Analisis On-Bottom Stability Dan Local Buckling Pipa Bawah Laut Pada Kondisi Operasi Di Blok MDA Dan MBH, Selat Madura

Shidqi, Muhammad Azmi (2020) Analisis On-Bottom Stability Dan Local Buckling Pipa Bawah Laut Pada Kondisi Operasi Di Blok MDA Dan MBH, Selat Madura. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pipa bawah laut merupakan salah satu mode transportasi yang sering digunakan untuk mendistrubusikan minyak dan gas secara efisien. Diletakkan di dasar laut dengan jarak yang jauh dan dapat mengangkut minyak dan gas dalam jumlah besar serta lebih ekonomis. Selama masa operasi, pipa harus selalu dalam kondisi stabil dan hindari kegagalan agar produksi berjalan tanpa gangguan. Pada penelitian ini, penulis akan menganalisis on-bottom stability dan local buckling pipa bawah laut pada kondisi operasi di Blok MDA dan MBH, Selat Madura. Tujuan dari analisis on-bottom stability untuk mengetahui kondisi pipa bawah laut di dasar laut stabil secara lateral dan secara vertikal pada masa operasi yang disebabkan oleh gaya-gaya hidrodinamis berdasarkan Recommended Practice DNV RP F109 mengenai “On-Bottom Stability Design of Submarine Pipelines”. Serta analisis local buckling untuk mengetahui jarak aman maksimum free span yang diizinkan berdasarkan Standard DNV OS F101 mengenai “Submarine Pipeline System”. Besar gaya hidrodinamika puncak lateral dan vertikal pada kedalaman 106,5 meter adalah 82,863 N/m dan 61,957 N/m, sementara nilai tahanan pasif adalah 323,249 N/m. Hasil analisis stabilitas vertikal memenuhi desain kriteria dengan nilai 0,715 dan stabilitas lateral memenuhi desain kriteria dengan nilai 0,277. Serta pipa memenuhi desain kriteria dan masih dalam batas aman dari terjadinya local buckling.
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Offshore pipeline is one option of transportation that is often used to efficiently distributing oil and gas. Located on the seabed with a long distance and able to transport oil and gas in large quantities but more economical. During the operating period, the pipe must always be in a stable condition and avoid failure in order to production runs uninterrupted. In this research, the author will analyze the on-bottom stability and local buckling of offshore pipeline on operating condition in MDA and MBH Block, Madura Strait. The purpose of the on-bottom stability analysis is to determine the condition of the offshore pipeline on the seabed laterally and vertically stable during the operation caused by hydrodynamic forces based on Recommended Practice DNV RP F109 "On-Bottom Stability Design of Submarine Pipelines". And local buckling analysis to determine the distance of maximum free span which is allowed based on Standard DNV OS F101 "Submarine Pipeline System". The peaks hydrodynamic forces of lateral and vertical value at depth of 106.5 meters are 82.863 N/m and 61.957 N/m, while the passive resistance value is 323.249 N/m. The results of the analysis of vertical stability meet the design criteria with a value of 0.715 and lateral stability meet the design criteria with a value of 0.277. And the pipe meets the design criteria and still within safe limits from the occurrence of local buckling.

Item Type:	Thesis (Other)
Additional Information:	3100020085229 RSKe 621.867 2 Shi a-1
Uncontrolled Keywords:	Pipa Bawah Laut, On-Bottom Stability, Local Buckling, DNV RP F109, DNV OS F101.
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures T Technology > TJ Mechanical engineering and machinery > TJ930 Pipelines (General). Underwater pipelines. T Technology > TN Mining engineering. Metallurgy > TN880.5 Natural gas pipelines
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Azmi Shidqi
Date Deposited:	02 Jan 2023 04:46
Last Modified:	02 Jan 2023 04:46
URI:	http://repository.its.ac.id/id/eprint/73538

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