Study on the Longitudinal Motion of Small-Waterplane-Area Twin-Hull Ships

Abstract

Small Waterplane-Area Twin-Hull Shlp is superior to conventional ships from a viewpoint of wave making resistance and seakeeping characteristics, so it is given attention as one of the new type of ships. Recently, two types of SWATH have been investigated, one is single strut type and the other twin struts type. In this study, the model tests on the later type of SWATH were carried out and were compared with the theoretical calculation by using the strip theory that neglected the interaction between catamaran hulls. Consequently, it is certified that the strip theory is usefull to predict the longitudinal motion of SWATH in head seas.