GM 및 종경사 변경에 따른 선박의 조종성능변화에 관한 실험적 연구

• Published in: 大韓造船學會 論文集 Vol. 57; no. 4; pp. 230 - 240
• Main Authors: 윤근항(Kunhang Yun), 김동진(Dong Jin Kim), 여동진(Dong Jin Yeo)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2020
• Subjects: 조선공학; KCS(KCS); FRMT(자유항주모형시험); Trim condition(종경사); GM(메타센터높이); Manoeuvrability(조종성능)
• ISSN: 1225-1143; 2287-7355
• DOI: 10.3744/SNAK.2020.57.4.230

The aim of this study was to investigate the manoeuvrability of a ship in different Center of Gravity (CG) conditions. Free Running Model Tests (FRMT), such as 35°turning circle tests, 20/20 zigzag manoeuvring tests, and 10/10 zigzag manoeuvring tests, were conducted in three GM and three trim conditions with 1/65.83 scaled KRISO Container Ship (KCS). The test results indicated that KCS in the lower GM condition and the trim by bow condition showed reduced advance and tactical diameter in turning circle tests and increased overshoot angles in zigzag tests, and those manoeuvring indices were strongly related with roll angle. In addition, sensitivity indices for three-axis CG position were suggested with prior research, and it showed that y-axis CG position significantly affected manoeuvrability of KCS due to the low GM. Therefore, in the case of KCS, it is evident that the roll angle during manoeuvre is closely related with manoeuvring indices.