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The Radiation Damping Coefficients for Surge, Heave and Pitch Motion in Free Surface

[+] Author Affiliations
Jong-Hyun Lee, Atilla Incecik

Newcastle University, Newcastle upon Tyne, UK

Paper No. OMAE2007-29218, pp. 457-464; 8 pages
  • ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering
  • Volume 4: Materials Technology; Ocean Engineering
  • San Diego, California, USA, June 10–15, 2007
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 0-7918-4270-3 | eISBN: 0-7918-3799-8
  • Copyright © 2007 by ASME


In order to predict the ship motion in a seaway, we need to determine the wave excitation forces and hydrodynamic coefficients. Currently many commercial programs based on various numerical procedures are used to predict the hydrodynamic coefficients. However special knowledge and skills for accurate modeling are required to be able to use commercial programs. Also in addition, the run time is rather excessive. This paper shows a simplified analytical procedure to predict the hydrodynamic radiation damping coefficients. In the formulation of the wave damping force due to oscillatory rigid-body motion, the use of wave radiation component with wave pattern analysis and of the two-dimensional motion energy conservation principle are made. In this paper, a procedure will be described to predict the motions of a barge geometry in time domain. At the initial stage of the development, a rectangular barge form was used and the model developed is based on strip theory. Numerical results for the radiation damping coefficients are presented and compared with the results of experiments obtained by Vughts.

Copyright © 2007 by ASME



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