Roll-coupling effect on ship maneuvering motions is not negligible for high speed vessels, large container ships, passenger ships etc. To perceive the roll-coupling effect on the ship maneuverability, this paper proposes new simplified formulae for course stability criterion and steady turning index in the framework of the linear motion theory. Then, an approximation is employed where the depth wise acting point of lateral force related to roll moment is constant in any oblique motion mode. To obtain the hydrodynamic derivatives, oblique towing test and circular motion test with various heel angles were conducted for models of a container ship, a pure car carrier and a ferry. In general, course stability deteriorates with increasing Froude number Fn or decreasing of metacentric height GM', whereas turning performance improves and the time until response reaches steady turning state increases.
Roll-coupling effect on ship maneuverability
Kopplungseinfluss der Rollbewegung auf die Manövrierfähigkeit von Schiffen
Ship Technology Research / Schiffstechnik ; 61 , 1 ; 16-32
2014
17 Seiten, 12 Bilder, 5 Tabellen, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
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