Service margin - solution of the problem or a problem waiting for solution?

• Autorzy: Stasiak J.
• Języki publikacji: PL

Abstrakty

EN

Subiect of the paper is the problem of predicting sea-going ship resistance and/or horsepower in real operating conditions. Attention is drawn first of all to the need and possibility of revising the very much outdated but still used "service margin" method, which consists in adding an arbitrary percentage margin to the value of resistance or horsepower, relatively precisely determined for the calm water conditions. A negative impact in this respect is shown of the generally used delivery-acceptance procedures, where particular importance is attached to the ship propulsion tests on the "measured mile". The need of revising the "service margins" is a consequence of an obvious need for most efficient ships from the technical as well as economic point of view. Secondly, it is a "must" of permanent improving the ship design quality - the adequacy and accuracy of design methods. The work presents the "wave service margin" coefficient models. It is assumed that they may contribute to the necessary rationalization of the procedure of real ship resistance and/or horsepower determination. The work is based on the results of resistance tests of a series of ships designed within the Baltecologicalship project. The tests were carried out in the Chair of Ship Theory and Design of the Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology.

Słowa kluczowe

EN

sea-going ship; design; seagoing qualities; resistance; main propulsion horsepower; service margins

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2004
• Tom: S 1
• Strony: 29--33
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Stasiak J.

• Gdańsk University of Technology

Bibliografia

• 1. Aertssen G.. Sluys M.F.: Service Performance and Seukeeping Trials on Large Container ship. Naval Architect, October 1972
• 2. Levine H., Hawkins S.: Comments on Service Margin for Ships. SNAME. Technical and Research Rep. 1970
• 3. Zubaly R.B.: Causes and Extent of Lost Time at Sea for Dry Cargo Ship. SNAME. Technical and Research Rep. 1969.
• 4. Hogben N., Dacunha N.M.C., Olliver G.F. : Global Wave Statistics. BMT 1986
• 5. Brzoska E. et al.: Still water resistance model tests and propulsion prediction of the SINE 202 container carrier (in Polish). Faculty of Ocean Engineering and Ship Technology. Gdańsk University of Technology. Gdańsk, 2003
• 6. Brzoska E. et al.: Resistance, in waves prediction of the SINE 202 container carrier (in Polish). Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology. Gdańsk, 2003
• 7. Brzoska E. et al.: Resistance model tests and propulsion prediction of the SINE 203 tanker in still water and in waves (in Polish). Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology. Gdańsk, 2003
• 8. Brzoska E. et al.: Resistance model tests and propulsion prediction of the SINE 204 Ro-Ro ship in still water and in waves (in Polish). Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology. Gdańsk, 2003