DEVELOPMENT OF PONTOON DESIGN AS A DOCK PREPARATION AID

Abstract

PT X is a maritime industry company engaged in shipping and uses an airbag docking system on the slipway. Before the docking process, the ship must go through a dock preparation stage that requires a pontoon as a floating work platform. This pontoon functions as a medium for crossing the ship's crew and placing work aids such as eyelugs and scaffolding. However, the existing pontoon design experienced structural failure and instability, so a redesign was carried out. Analysis was carried out to ensure the structural strength against a load of 500 kg and the stability of the pontoon. The methodology used included selecting a design concept using the ulrich method and static stress analysis and stability using the Finite Element Method (FEM) approach. Of the three concepts developed, the second concept was selected with a safety factor value of 2.014, a maximum Von Mises Stress of 123.268 MPa, and a maximum GZ stability of 600.2 mm at an angle of 19.1°. This design was then calculated for the Budget Plan (RAB) with a total of Rp9,757,584. The analysis results indicate that the pontoon design meets the strength and stability criteria required to safely and efficiently support dock preparation activities. Keywords: design, finite element method, pontoon, stability, ulrich method