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dc.contributor.advisorYounis, Mohammad I.
dc.contributor.authorAlfosail, Feras
dc.date.accessioned2015-07-08T05:43:55Z
dc.date.available2016-07-07T00:00:00Z
dc.date.issued2015-07
dc.identifier.citationAlfosail, F. (2015). Analysis of the Nonlinear Static and Dynamic Behavior of Offshore Structures. KAUST Research Repository. https://doi.org/10.25781/KAUST-13386
dc.identifier.doi10.25781/KAUST-13386
dc.identifier.urihttp://hdl.handle.net/10754/559183
dc.description.abstractUnderstanding static and dynamic nonlinear behavior of pipes and risers is crucial for the design aspects in offshore engineering fields. In this work, we examine two nonlinear problems in offshore engineering field: vortex Induced vibration of straight horizontal pipes, and boundary layer static solution of inclined risers. In the first study, we analyze the effect of the internal velocity of straight horizontal pipe and obtain the vortex induced vibration forces via coupling the pipe equation of motion with the recently modified Van Der Pol oscillator governing the lift coefficient. Our numerical results are obtained for two different pipe configurations: hinged-hinged, and clamped- clamped. The results show that the internal velocity reduces the vibration and the oscillation amplitudes. Also, it is shown that the clamped-clamped pipe configuration offers a wider range of internal velocities before buckling instability occurs. The results also demonstrate the effect of the end condition on the amplitudes of vibration. In the second study, we develop a boundary layer perturbation static solution to govern and simulate the static behavior of inclined risers. In the boundary layer analysis, we take in consideration the effects of the axial stretch, applied tension, and internal velocity. Our numerical simulation results show good agreement with the exact solutions for special cases. In addition, our developed method overcomes the mathematical and numerical limitations of the previous methods used before.
dc.language.isoen
dc.subjectVortex induced Vibrations
dc.subjectVan Der Pol Oscillator
dc.subjectBoundary Layer Petrubation
dc.subjectInclined Riser
dc.subjectRiser Static Solution
dc.subjectPipe Vibratrations
dc.titleAnalysis of the Nonlinear Static and Dynamic Behavior of Offshore Structures
dc.typeThesis
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.rights.embargodate2016-07-07
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberLubineau, Gilles
dc.contributor.committeememberSamtaney, Ravi
thesis.degree.disciplineMechanical Engineering
thesis.degree.nameMaster of Science
dc.rights.accessrightsAt the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2016-07-07.
refterms.dateFOA2016-07-07T00:00:00Z


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