Optimasi Desain Struktur Jacket Minimalis Tiga Kaki

Dhaneswara, I Putu Dipa (2021) Optimasi Desain Struktur Jacket Minimalis Tiga Kaki. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Inovasi desain struktur lepas pantai telah berkembang cukup pesat seiring dengan meningkatnya permintaan energi dari minyak dan gas bumi di dunia. Salah satu inovasinya adalah penggunaan struktur jaket yang dimodifikasi atau penggunaan jacket minimalis. Struktur jaket minimalis sangat cocok digunakan pada ladang marginal, karena desain strukturnya lebih ekonomis dari segi biaya, mudah dipindahkan dan dapat digunakan kembali. Tugas akhir ini menyajikan desain optimasi jacket braces dalam hal pemilihan konfigurasi braces dan ukuran braces dengan fungsi tujuan meminimalkan berat struktur jaket minimalis. Proses optimasi dilakukan dalam 2 skenario optimasi yaitu pemilihan konfigurasi brace yang paling opmimum dan menentukan dimensi brace jacket yang paling optimum dengan analisis in-place. Adapun variasi konfigurasi brace struktur jacket adalah konfigurasi V-braces(1),V-braces(2), N-braces, and K-braces . Kemudian skenario optimasi kedua dengan memodelkan variasi dimensi brace meliputi diameter luar (OD) dan tebal dinding (WT) dengan 12 variasi model. Hasil penelitian menunjukkan bahwa hasil optimasi pada jaket minimalis memiliki berat struktur yang lebih ringan yaitu sebesar 3.542,11 kips, dimana berat struktur jacket minimalis setelah adanya optimasi lebih ringan 15,9% dari berat struktur jacket awal yaitu 4.211,96 kips ======================================================================================================== The innovation design of offshore structure has developed quite rapidly in line with the increasing demand for energy from oil and gas in the world. One of innovation is the use of a modified or minimum jacket structure. A minimum jacket structure is very suitable to use at marginal fields because the design of the structure is more economical in terms of cost and easy to move and reuse than the conventional jacket. This paper presents optimization design of the jacket braces in term of braces pattern selection and sizing with the objective function of minimizing weight of the minimum jacket. The optimization process is carried out in 2 steps optimization scenarios which are to select brace configuration among various variation and sizing the jacket brace dimension through an in-place analysis of the jacket structure. Variation of the brace configurations are V-braces, N-braces, and K-braces patterns. Then the second optimization scenario by modeling the variation of the brace dimensions including outside diameter (OD) and wall thickness (WT) with 12 model variations. The results showed that optimazation yields on a minimum jacket has a lighter weight of 3.542,11 kips, where the weight of existing minimum jacket structure is 15,9 % lighter than the weight of the initial jacket structure, that is 4.211,96 kips.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Optimasi jacket minimalis, Berat Minimum, Konfigurasi brace, Dimensi brace, Optimization minimum jacket, Minimimum weight, Brace pattern, Dimension brace
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering)
T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: I Putu Dipa Dhaneswara
Date Deposited: 15 Aug 2021 09:52
Last Modified: 15 Aug 2021 09:52
URI: https://repository.its.ac.id/id/eprint/86888

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