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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Civil Engineering Journal Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Maritime Park: Journal Of Maritime Technology and Socienty Riset Sains dan Teknologi Kelautan
Assidiq, Fuad Mahfud
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health

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Comparative Numerical Analysis Fatigue Damage Based On Variation In Quantities Mooring Line On Aker Smart 2 FPSO Aulia, Nur Salsabila; Assidiq, Fuad Mahfud
Maritime Park: Journal of Maritime Technology and Society Volume 3, Issue 1, 2024
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.v3i1.32980

Abstract

The Aker Smart 2 FPSO is the second FPSO from the Norwegian FPSO operator: Aker Floating Production, and will operate for Reliance in India. This FPSO will be moored with a mooring system catenary to the seabed. In its operation, the FPSO will be influenced by dynamic loads such as sea waves, ocean currents and wind on the mooring rope structure periodically. This may cause damage to the structure mooring line which influences the performance of the operational structure. The aim of this research is to investigate motion trajectory (surge & sway), mooring line stress, and deterministic fatigue on the mooring system catenary by making comparisons using variations in quantities mooring line. Dimensions mooring line type chain on fairlead with varying amounts mooring line namely 4x1, 4x2, and 4x3 which will then be analyzed fatigue damage-his. Numerical observations of FPSO motion on following seas, stern quartering seas, beam seas, bow quartering seas, and head seas show Response Amplitude Operator from movement surge, sway, heave, roll, pitch, and yaw due to harsh environments with Hs = 2.0 meters and T = 12 seconds. Observation Motion Trajectory it is found that the greater the number mooring line then value DOffset or movement surge & sway will get smaller. Meanwhile, in observation Mooring Line Stress and Fatigue Damage obtained both are directly proportional where the greater the tension mooring line the greater the damage. This is because the mass of the rope used is not proportional to displacement boat. And in this numerical analysis simulation it only reaches the initial movement, namely at 100 seconds, where the ship's condition has not yet reached the stable condition it should be.
Analysis of the Effect of Using Concrete Mattresses on Subsea Pipelines Risal, Risal; Sade, Juswan; Assidiq, Fuad Mahfud
Maritime Park: Journal of Maritime Technology and Society Volume 3, Issue 2, 2024
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.v3i2.35390

Abstract

This Leaks in oil and gas pipes under the sea will cause pollution and threaten the ecosystem in the sea. Damage to underwater pipes caused by anchors has quite a large percentage, therefore good prevention efforts are needed so that leaks do not occur which have a negative impact on environment and economy. The aim of this research is to find out how the strength compares between pipes that use protective concrete mattresses and pipes without protective concrete mattresses when hit by ship anchors. This research uses explicit dynamic simulation using Finite Element Method software. Based on explicit dynamic analysis, deformation values ​​and equivalent stress values ​​are obtained after being hit by an anchor at a speed of 5,491 m/s. For unprotected pipes experiencing significant damage, when viewed from the deformation values ​​obtained, namely amounted to 0.143 m, while for the pipe model with protection the deformation value obtained was 0.0769 m. For pipes without protection and pipes that use protection with a thickness of 0.15 m, the deformation value is both above the maximum value that has been determined, namely 10% of the diameter value and when viewed from the equivalent stress value, for pipes without protection the equivalent stress value is obtained. namely 1,150 MPa, while the pipe that uses a protector is 240 MPa, the equivalent stress value obtained by the pipe using a protector is below 780 MPa, which means that the use of pipe protectors is quite effective in reducing damage that occurs to the pipe.
Co-Authors ., Ashury Ahmad, Rati Alie, Muh. Zubair Andriadi, Andi M. Rezky Ashury, Ashury Aulia, Nur Salsabila Azisah, Nur Ba Naga, Mohammed Hussein Baeda, Achmad Yasir Baeda Yasir Chairul Paotonan Daeng Paroka dj, ashury Fiqri, Muh Rizal Firman Husain Hasdinar Umar Julyardiansyah, Fadhil Juswan . K, Riswal M Nur, Fahrul Maming, Muhammad Idhil Muhammad Zubair Muis Alie Muhiddin, Amir H. Munadiah, Nurul Nadjmi, Nurul Nasir, Andi Mega Mustika Novriany Amaliyah Palisu, Brian Jaya Patandianan, Maraya Abisurya Purnama, Bulan Rahman, Sabaruddin Rahman Ramadani, Anisa Eka Sabaruddin Rahman Sade, Juswan Sakinah, Whina Saparuddin, Sulkifli Sarifuddin, Andika Sitti Hijraini Nur Taufiqur Rachman Umar, Muh. Fitrah Ramadhan