The objective of the work was to produce model data to aid in the evaluation of the effect of different ballast displacements on seakeeping behavior of a typical 250,000 DWT tanker. A series of tests were made at three headings in long-crested irregular waves of two levels of severity. Additional parametric variations included four model displacement conditions and two speeds. Heave motions were of lower magnitude than would in general be expected. The most violent longitudinal motions occurred in bow seas. In general, the influence of ballast condition on motion magnitudes is not large. The incidence of propeller emergence appears worst in bow seas. Similarly, the effect of forward draft on keel emergence and the incidence of re-entry velocities greater than 17 ft/sec is very strong. It is apparent from the head sea relative motion results that the model was on the verge of supercritical operation in the model seas. This is important from the point of view of data interpretation and eventual design conclusions. (Author)
Seakeeping Tests of a 250000 DWT Tanker Model in Various Ballast Conditions
1973
45 pages
Report
Keine Angabe
Englisch
Initial Seakeeping Tests on an IACC Yacht Hull Model: Two Ballast Conditions
British Library Conference Proceedings | 1993
|NTIS | 1997
DataCite | 1924