기상기준 평가 대체안 검토

Abstract

International Maritime Organization (IMO) is planning to include the Alternative Assessment of the Weather Criterion in new revised Intact Stability (IS) Code. In this study, the procedure of the model test in the Interim Guidelines was reviewed by carrying out the model test and analyzing the test results. To do this, RO/RO passenger ship whose ratios of breadth to draft and the height of weight to draft were more than 3.5 and 0.5 respectively was selected as a test ship. Drifting test and motion test in regular waves were performed to estimate hydrodynamic heeling lever and roll-back angle. As the drifting test results, hydrodynamic heeling lever was changed in terms of heel angles, while it was not influenced by the small change of drifting speed. Motion tests in waves were carried out in the three wave steepness conditions to measure roll-back angle and examine the feasibility of so called, the Three-step method. Using the test data, the Weather Criterion was assessed for the test ship by using alternative method and compared with the current method.