Preliminary communication
Estimation of Added Resistance of a Ship in Regular Waves
Dunja Matulja
; Faculty of Engineering Rijeka, Croatia
Marco Sportelli
; Instituto Superior Tecnico, Lisbon, Portugal
Carlos Guedes Soares
; Instituto Superior Tecnico, Lisbon, Portugal
Jasna Prpić-Oršić
; Faculty of Engineering Rijeka, Croatia
Abstract
Two methods of added resistance calculation are briefl y presented, one developed by Faltinsen, and the other by Salvesen. Both are based on the Salvesen, Tuck and Faltinsen linear strip theory, as they use it to defi ne the wave induced motions. The fi rst one obtains the added resistance by direct pressure integration, while the second one involves the potential fl ow solution. Also, as a third method, an empirical approximation of the Salvesen method for the short wave lengths
region is included. The calculations of added resistance due to waves were performed according to the chosen methods for four different ships: two containerships, a bulk carrier and a ro-ro vessel. The results
are presented graphically, with the comparison to experimental results for the available cases.
Keywords
added resistance,; motion of a ship in waves; speed loss
Hrčak ID:
72272
URI
Publication date:
30.9.2011.
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