Accession Number:

AD0606276

Title:

SHIP RESISTANCE IN UNIFORM WAVES,

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s):

Report Date:

1964-01-01

Pagination or Media Count:

64.0

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 115 and 170 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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE