Analisis Tegangan dan Regangan pada Sambungan Tee Jumper Spool Subsea Pipeline dengan Metode Elemen Hingga

Akbar, Valent Rosyidan (2026) Analisis Tegangan dan Regangan pada Sambungan Tee Jumper Spool Subsea Pipeline dengan Metode Elemen Hingga. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5020221028-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Subsea pipeline merupakan komponen utama dalam sistem transportasi fluida pada industri minyak dan gas lepas pantai. Salah satu bagian kritis pada sistem ini adalah sambungan Tee pada jumper spool pipeline yang berfungsi menghubungkan subsea manifold dengan existing pipeline. Sambungan tersebut memiliki geometri percabangan yang berpotensi menimbulkan konsentrasi tegangan, regangan, dan deformasi, terutama ketika dipengaruhi oleh kondisi scouring yang mengurangi dukungan tanah di sekitar pipa. Penelitian ini bertujuan untuk menganalisis pengaruh variasi panjang scouring terhadap distribusi tegangan, regangan, dan deformasi pada sambungan Tee jumper spool subsea pipeline. Analisis dilakukan menggunakan metode elemen hingga (Finite Element Method/FEM) melalui perangkat lunak AutoPIPE untuk analisis global dan ANSYS untuk analisis lokal. Tiga kondisi dianalisis, yaitu tanpa scouring, scouring sepanjang 2 m, dan scouring sepanjang 4 m. Hasil analisis global digunakan sebagai boundary condition pada analisis lokal, sedangkan evaluasi integritas struktur dilakukan berdasarkan standar DNV-ST-F101 menggunakan parameter utilization check (UC). Hasil penelitian menunjukkan bahwa peningkatan panjang scouring menyebabkan kenaikan UC global dari 0,37 menjadi 0,49 dan 0,64, sedangkan tegangan lokal meningkat dari 0,39 menjadi 0,52 dan 0,69. Regangan juga mengalami peningkatan dari 0,00082055 menjadi 0,0011487 dan 0,0016797, sementara deformasi bertambah dari 0,77806 mm menjadi 1,0916 mm dan 3,6688 mm. Meskipun seluruh parameter mengalami peningkatan akibat berkurangnya dukungan tanah, seluruh nilai utilization check masih berada di bawah batas izin (UC < 1), sehingga struktur dinyatakan masih memenuhi persyaratan keselamatan berdasarkan DNV-ST-F101. Hasil penelitian ini menunjukkan bahwa scouring memberikan pengaruh signifikan terhadap respons struktural jumper spool subsea pipeline dan perlu dipertimbangkan dalam proses desain, evaluasi integritas, serta perencanaan mitigasi guna menjamin keamanan dan keandalan operasi sistem perpipaan bawah laut.
=================================================================================================================================
Subsea pipelines are the primary components of fluid transportation systems in the offshore oil and gas industry. One of the critical components of this system is the Tee connection in a jumper spool pipeline, which connects the subsea manifold to the existing pipeline. Due to its branched geometry, the Tee connection is susceptible to stress concentration, strain, and deformation, particularly when affected by scouring that reduces soil support around the pipeline. This study aims to investigate the effect of different scouring lengths on the stress, strain, and deformation distributions of a Tee connection in a jumper spool subsea pipeline. The analysis was carried out using the Finite Element Method (FEM), employing AutoPIPE for global analysis and ANSYS for local analysis. Three conditions were evaluated: without scouring, 2 m scouring, and 4 m scouring. The results of the global analysis were used as boundary conditions for the local analysis, while the structural integrity was assessed in accordance with the DNV-ST-F101 standard using the utilization check (UC) criterion. The results indicate that increasing the scouring length causes the global UC to rise from 0,37 to 0,49 and 0,64, while the local stress increases from 0,39 to 0,52 and 0,69. The strain also increases from 0.00082055 to 0.0011487 and 0.0016797, whereas the deformation grows from 0.77806 mm to 1.0916 mm and 3.6688 mm. Although all structural response parameters increase due to the reduction of soil support, the utilization check values remain below the allowable limit (UC < 1), indicating that the structure satisfies the safety requirements specified in DNV-ST-F101. These findings demonstrate that scouring has a significant influence on the structural response of jumper spool subsea pipelines and should therefore be considered during the design process, structural integrity assessment, and mitigation planning to ensure the safety and reliability of subsea pipeline systems.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kata kunci: subsea pipeline, jumper spool, sambungan Tee, scouring, metode elemen hingga, DNV-ST-F101. Keywords: subsea pipeline, jumper spool, Tee connection, scouring, Finite Element Method, DNV-ST-F101
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA656.2 Buckling 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:	Valent Rosyidan Akbar
Date Deposited:	21 Jul 2026 04:31
Last Modified:	21 Jul 2026 04:31
URI:	http://repository.its.ac.id/id/eprint/136044

Actions (login required)

View Item