CFD Analysis into the Correlation between Resistance and Seakeeping of Trimaran Configuration

Abstract

The development of marine transportation is growing rapidly to fulfil human needs. Furthermore, the use of trimaran vessels desperately needs to be developed to transport human and goods. The use of trimaran is very advantageous because it has large deck area compared to monohull with similar displacement. The calculation of trimaran vessel resistance with variations in the distance of the main hull and side hull transversely using Computational Fluid Dynamic approach was carried out. Then, seakeeping analysis is done to obtain the ship motion. Both resistance and seakeeping calculations were analyzed for resistance and seakeeping correlation. The results of numerical studies indicate that there is unique interference resistance in trimaran hull to transverse distance between hulls. The smaller distance between trimaran hulls, the greater resistance caused by interference of the constraints components that occur. Then, the apparent correlation between resistance and seakeeping is the increasing interference that causes heave and pitch motion to decrease. Interference does not affect roll motion. The numerical analysis shows that at a distance between hulls transversely 0.4 shows excellent results for the performance of resistance and seakeeping.