Prediction of wave loads and motions of floating marine structures by three-dimensional flow theory

Sen, Debabrata (1983) Prediction of wave loads and motions of floating marine structures by three-dimensional flow theory. Masters thesis, Memorial University of Newfoundland.

[English] PDF (Migrated (PDF/A Conversion) from original format: (application/pdf)) - Accepted Version Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Download (15MB) [English] PDF - Accepted Version Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. (Original Version)

Abstract

The three-dimensional singularity distribution or boundary integral method has been demonstrated by many investigators to be the most versatile and reliable technique for the calculation of harmonic oscillation of a truly three-dimensional floating marine structure in potential flow field. -- In the present work, a numerical scheme is presented and a computer program has been developed based on the three-dimensional singularity distribution theory. The program calculates the first order wave exciting forces and moments, hydrodynamic co-efficients and motion responses in six degrees of freedom of any floating marine structure of arbitrary geometry for different angles of heading. Calculations are performed for a floating rectangular box, a vertical circular cylinder and a 130,000 ton dwt tanker. The results are compared with available published results based on the same theoretical model. In general, a good agreement is found between the results. -- To demonstrate the versatility and effectiveness of the program, calculations are also performed for a semi-submersible and the results are presented.

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