Location of ship rolling axis

• Autorzy: Balcer L.
• Języki publikacji: EN

Abstrakty

EN

In the paper is presented a definition of ship rolling axis and a method for determination of location of the axis. Location of rolling axis depends not only on ship mass distribution but also on the so-called "added masses" which are equivalents of the hydrodynamic forces acting on ship hull during its motion. It has been assumed that the rolling axis is fixed with respect to ship's hull, and its location is determined with accounting for the added masses accompanying ship rolling, whereas the influence of damping forces is neglected. For a representative group of ships appropriate coefficients of hydrodynamic forces were calculated on the basis of the experimental test results available in the subject-matter literatuŹre. It has been assumed that the rolling axis passes through a common centre of ship's mass and relevant added masses. As a result proposed are simple approximate formulas which make it possible to calculate location of ship rolling axis on the basis of the typical ship data available at the preliminary design stage.

Słowa kluczowe

EN

ship seaworthiness; ship safety; ship hydromechanics; stability of floating units

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2004
• Tom: nr 1
• Strony: 3--7
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Balcer L.

• Gdańsk University of Technology,

Bibliografia

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• 2. Bruce L. Hutchison: The Transverse Piane Motions of Ships. Marine Technology, Vol.28, No.2, March 1991
• 3. Dudziak J. : Theory of ship (in Polish). Wydawnictwo Morskie. Gdańsk, 1988
• 4. Frąckowiak M., Pawłowski M. : Exercises in ship hydrodynamics (in Polish). Technical University of Gdańsk. Gdańsk, 1978
• 5. Korvin-Kroukovsky B.V. : Theory of Seakeeping. SNAME. New York, 1961
• 6. Siemionow-Tian-Szanskij W. W., Blagowieszczenskij S. N., Holodin A. N. : Ship motions at sea (in Russian). Sudostrojenie. Leningrad, 1969
• 7. Vossers G. : Resistance, Propulsion and Steering of Ships, „C" Behaviour of Ship in Waves. The Technical Publishing Company H. Stam N.V.. Antwerp-Cologne, 1962
• 8. Vugts J. H. : The hydrodynamic Coefficients for Swaying, Heaving and Rolling Cylinders in a Free Surface. International Shipbuilding Progrcss,Vol. 15, No. 167, 1968