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Accession Number ADA563337
Title TriSWACH Small Model Testing.
Publication Date Aug 2011
Media Count 38p
Personal Author A. Harrington J. D. Wells
Abstract The ACCeSS community is interested in understanding the capabilities of the Trimaran-Small Water Plane Area Center Hull (TriSWACH) ship concept and the future use of this concept for the United States Navy. The aim of this project was to conduct resistance, sinkage, trim, and seakeeping tests for a variety of sidehull configurations on the TriSWACH model constructed at Webb Institute, in the Naval Academy's 120ft tow tank facility. Calm water and limited regular wave testing was previously completed at Webb institute and Steven's Institute of Technology, but irregular wave tests had not been performed. This project conducted calm water resistance tests for selected sidehull locations, varied transversely and longitudinally, to correlate with data from previous testing at Webb Institute. To gather the data necessary to study the effects of interference between the hulls, the centerhull and the sidehulls were tested separately. To observe the effect of splayed sidehulls, calm water resistance tests were conducted with the sidehulls splayed 0.5 and 1.5 degrees outboard. Calm water resistance tests were also conducted using sidehulls with double the displacement of the original sidehulls. Regular wave tests at Froude no. 0.3-0.5 and irregular wave tests in sea state 4-5 were completed for selected sidehull configurations. The tow tank data collected can validate CFD hull form optimization tools as well as support powering predictions for the TriSWACH design.
Keywords Configurations
Model basins
Model tests
Sea states
Ship hulls
Test and evaluation
Test methods
Triswach(Trimaran-small water plane area centerhull)
United states naval academy

Source Agency Non Paid ADAS
NTIS Subject Category 47A - Marine Engineering
94K - Laboratory & Test Facility Design & Operation
Corporate Author Naval Surface Warfare Center Carderock Div., West Bethesda, MD.
Document Type Technical report
Title Note Final rept. 23 May-5 Aug 2011.
NTIS Issue Number 1226
Contract Number N/A

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