DESIGN AND LONGITUDINAL STRENGTH ANALYSIS OF EXISTING TANKER SHIP FOR CONVERSION INTO FLOATING STORAGE OFFLOADING (FSO)

• Main Author: Pramitha Putri Bhary, Tiara
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85530
• Institution: Institut Teknologi Bandung

A ship is a maritime transportation tool that, depending on its type, can serve various human needs. In the oil and gas industry, where much production activity occurs offshore, tankers are often converted into floating production facilities. A longitudinal strength analysis of the candidate ship is a regulatory requirement that must be met before conversion to ensure the structural capacity and identify necessary modifications. In this case, the oil tanker MT Ratu Rengganis is to be converted into a Floating Storage Offloading (FSO) unit, necessitating an analysis of its longitudinal strength. In this study, modeling and longitudinal strength analysis of a tanker ship's structure were carried out. The analysis was conducted according to the standards of the Indonesian Classification Bureau (BKI). To determine the structural capacity under several predefined scenarios, the shear force, bending moment, section modulus, moment of inertia, stress, and ultimate strength of the ship's structure were analyzed and calculated. The scenarios considered include the ship's condition when arriving to collect cargo with empty tanks and when in full load condition. The analysis results indicate that the maximum shear force is 1.313 tonnes and the maximum bending moment is 46,616 ton.m. The maximum stress experienced by the ship in the analyzed scenarios is 102.7 MPa. These values are within the limits established by the classification bureau's standards. Local structural analysis also reveals an ultimate strength of 470 MPa. The results of this study suggest that the ship's structure is still considered serviceable and can accommodate additional loads up to 175 MPa.