UM
Nonlinear vibrations of offshore floating structures moored by cables
Wang, Kun; Er, Guo-Kang; Iu, Vai Pan
2018-05-15
Source PublicationOCEAN ENGINEERING
ISSN0029-8018
Volume156Pages:479-488
AbstractIn this study, a numerical model is presented for the nonlinear vibrational analysis in the symmetrical plane of the rectangular offshore floating structures moored by cables. The upper end of each mooring cable is connected to the floating structure and the other end is fixed to the sea bed. The nonlinear equations of motions of the mooring cables are derived by using nonlinear cable elements that are formulated based on the extended Hamilton principle. The floating platform is modeled as a rigid body with three degrees of freedom. The forces applied on the floating structure and cables are analyzed, formulated and expressed in details. The connection conditions between the floating structure and mooring cables are introduced to formulate the equations of motions of the system as a whole. The vibrations of the floating structure under horizontal sinusoidal excitation are analyzed numerically. The influence of different sag-to-span ratios or inclined angles of the mooring cables, and that of different current velocities on the displacements of the floating structure and maximum tensile force in the cables are studied. The displacement amplitudes of the moored floating structure and maximum cable tensile force under different current velocities are also studied for different excitation frequencies.
KeywordNonlinear Offshore floating structures Mooring cable Connection conditions
DOI10.1016/j.ocesneng.2018.03.023
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Oceanography
WOS SubjectEngineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography
WOS IDWOS:000433269100038
PublisherPERGAMON-ELSEVIER SCIENCE LTD
The Source to ArticleWOS
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Wang, Kun,Er, Guo-Kang,Iu, Vai Pan. Nonlinear vibrations of offshore floating structures moored by cables[J]. OCEAN ENGINEERING,2018,156:479-488.
APA Wang, Kun,Er, Guo-Kang,&Iu, Vai Pan.(2018).Nonlinear vibrations of offshore floating structures moored by cables.OCEAN ENGINEERING,156,479-488.
MLA Wang, Kun,et al."Nonlinear vibrations of offshore floating structures moored by cables".OCEAN ENGINEERING 156(2018):479-488.
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