Εφαρμογή κριτηρίων ευστάθειας 2ης γενιάς για παραμετρικό διατοιχισμό σε πλοίο μεταφοράς εμπορευματοκιβωτίων

Abstract

The objectives of this thesis are divided into two parts. In the first part that has a theoretical background, the analysis of the basic 2nd generation stability criteria for container ships by the IMO (International Maritime Organization) and the application of these criteria with the basic aim of controlling the ship with respect to the authentic loss of stability and especially the behavior of the ship with respect to parametric rolling. Initially presented a historical overview of the evolution of ships (container ships) and a general description of the regulations-requirements for the 1st generation stability criteria by IMO. Methods that can determine whether a ship is vulnerable to the parametric rolling phenomenon will be mentioned by presenting detailed 2nd generation stability criteria by IMO. It is worth noting that susceptibility criteria will be documented to determine how vulnerable a ship is in a parametric fit by the US classification society (ABS) in accordance with its operational guidelines for assessing the phenomenon in the estimation of ships (container ships) for each feasible speed and direction. In the next chapter there is a deepening of the 2nd generation criteria on the parametric configuration, analyzing the first and second level vulnerability criteria. Then the experimental piece is presented, which will be preceded by the development of an experimental model in a design program Rhino 3d from real ship dimensions (Lines plan of Container ship). During the introduction of the ship in the program will be created the hull of the ship, where we are mainly interested in the wet surface of the ship to be able to make the necessary control over the phenomenon of parametric arrangement. Having created the hull of the model we will import the rhino 3DM file into an equally important stability study program, the Maxsurf. From this program will be the study where the hydrostatic characteristics of the ship will be extracted and the stability control of the ship for 2 loading situations LC10 and LC04 based on the existing stability criteria (Intact stability Criteria). In addition, the hydrostatic effects of the ship (through the Maxsurf program) will be compared with the Vulnerability Criteria levels in parametric positioning applied to real ship studies based on IMO guidelines, as mentioned in the theoretical part of the paper. In conclusion, conclusions and suggestions will be presented on the results of the experimental model studied on the levels of vulnerability in parametric positioning and the treatment of this phenomenon for container ships.