynamic interaction is taken into account by the added water mass concept and the fundamental frequencies are determined using i) a lumped parameter two dimensional beam model and ii) three dimensional truss finite element model. Effect of the mooring guylines is simulated using one dimensional boundary elements. The example structure analyzed is the Exxon test guyed tower erected in 89.3 m deep water in the Gulf of Mexico. The measured wave height-time history reported by Exxon is used to determine the wave forces. Irregular wave forces are computed using linearized Morison's equation. The nonlinearlity of the mooring system is considered using NONSAP finite element program. The tower response in terms of offset-time history to wave forces is determined for both linear and nonlinear cable behaviour. Numerical results obtained in this investigation are within the maximum values accepted by current design criteria. The computed frequencies and the responses agree reasonably well with the available measured values.
TypeText
Resource TypeElectronic thesis or dissertation
FormatImage/jpeg; Application/pdf
SourcePaper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier75251323
RightsThe author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
CollectionElectronic Theses and Dissertations
Scanning StatusCompleted
PDF File(32.98 MB) -- http://collections.mun.ca/PDFs/theses/Wishahy_MomenAndel-MagidAhmed.pdf
CONTENTdm file name298532.cpd