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Seismic analysis of nonlinear offshore moored floating structures
Wang, Kun; Er, Guo-Kang; Iu, Vai Pan
2018-07
Source PublicationADVANCES IN STRUCTURAL ENGINEERING
ISSN1369-4332
Volume21Issue:9Pages:1361-1375
AbstractThis article presents a numerical model for solving the nonlinear random vibrations of offshore moored floating structures under seismic excitation. The offshore moored floating structure consists of the floating platform and mooring cables. The floating platform is considered as a rigid body with 3 degrees of freedom. The nonlinear equations of motions of the mooring cables are established using the nonlinear cable elements that are formulated based on the extended Hamilton principle. The nonlinear hydrodynamic drag forces that act on both the floating platform and cables are considered. In order to carry out the random vibrational analysis, the connection conditions between the floating structure and mooring cables are given to formulate the equations of motions of the whole system. Finally, the moored floating structure under horizontal seismic ground accelerations with Kanai-Tajimi model are analyzed using Monte Carlo simulation method. The probability density functions of the displacements of the moored floating structure and the maximum tensile force in cables are presented. The influences of different sag-to-span ratios or inclined angles of the mooring cables on the mean value and standard deviation of the displacements of the floating structure and the maximum tensile force in cables are analyzed.
Keywordcable element connection conditions moored floating structure random vibration seismic ground motion
DOI10.1177/1369433217744356
URLView the original
Indexed BySCI
Language英语
WOS Research AreaConstruction & Building Technology ; Engineering
WOS SubjectConstruction & Building Technology ; Engineering, Civil
WOS IDWOS:000438552100009
PublisherSAGE PUBLICATIONS INC
The Source to ArticleWOS
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Citation statistics
Document TypeJournal article
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Wang, Kun,Er, Guo-Kang,Iu, Vai Pan. Seismic analysis of nonlinear offshore moored floating structures[J]. ADVANCES IN STRUCTURAL ENGINEERING,2018,21(9):1361-1375.
APA Wang, Kun,Er, Guo-Kang,&Iu, Vai Pan.(2018).Seismic analysis of nonlinear offshore moored floating structures.ADVANCES IN STRUCTURAL ENGINEERING,21(9),1361-1375.
MLA Wang, Kun,et al."Seismic analysis of nonlinear offshore moored floating structures".ADVANCES IN STRUCTURAL ENGINEERING 21.9(2018):1361-1375.
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