Show simple item record

dc.contributor.advisorKim, Cheung H.en_US
dc.creatorKim, Nungsooen_US
dc.date.accessioned2006-04-12T16:04:02Z
dc.date.available2006-04-12T16:04:02Z
dc.date.created2004-12en_US
dc.date.issued2006-04-12
dc.identifier.urihttp://hdl.handle.net/1969.1/3183
dc.description.abstractThis study presents the results of an extraction of the 2nd-order nonlinear responses from model test data. Emphasis is given on the effects of assumptions made for the Gaussian and non-Gaussian input on the estimation of the 2nd-order response, employing the quadratic Volterra model. The effects of sea severity and data length on the estimation of response are also investigated at the same time. The data sets used in this study are surge forces on a fixed barge, a surge motion of a compliant mini TLP (Tension Leg Platform), and surge forces on a fixed and truncated column. Sea states are used from rough sea (Hs=3m) to high sea (Hs=9m) for a barge case, very rough sea (Hs=3.9m) for a mini TLP, and phenomenal sea (Hs=15m) for a truncated column. After the estimation of the response functions, the outputs are reconstructed and the 2nd order nonlinear responses are extracted with all the QTF distributed in the entire bifrequency domain. The reconstituted time series are compared with the experiment in both the time and frequency domains. For the effects of data length on the estimation of the response functions, 3, 15, and 40- hour data were investigated for a barge, but 3-hour data was used for a mini TLP and a fixed and truncated column due to lack of long data. The effects of sea severity on the estimation of the response functions are found in both methods. The non-Gaussian method for estimation is more affected by data length than the Gaussian method.en_US
dc.format.extent5832781 bytes
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherTexas A&M Universityen_US
dc.subjectQuadratic Volterra Modelen_US
dc.subjectSea severityen_US
dc.subjectData lengthen_US
dc.subjectGaussian and non-Gaussian inputen_US
dc.subjectNonlinear Responseen_US
dc.subjectTLPen_US
dc.titleExtraction of the second-order nonlinear response from model test data in random seas and comparison of the Gaussian and non-Gaussian modelsen_US
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentCivil Engineeringen_US
thesis.degree.disciplineOcean Engineeringen_US
thesis.degree.grantorTexas A&M Universityen_US
thesis.degree.nameDoctor of Philosophyen_US
thesis.degree.levelDoctoralen_US
dc.contributor.committeeMemberPowers, E.en_US
dc.contributor.committeeMemberNewton, H.J.en_US
dc.contributor.committeeMemberKim, M.en_US
dc.type.genreElectronic Dissertationen_US
dc.type.materialtexten_US
dc.format.digitalOriginborn digitalen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record