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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan
Berlian Arswendo Adietya
Department of Naval Architecture, Diponegoro University
Earth & Planetary Sciences

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Development of a CAD-Based Subprogram for Bill of Materials Generation in Midship Section Area of Cargo Oil Tank Roisul Fadli Ahmad; Berlian Arswendo Adietya; Muhammad Luqman Hakim; Ari Santoso; Triyanda Gunawan; Hasanudin Hasanudin; Muhammad Hilmy Alfaruqi; 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.v23i2.84393

Abstract

One of the challenges in shipbuilding is managing the Bill of Materials (BOM), caused by the existence of separate BOM versions for the design, production, and maintenance stages. In addition, most BOM preparation still involves manual processes. This results in additional work in the form of BOM transformation and repeated verification, as the multiple manually created BOM versions are highly prone to data inconsistencies and duplication. This study aims to simplify BOM preparation by developing a CAD-integrated add-on program capable of automatically generating BOM from ship section design. The proposed add-on program is expected to provide a solution for facilitating BOM data transfer between shipyard divisions, thereby reducing the risk of data inconsistencies and speeding up decision-making in ship construction. The research method includes collecting material data (ship profiles and plates), creating profile and plate model templates, designing the add-on program, and developing a user guide for the add-on. The add-on program will consist of three components: Drawing Tool for modeling, Part Identification for marking structural components in the ship section design, and BOM Calculation for calculating the Bill of Materials from the structural components in the ship section design. The expected outcome of this research is the development of an add-on program capable of automatically generating a BOM from a ship’s section design, demonstrated through a case study on the cargo oil tank section in the parallel middle body of a tanker.
Ship Hull Geometry Design by Using B-Spline Curve Fitting and Lofted Surface Generation Sheely Leony Artha Pasaribu; Berlian Arswendo Adietya; Muhammad Iqbal; Hasanudin Hasanudin; Wiwin Sulistyawati; Mohammad Sholikhan Arif; 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.v23i2.84399

Abstract

As one of the largest archipelago countries in the world, Indonesia requires technological capability to independently develop efficient ship design systems. Currently, the Computer-Aided Design (CAD) software used for domestic ship design is still largely dominated by foreign commercial products, which require costly subscription fees. This dependence limits the technological independence of the national shipbuilding industry. This study aims to develop a simple CAD-based program for representing ship hull geometry using a parametric mathematical approach. The program reconstructs sectional curves using mathematics formulations and generates a continuous three-dimensional hull surface through a lofting method based on equal arc-length discretization and triangular mesh representation. The research methodology includes system design, curve and surface generation, geometric visualization, and validation through comparison with results obtained from commercial CAD software. The results demonstrate that the developed system is capable of accurately reconstructing sectional curves and generating a consistent lofted hull surface suitable for representing simple ship hull forms. This work provides an initial step toward the development of domestic ship hull design tools to support preliminary geometric modeling in Indonesia’s maritime industry.
Co-Authors Ardi Nugroho Yulianto Ari Santoso Hasanudin Hasanudin Mohammad Sholikhan Arif Muhammad Hilmy Alfaruqi Muhammad Iqbal Muhammad Luqman Hakim Roisul Fadli Ahmad Sheely Leony Artha Pasaribu Triyanda Gunawan Wiwin Sulistyawati