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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Applied Science and Technology on Naval Engineering
Ardiansyah Musa Efendi
Huawei Singapore Research Center
Earth & Planetary Sciences Energy Engineering Mechanical Engineering Other

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Computer Aided Design (CAD) Based Approach for Ship Hull Geometry Modelling from Offset Data Using B-Spline Curves Ardi Nugoho Yulianto; Sheely Leony Artha Pasaribu; Raybonda Reinaldi Winarko; Roisul Fadli Ahmad; Berlian Arswendo Adietya; Danu Utama; Ardiansyah Musa Efendi; Sapto Wiratno Satoto
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.01

Abstract

Indonesia, as an archipelagic country, requires the development of efficient and independent ship design technologies. This study aims to develop a B-spline-based computer aided design (CAD) program for modelling ship hull geometry from offset data and calculating basic hydrostatic parameters. The offset data are defined as fit points at each station and processed to determine the corresponding control points for generating B-spline section curves. The resulting station curves are then arranged along the longitudinal direction to form the hull geometry. Hydrostatic calculations are performed by evaluating the station curves, determining the submerged sections at a specified draft, calculating the submerged sectional areas, and integrating them along the ship length. The calculated parameters include submerged volume, displacement, Longitudinal Center of Buoyancy (LCB), Length of Waterline (LWL), and Waterplane Area (WPA). The developed program is validated using a ship model template from commercial software by comparing both hull geometry and hydrostatic results. The validation shows deviations under 0.2% for the simple curve test and under 0.35% for the hydrostatic parameters of the selected hull model. These results indicate that the developed program has the potential to serve as a local CAD alternative for preliminary hull modeling and basic hydrostatic calculations.
Optimization of Double Bottom Design in Cargo Hold Areas: Case Study Of Tanker With Lengths 150 m and Above Raybonda Reinaldi Winarko; Berlian Arswendo Adietya; Andi Trimulyono; Sunardi Sunardi; Stefanus Eko Wiratno; Ardiansyah Musa Efendi; Ardi Nugroho Yulianto
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 23, No 2 (2026): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v23i2.84390

Abstract

The shipping industry is keep advancing to produce the most efficient ship designs, including tanker ship designs. According to MARPOL Annex 1 Regulation 19, oil tankers with a deadweight of over 600 tonnes and built after 6 July 1996 must have double side and double bottom structures. These structures are intended to prevent oil spill in the event of hull damaged. However, they significantly reduce the cargo hold volume. Therefore, the objective of this research is to optimize the cargo hold volume by optimizing the double bottom design along the cargo oil tank. One of the optimization methods that can solve this problem is the brute force search method. Unlike heuristic algorithms, it provides exact rather than approximate results, making it ideal for solving small-scale problems with shorter iteration times. In this research, the variables are the locations of two cargo landing points at each knuckle of the ship's cargo oil tank. The constraints are the regulations governing clearance, stability, freeboard, and longitudinal strength of ship. The research resulted in a new design that increased the cargo oil tank volume by 375.996 m³, equivalent to 0.865%. A new ship with the same payload can be constructed using an optimized cargo oil tank configuration, reducing both the cargo tank length and the overall ship length by 1.011 m.
Co-Authors Andi Trimulyono Ardi Nugoho Yulianto Ardi Nugroho Yulianto Berlian Arswendo Adietya Berlian Arswendo Adietya Danu Utama Raybonda Reinaldi Winarko Raybonda Reinaldi Winarko Roisul Fadli Ahmad Sapto Wiratno Satoto Sheely Leony Artha Pasaribu Stefanus Eko Wiratno Sunardi Sunardi