Analisis Tegangan Pada Pipeline End Manifold (PLEM) Akibat Variasi Penempatan Posisi PLEM Terhadap SPM

Agriawan, Antonius (2025) Analisis Tegangan Pada Pipeline End Manifold (PLEM) Akibat Variasi Penempatan Posisi PLEM Terhadap SPM. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pipeline End Manifold (PLEM) merupakan komponen penting dalam sistem offshore marine terminal yang berfungsi sebagai penghubung antara subsea pipeline dan sistem terapung seperti Single Point Mooring (SPM). Variasi jarak antara PLEM dengan SPM dapat mempengaruhi konfigurasi subsea hose serta gaya yang bekerja pada PLEM, termasuk gaya tarik, gaya geser, momen bending, dan momen puntir. Penelitian ini dilakukan dengan tujuan untuk menganalisis pengaruh variasi penempatan posisi PLEM terhadap distribusi tegangan pada struktur PLEM dengan pendekatan simulasi numerik dinamis menggunakan metode elemen hingga (Finite Element Method/FEM). Parameter yang dianalisis meliputi gaya aksial, gaya geser, momen tekuk, momen puntir, minimum bending radius, dan line clearance pada subsea hose serta reaksi gaya dan momen dari expansion pipeline. Hasil menunjukkan bahwa semakin jauh posisi PLEM terhadap SPM, subsea hose mengalami regangan yang lebih besar, yang menimbulkan gaya aksial yang lebih besar pada struktur PLEM. Disisi lain, untuk konfigurasi 1 string hose, semakin dekat PLEM terhadap SPM, justru menimbulkan momen tekuk yang lebih besar pada struktur PLEM. Gaya dan momen dari subsea hose serta expansion pipeline memberikan kontribusi signifikan terhadap distribusi tegangan pada PLEM, namun nilai tegangan masih berada di bawah batas izin standar ASME B31.4 dan ABS DLA untuk komponen perpipaan dan komponen struktur PLEM. Temuan ini memberikan wawasan penting dalam optimasi penempatan posisi PLEM guna meningkatkan keandalan dan keselamatan operasional sistem terminal lepas pantai.
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The Pipeline End Manifold (PLEM) is a crucial component in offshore marine terminal systems, serving as a connection between subsea pipelines and floating systems such as Single Point Mooring (SPM). The variation in distance between the PLEM and the SPM can affect the configuration of the subsea hose and the forces acting on the PLEM, including axial force, shear force, bending moment, and torsional moment. This study aims to analyze the effect of PLEM position variation on the stress distribution within the PLEM structure using a dynamic numerical simulation approach based on the Finite Element Method (FEM). The analyzed parameters include axial force, shear force, bending moment, torsional moment, minimum bending radius, and line clearance on the subsea hose, as well as reaction forces and moments from the expansion pipeline. The results indicate that the farther the PLEM is placed from the SPM, the greater the strain experienced by the subsea hose, resulting in higher axial forces acting on the PLEM structure. Conversely, for the single-string hose configuration, placing the PLEM closer to the SPM induces higher bending moments on the PLEM structure. The forces and moments from the subsea hose and expansion pipeline significantly contribute to the stress distribution on the PLEM, however, the resulting stress values remain below the allowable limits specified by ASME B31.4 and ABS DLA standards for piping and structural components. These findings provide valuable insights for optimizing PLEM positioning to enhance the reliability and operational safety of offshore marine terminal systems.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Metode Elemen Hingga, Pipeline End Manifold, Single Point Mooring, Tegangan, Variasi Jarak ======================================================================================================================== Finite Element Method, Pipeline End Manifold, Single Point Mooring, Stress, Distance Variation
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method
Divisions:	Faculty of Marine Technology (MARTECH) > Offshore Engineering > 54040-(S1) Undergraduate Thesis
Depositing User:	Antonius Agriawan
Date Deposited:	25 Jul 2025 07:15
Last Modified:	25 Jul 2025 07:15
URI:	http://repository.its.ac.id/id/eprint/121052

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