SOURCE DISTRIBUTION METHOD AND HYDRODYNAMICS COEFFICIENTS OF VESSEL
Keywords:
Time Domain Ship Simulation, Curved Triangular Boundary Element, Source Distribution Method, Discretization of Element, Green's Function, Singular Integration Method.Abstract
In the present research, fix structure and floating structure such as vessel are studied in terms of hydrodynamics forces and hydrodynamics coefficients. Currently, three-dimensional source
distribution method is adopted which taking into account the actual design affix; structure as well as hull form. A curved triangular boundary element is implemented with constant source
dist ribution on each element. Some improvements are adop ted in order to solve the singular
integ ration of elements. Gauss-type Laguerre integration as well as cauchy principal value are
implemented to solve the Green function numerically. These modification show some
improvement of accuracy according to number of panels. Experimental result of Greek passenger ship is compared with present resu lt as well as Frank Close-Fit Method.
References
Wehausen, J.V. and Laitone, E.V. 1960, Surface waves, Encyclopedia of Physics, Vol. 9, Springer-Verlag, Berlin.
Bratanow, T. Spehert, T & Brebbia, C.A., 1978 . Three-Dimensional Analysis of Flows Around Ship Hulls Using Boundary Elements, Recent Advances in Boundary Element Methods, Pentech Press, Plymouth, London.
Reddy C.T. and Shippy DJ. 1981, Alternative Integration Formulae for Triangular Elements, Int. J. Numer. Methods in Eng. vol. 17.
Rangogni, R., 1989, Analytical Integration of the Fundamental Solution lIR Over Panel Boundary Element, Advances in Boundary Elements, Vol.l: Computations and Fundamentals, Computational Mechanics Publications, Southampton Boston, U.S.
Garrison, C. J., 1978, Hydrodynamic loading of large offshore structures, three-dimensional source distribution methods, Numerical Methods in Offshore Engineering, Wiley, London, pp. 87-140.
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