ON THE WAVEMAKING RESISTANCE AND SQUAT OF A CATAMARAN MOVING AT HIGH SPEED IN A SHALLOW WATER CHANNEL
The wavemaking of a fast catamaran moving uniformly in a straight rectangular shallow water channel was theoretically investigated using the mathematical technique of matched asymptotic expansions. The far-field flow around the ship was approached by a nonlinear shallow water wave theory; near field flow, by an improved slender-body theory. The mutual hydrodynamic interaction between the two hulls was approximated by means of sectional blockage coefficients in cross-flow as well as by a suitable Kutta condition at the stern. The resulting nonlinear initial-boundary problem governed by a modified KP equation was solved by a finite- difference method. Satisfactory agreement between the calculations and measurements previously carried out in a model tank was obtained for practically relevant integral quantities such as wave resistance, sinkage and trim over a broad range of speed (0.5 Fnh 2.5). At supercritical speeds the specific wave resistance of a ship was found to be reduced significantly by using a twin hull instead of a monohull.
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Supplemental Notes:
- FAST '95, 3rd Intl Conf on Fast Sea Transportation, 25-27 Sept 1995; Lubeck-Travemunde, Germany. Procs. Ed by C.F.L. Kruppa. Publ by Schiffbautechnische Gesellschaft, Germany. Vol 2, p 1313 [13 p, 11 ref, 1 tab, 8 fig]
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Authors:
- Jian, T
- Sharma, S D
- Chen
- X-N
- Publication Date: 1995
Language
- English
Subject/Index Terms
- TRT Terms: Catamarans; Navigation; Ship motion; Wave resistance
- Uncontrolled Terms: High speed vessels; Squat
- Old TRIS Terms: Shallow water effects
- Subject Areas: Marine Transportation; Vehicles and Equipment;
Filing Info
- Accession Number: 00733485
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Mar 27 1997 12:00AM