The thesis shall be submitted in 3 copies:
Work from other sources shall be properly referenced using an acknowledged referencing system. The original contribution of the candidate and material taken from other sources shall be clearly defined. Overruns shall be reported to the supervisor. The plan should include a budget for the use of computer and laboratory resources which will be charged to the department. The supervisor may require that the candidate, in an early stage of the work, presents a written plan for the completion of the work. All figures, tables and equations shall be numbered. The thesis shall contain the following elements: A text defining the scope, preface, list of contents, summary, main body of thesis, conclusions with recommendations for further work, list of symbols and acronyms, references and (optional) appendices. The text should be brief and to the point, with a clear language. The thesis should be organised in a rational manner to give a clear exposition of results, assessments, and conclusions. The candidate should utilise the existing possibilities for obtaining relevant literature. Theories and conclusions should be based on mathematical derivations and/or logic reasoning identifying the various steps in the deduction. In the thesis the candidate shall present his personal contribution to the resolution of problems within the scope of the thesis work. Subject to approval from the supervisor, topics may be deleted from the list above or reduced in extent. The work scope may prove to be larger than initially anticipated.
#Orcaflex coordinate system software#
Compare results obtained from the OrcaFlex analyses to model test results and preferably also other software tools. The mooring lines can be modeled as Morison elements.Ĥ. For the hull this includes the determination of: (i)Frequency and direction dependent first and second order wave excitation coefficients (ii)Frequency dependent added mass and potential damping (iii)Viscous and eddy-making damping. Run coupled time domain analyses of the moored Sevan FSU subjected to several environmental conditions using OrcaFlex. Give an overview of the theoretical background for the dynamic response of a moored floater to the combined loading due to wind, waves and current.ģ. Give a brief description of the model test for which results were used for comparison with the numerical analyses to be performed as part of the present thesis. The following subjects are to be addressed as part of this work:ġ.
The results presented in that report are the basis for comparison with the OrcaFlex numerical analyses to be performed as part of the present work. A report containing information from a model test conducted on a moored Sevan Floating Storage Unit has been made available for the present master thesis work. The topic of this thesis was initially proposed by 4Subsea, whose main interest was related to OrcaFlex and low frequency motion of moored floaters. Coupled analyses are also the recommended numerical approach in order to predict the low frequency motion of moored structures (Veritas). In this context, a coupled analysis can be utilized in collaboration with a truncated model test.
#Orcaflex coordinate system verification#
The existing laboratories used for design verification of moored vessels are challenged by the water depth increase due to scaling laws. Offshore activity is taking place at increasing water depths, and in order to predict the system motion of response these loads must be adequately modeled. The aim of a coupled analysis is to determine the floater’s mean position and dynamic response due to the mooring and riser system’s restoring, damping and inertia forces. Erik Byholt HanssenĬoupled analysis of a moored Sevan hull by the use of OrcaFlex Koblet responsanalyse av en forankret Sevan flyter ved bruk av OrcaFlex A coupled analysis is recognized by the dynamics of the floater, mooring lines and risers being solved simultaneously. NTNU - Norwegian University of Science and Technology - Department of Marine Technology Norwegian University of Science and Technology Department of Marine Technology Subsea Technology Submission date: June 2013 Supervisor: Bernt Johan Leira, IMT Coupled Analysis of a Moored Sevan Hull by the use of OrcaFlex
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