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All Journal Jurnal Teknik ITS Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan
Daniel M. Rosyid
Jurusan Teknik Kelautan Fakultas Teknologi Kelautan Institut Teknologi Sepuluh Nopember (ITS)
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Energy Engineering Transportation

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Analisa Risiko dan Langkah Mitigasi Pada Offshore Pipeline Wahyu Abdullah; Daniel M. Rosyid; Wahyudi Citrosiswoyo
Jurnal Teknik ITS Vol 1, No 1 (2012)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.113 KB) | DOI: 10.12962/j23373539.v1i1.2022

Abstract

Jurnal ini membahas mengenai analisa risiko dan langkah mitigasi pada offshore pipeline milik PT. Kodeco Energy Co. Ltd., yang menghubungkan Poleng Process Platform (PPP) diperairan Madura menuju Gresik Onshore Receiving Facility (ORF) dengan mode kegagalan pressure based. Indeks keandalan pipeline didapatkan dengan menggunakan metode Bea, sementara untuk menghitung konsekuensi kegagalan didapatkan dengan metode semi kuantitatif risk based inspection (RBI), sehingga bisa diketahui risiko dari suatu pipeline. Besarnya peluang kegagalan tiap kilometer poin (KP) pipeline akibat terjadinya burst pressure sangat kecil yaitu dibawah 0.016, sehingga pipeline andal terhadap terjadinya burst pressure, untuk besarnya tingkat risiko tiap kilometer poin (KP) pipeline adalah Menengah Tinggi (1E). Selanjutnya untuk mitigation yang digunakan berdasarkan API RBI 581 adalah inventory blowdown, sehingga besarnya tingkat risiko tiap kilometer poin (KP) pipeline menjadi Menengah (1D).
Fatigue Life Analysis of Mooring Cleats on The N219A Aircraft Floater Based on Numerical Simulation Yulfani, Rosi Dwi; Rosyid, Daniel M.; Nugroho, Wibowo Harso; Priohutomo, Kusnindar; Sugiarto, Moh. Muria Armansyah; Arianti, Erdina
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 5, Number 2, July 2024 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.v5i2.42798

Abstract

One of the procedures for rescuing a seaplane after an operational is to secure it, namely by mooring at an available port or mooring at a mooring buoy. This mooring buoy is considered a vehicle necessary for securing seaplanes in coastal conditions where it is not yet possible to build infrastructure in the form of an amphiport. To overcome this problem, seaplanes need to add a mooring cleat at the end of the bow of each float, which attaches the rope to the mooring buoy itself. So, it is necessary to study the strength of the mooring cleat itself when withstanding environmental loads. This study was carried out by modelling the mooring cleat using the finite element method to determine where the most significant stresses occur in the mooring cleat structure. Mooring cleats are modelled on deck thickness with varying thicknesses of 20mm and 40mm. The stress that occurred in the mooring cleat structure is then calculated using the Palmgren-Miner rule to determine the fatigue life of the mooring cleat for each variation. It was found that the largest von Misses stress experienced by the structure using 7075-T6 aluminium material was 147.87 MPa, which occurred in the mooring cleat, which was located on the 20mm deck thickness variation at the portside. Meanwhile, this variation's most extended fatigue life calculation occurred for the 40mm deck thickness variation on the portside with 514.43 years.
Co-Authors Arianti, Erdina Priohutomo, Kusnindar Sugiarto, Moh. Muria Armansyah Wahyu Abdullah Wahyudi Citrosiswoyo Wibowo Harso Nugroho Yulfani, Rosi Dwi