Results are presented form a fundamental research effort directed to identification and minimization of energy losses related to ship steering. The paper attempts to evaluate the energy losses related to yawing and rudder activity of ships during open-seas course-keeping in deep water. Two different representative tankers and one containership are examined, namely tankers of 250,000 and 400,000 DWT, and an 880 ft (268 m) long containership, using hydrodynamic data resulting from captive model tests. The approach presented involves frequency domain analyses and time domain computer simulation studies of the yaw-sway-surge-rudder coupled motions of the ships. Evaluation of losses due to both yawing of the uncontrolled ship and those resulting from yawing and rudder effects in the automatically steered case are made. On the basis of the results presented it is shown that under the action of waves yawing of an uncontrolled ship results in significant energy losses. (Wassmann)
Energy losses related to automatic steering of ships: Their evaluation and minimization
Von der automatischen Schiffssteuerung verursachte Energieverluste: Ihre Ermittlung und Minimierung
ASME-Papers ; 1-19
1981
19 Seiten, 25 Bilder, 6 Tabellen, 42 Quellen
Aufsatz (Konferenz)
Englisch
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