SHIP RESISTANCE IN UNIFORM WAVES,
Abstract
Several ship models were tested in uniform waves. Motions as well as resistances were measured in more than 2,500 individual tests. The ratios of wave length to ship length of 0.75, 1.00, 1.25, and 1.50 were covered. The wave steepness was varied between 1:15 and 1:70 for each of the wave lengths. The speed range for testing was between Froude numbers of 0 and 0.35. Still water resistances were measured in separate experiments and the added resistance due to the oncoming waves derived by subtracting the stillwater resistance from the total resistance in waves. The results indicate that the added resistance depends upon the block coefficient, the speed of the ship, and the steepness of the waves. It has a maximum in the vicinity of the maximum motions and decreases again for the higher speeds. The added resistance reaches higher values per unit displacement for smaller block coefficients. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1964
- Accession Number
- AD0606276
Entities
People
- O. J. Sibul
Organizations
- University of California, Berkeley