KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan
Vol 23, No 2 (2026): June

Analysis of Structural Strength at the Stern with the Addition of Stern Roller on TB ASL Prosper VI Ship

Andrianto Andrianto (Ship Design and Construction Study Program, Shipbuilding Engineering, Shipbuilding Institute of Polytechnic Surabaya (PPNS))
Agung Prasetyo Utomo (Ship Design and Construction Study Program, Shipbuilding Engineering, Shipbuilding Institute of Polytechnic Surabaya (PPNS))
Luqman Cahyono (Ship Design and Construction Study Program, Shipbuilding Engineering, Shipbuilding Institute of Polytechnic Surabaya (PPNS))



Article Info

Publish Date
03 Jul 2026

Abstract

This study analyzes the structural strength of the stern of the TB. ASL PROSPER VI vessel after the addition of a stern roller, a vital component for anchor handling that significantly affects load distribution. The analysis was carried out under three loading scenarios: (1) static load with the anchor resting on the roller, (2) dynamic load during anchor lifting, and (3) extreme load according to ABS classification rules. The stern roller was modeled in 3D and analyzed using the finite element method (FEM), with validation performed through manual calculations. The results show that the designed stern roller has a total weight of approximately 3 tons. Under static conditions, the maximum stress was 2.35 MPa on the roller and 1.33 MPa on the stiffener, with a deflection of 0.69 mm and safety factors of 15.21 and 17.96, respectively, indicating a very safe condition. In the anchor lifting scenario, the stress increased to 12.45 MPa (roller) and 10.10 MPa (stiffener), with a deflection of 1.4 mm and safety factors of 12.05 (roller) and 14.98 (stiffener), which are still within safe operational limits. However, under the extreme ABS load case, the stress reached 110.74 MPa on the roller and 391.88 MPa on the stiffener, resulting in safety factors of 1.35 and 0.38, respectively, indicating structural failure in the stiffener. It can be concluded that the stern roller is structurally safe for normal operations and anchor handling, but reinforcement is required to ensure compliance with ABS standards under maximum load conditions.

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Journal Info

Abbrev

KAPAL

Publisher

Subject

Earth & Planetary Sciences

Description

Jurnal ini merupakan Jurnal Ilmiah untuk mengembangkan ilmu dibidang Ilmu Pengetahuan & Teknologi Kelautan. Jurnal ini diterbitkan oleh Teknik Perkapalan Universitas Diponegoro 3 (tiga) kali dalam 1 tahun pada bulan Februari, Juni dan ...