斜波中航走時の船速低下に関する一考察

概要

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Prediction method of speed drop in oblique waves is discussed. Added resistance in those waves is assumed to be estimated as a summation of three components due to motion, lateral drifting and mean rudder angle. Speed drop is calculated by the same method as in head waves using this added resistance. The validity of this method is confirmed by comparison with self-propulsion test results of a container and a tanker model. Drifting angle and mean rudder angle required in the above are calculated by use of equilibrium equations derived from equation of manoeuvring motion, where wave drifting forces are considered to be steady external force. Calculated results favorably agree with self-propulsion test results.
1991-03-29