Pemilihan Desain Geometri Single Point Mooring (SPM)

Rachman, Abdur (2026) Pemilihan Desain Geometri Single Point Mooring (SPM). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Single Point Mooring (SPM) merupakan fasilitas tambat lepas pantai yang digunakan untuk mendukung transfer fluida antara kapal tanker dan fasilitas produksi. Kinerja SPM dipengaruhi oleh geometri buoy yang menentukan karakteristik hidrodinamika, beban mooring, dan kekuatan struktur. Penelitian ini bertujuan mengoptimalkan desain geometri Hexagonal SPM dengan membandingkan satu model silinder (M1) dan dua model heksagonal (M2 dan M3) yang memiliki variasi diameter dan draft. Analisis yang dilakukan meliputi analisis hidrodinamika untuk memperoleh Response Amplitude Operator (RAO), analisis mooring menggunakan simulasi time-domain, serta analisis kekuatan struktur menggunakan metode elemen hingga (Finite Element Method/FEM). Hasil penelitian menunjukkan bahwa perubahan geometri dari silinder menjadi heksagonal mampu menurunkan beban mooring secara signifikan. Pada kondisi ekstrem, mooring tension maksimum model M1 mencapai 2293,66 kN, sedangkan model M2 dan M3 masing-masing sebesar 304,36 kN dan 384,04 kN. Hasil ini menunjukkan bahwa geometri heksagonal dengan draft yang lebih besar mampu meningkatkan performa hidrodinamika sehingga mengurangi beban pada sistem mooring. Analisis struktur menunjukkan bahwa seluruh model memenuhi kriteria tegangan ijin pada kondisi operasi maupun ekstrem. Berdasarkan hasil evaluasi yang dilakukan, model heksagonal M2 memberikan performa terbaik dengan nilai mooring tension terendah dan memenuhi persyaratan kekuatan struktur.
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Single Point Mooring (SPM) is an offshore mooring facility used to support fluid transfer operations between tankers and production facilities. The performance of an SPM is influenced by the buoy geometry, which determines its hydrodynamic characteristics, mooring loads, and structural strength. This study aims to optimize the geometry design of a Hexagonal SPM by comparing one cylindrical model (M1) and two hexagonal models (M2 and M3) with different diameter and draft configurations. The analyses conducted include hydrodynamic analysis to obtain the Response Amplitude Operators (RAOs), mooring analysis using time-domain simulations, and structural strength analysis using the Finite Element Method (FEM). The results show that changing the buoy geometry from a cylindrical to a hexagonal shape significantly reduces mooring loads. Under extreme conditions, the maximum mooring tension of model M1 reached 2,293.66 kN, while models M2 and M3 produced maximum tensions of 304.36 kN and 384.04 kN, respectively. These results indicate that a hexagonal geometry with a larger draft can improve hydrodynamic performance, thereby reducing the loads transmitted to the mooring system. Structural analysis results show that all models satisfy the allowable stress criteria under both operational and extreme conditions. Based on the overall evaluation, the hexagonal model M2 demonstrated the best performance by achieving the lowest mooring tension while meeting the structural strength requirements.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Single Point Mooring, Hexagonal Buoy, optimasi geometri, hidrodinamika, mooring tension, finite element method Key words: Single Point Mooring, Hexagonal Buoy, Geometry Optimization, Hydrodynamics, Mooring Tension, Finite Element Method
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM297 Ships Designs and drawings V Naval Science > VM431 Fishing boats
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38101-(S2) Master Thesis
Depositing User:	Abdur Rachman
Date Deposited:	14 Aug 2026 06:08
Last Modified:	14 Aug 2026 06:09
URI:	http://repository.its.ac.id/id/eprint/143956

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