Pemodelan Desain Lambung Kapal Berbasis Computer Aided Design (CAD)

Pasaribu, Sheely Leony Artha (2026) Pemodelan Desain Lambung Kapal Berbasis Computer Aided Design (CAD). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sebagai salah satu negara kepulauan terbesar di dunia, Indonesia membutuhkan pengembangan teknologi desain kapal yang efisien dan mandiri. Namun, penggunaan program berbasis Computer-Aided Design (CAD) dalam industri perkapalan nasional masih didominasi oleh produk luar negeri yang bersifat komersial dan memerlukan biaya lisensi relatif tinggi. Penelitian ini bertujuan untuk mengembangkan program CAD sederhana yang dapat merepresentasikan geometri lambung kapal dan menghitung parameter hidrostatik dasar. Table offset atau fit point digunakan sebagai input awal pembentukan penampang, kemudian diproses menggunakan metode B-spline untuk menghasilkan kurva station dan control point. Perhitungan hidrostatik dilakukan melalui evaluasi kurva station, pemotongan penampang berdasarkan draft, perhitungan luas penampang terendam, serta integrasi sepanjang arah memanjang kapal. Parameter yang dihasilkan meliputi volume displacement, displacement, Longitudinal Center of Buoyancy (LCB), Length of Waterline (LWL), dan Waterplane Area (WPA). Validasi dilakukan secara bertahap melalui pengujian kurva bidang terhadap sumbu x, pengujian volume geometri sederhana berupa tabung dan sphere, serta perbandingan parameter hidrostatik lambung Moryacht terhadap Maxsurf. Hasil validasi volume tabung menunjukkan selisih sebesar 0,04% terhadap AutoCAD dan 0,14% terhadap Maxsurf. Pada validasi volume sphere, selisih yang diperoleh sebesar 0,04% terhadap AutoCAD dan 0,53% terhadap Maxsurf. Selanjutnya, validasi hidrostatik lambung Moryacht menunjukkan selisih sebesar 0,366% untuk displacement, 0,365% untuk volume displacement, 0,000% untuk LWL, 0,116% untuk LCB, dan 0,339% untuk WPA terhadap Maxsurf. Seluruh parameter hidrostatik memiliki selisih di bawah 0,5%, sehingga program yang dikembangkan dapat dinyatakan valid dan layak digunakan untuk merepresentasikan geometri lambung kapal serta melakukan perhitungan hidrostatik dasar.
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As one of the world’s largest archipelagic countries, Indonesia requires the development of efficient and technologically independent ship design tools. However, the use of ComputerAided Design (CAD) programs in the national shipbuilding industry is still dominated by foreign commercial software with relatively high licensing costs. This study aims to develop a simple CAD-based program capable of representing ship hull geometry and calculating basic hydrostatic parameters. Offset data or fit points are used as the initial input for section generation and are processed using the B-spline method to produce station curves and control points. Hydrostatic calculations are performed by evaluating the station curves, clipping the sections according to the specified draft, calculating the submerged sectional areas, and integrating them along the longitudinal direction of the hull. The resulting parameters include volume displacement, displacement, Longitudinal Center of Buoyancy (LCB), Length of Waterline (LWL), and Waterplane Area (WPA). Validation was conducted in stages through planar curve testing with respect to the x-axis, volume verification of simple geometries consisting of a cylinder and a sphere, and comparison of the hydrostatic parameters of the Moryacht hull against Maxsurf. The cylinder volume validation showed differences of 0.04% compared with AutoCAD and 0.14% compared with Maxsurf. For the sphere volume validation, the differences were 0.04% compared with AutoCAD and 0.53% compared with Maxsurf. Furthermore, the hydrostatic validation of the Moryacht hull showed differences of 0.366% for displacement, 0.365% for volume displacement, 0.000% for LWL, 0.116% for LCB, and 0.339% for WPA compared with Maxsurf. Since all hydrostatic parameters showed differences below 0.5%, the developed program can be considered valid and suitable for representing ship hull geometry and performing basic hydrostatic calculations.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	B-Spline, Computer-Aided Design, Hidrostatis, Lambung Kapal, B-Spline, Computer-Aided Design, Hidrostatic, Ship Hull
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM163 Hulls (Naval architecture) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM297 Ships Designs and drawings
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36101-(S2) Master Thesis
Depositing User:	Sheely Leony Artha Pasaribu
Date Deposited:	04 Aug 2026 03:21
Last Modified:	04 Aug 2026 03:21
URI:	http://repository.its.ac.id/id/eprint/142852

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