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All Journal Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Riset Sains dan Teknologi Kelautan
Rati Ahmad
Universitas Hasanuddin
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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Analisis Vertical Plate pada Variasi Aliran di Lunas SPAR Rati Ahmad
SENSISTEK:Riset Sains dan Teknologi Kelautan Volume 6, Nomor 1, Tahun 2023
Publisher : Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin

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Abstract

The progress of human civilization today is also followed by increasing demand to fulfill energy needs, including the need for oil and gas. SPAR (Single Point Anchor Reservoir) is one of the suitable and efficient offshore floating structures for use in deep waters for drilling, production, processing, storage and as a renewable power plant. SPAR Platform consists of a cylinder that floats vertically in the water. The natural period of SPAR structures spread across the Gulf of Mexico generally has a natural period of 60 s for pitch. Vertical Plate can be an alternative solution to reduce rotational movement so that the SPAR system becomes more stable and functions more efficiently. The research method conducted in this study is a numerical calculation method using the application of computational fluids dynamics (CFD). The most turbulence flow occurs at a speed variation of 0.1 m/s, so it is concluded that not always the greatest flow velocity that passes through the vertical plate will also occur a lot of turbulence flow. Simulating the flow speed after passing through the vertical plate will become turbulence flow and the speed decreases due to the flow become turbulence. The speed change that occurs in simualation with 3 speed variations of 0.1 m/s, 1 m/s, and 10m/s exceeds the same speed change ratio of 1.52. The greatest pressure occurs in simulations on the vertical plate that is directly exposed to the direction in which the flow comes.
Analisis Pelat Berpenegar dengan Mempertimbangkan Pelat Ikutan dalam Pengaruh Beban Aksial Satu Arah pada Kapal FPSO Rati Ahmad; Firman Husain; Muhammad Zubair Muis Alie
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 4, Nomor 3, Edisi November 2023
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.v4i3.30106

Abstract

Floating Production Storage and Offloading (FPSO) is the portable offshore structure. The material configuration used is the most important aspect in the FPSO structure design criteria. Plates and Stiffened and plates experience local buckling due to the external load when the hull girder collapsed. The objective of the present study is to analyze the stiffened plates taking the attached plate thickness into consideration on the FPSO in term of plate deformation and deflection located of the bottom area under tension and compression stages. In this study the attached plating thickness is varied according to FPSO data and BKI Rule. The stiffened plate elements located at the bottom are modelled by Tee-Bar element. The simply supported condition is applied to the model and the Non-Linier Finite Element Method (NLFEM) is used for the analysis. The result obtained by NLFEM shows that under tension and compression the stiffened plate of model of the thickened plate of the FPSO, the deflection are 1.75 mm and -1.75 mm, respectively. While for model of corrugated plates with BKI minimum intervening plate thickness the deflection are 1.8 mm and -1.8 mm under tension and compression, respectively.
Co-Authors Firman Husain Muhammad Zubair Muis Alie