PENGARUH PERUBAHAN PROFIL DECK GIRDER TERHADAP KEKUATAN UPPER DECK ENGINE KAPAL AHTS

Abstract

The purpose of this study is to investigate the impact of modifying the deck girder profile on the structural strength of an upper deck engine on an Anchor Handling Tug Supply (AHTS) at 5200 Above Baseline Level (ABL). Structural modifications are often taken into consideration for operational needs, while maintaining safety levels and strength. This analysis was performed numerically, using the Finite Element Method (FEM). The comparison was made by using two design conditions, which were existing profile (T400x9/120x10) in contrast to modified profile (T400x9/200x15) and calculating maximum stress (von Mises type), total deformation and safety factor. The simulation results indicate the modified design reduces the maximum stress from 175,84 MPa to 110,67 MPa, total deformation reduction from 13,131 mm to 2,67 mm and for safety factor from 1,34 to 2,12. Hence these improvements suggest that the modified girder profile improves structural performance and complies with classification standards of the American Bureau of Shipping (ABS). This study also provides a technical framework whereby possibilities for structural redesign can be efficient and safe in building a ship.