Analisis Sensitivitas Konfigurasi Sudut Stinger Pada Instalasi Pipa 16 Inchi Metode S LAY dengan Beberapa Kedalaman

Muhammad, Alif Defa (2024) Analisis Sensitivitas Konfigurasi Sudut Stinger Pada Instalasi Pipa 16 Inchi Metode S LAY dengan Beberapa Kedalaman. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Produksi migas lepas pantai di Indonesia dominan di perairan dangkal hingga
menengah. Sebelum pipa bawah laut beroperasi, pemasangan pipa harus direncanakan dengan
hati-hati untuk menghindari kerusakan. Metode instalasi seperti S-lay cocok untuk kedalaman
air maksimum 300 meter, sesuai dengan perairan Indonesia yang relatif dangkal, memerlukan
tegangan yang cukup untuk menghindari kendurannya saat instalasi di stinger dan area
touchdown.Penelitian ini bertujuan untuk menganalisis pengaruh sensitivitas konfigurasi sudut
stinger terhadap berbagai kedalaman dan batas gelombang pada saat instalasi.Hasil analisis
menunjukkan bahwa Perubahan kedalaman memperlihatkan bahwa tegangan pada pipa sensitif
terhadap penurunan sudut stinger. Konfigurasi sudut stinger 8.84° dan 11.1° menunjukkan
pengaruh yang signifikan terhadap penurunan tegangan pipa sebesar 7-12%. Maximum von
mises stress pipa terbesar ditunjukkan pada variasi sudut stinger senilai 4.4° di kedalaman 50
meter senilai 439.79 MPa. Arah dan tinggi gelombang saat instalasi juga mempengaruhi
tegangan pipa secara signifikan. Arah beban gelombang yang paling sensitif saat instalasi
berlangsung adalah dari arah beam seas atau arah 90°. Berdasarkan simulasi, pada kasus
ini,batas tinggi gelombang pada arah 90° agar tegangan pipa tidak melebihi allowable stress
adalah Hs 1.2 m pada kedalaman 50 m, Hs 2 m pada kedalaman 40 m, dan Hs 2.8 m pada
kedalaman 30 m.Tidak terjadi local buckling pada pipa saat instalasi. Penelitian ini memberikan
pemahaman dan rekomendasi praktis untuk mengoptimalkan konfigurasi sudut stinger
terhadap kedalaman dan batas gelombang dalam menghindari kegagalan akibat tegangan
berlebih. =================================================
Offshore oil and gas production in Indonesia is predominantly in shallow to medium
waters. Before subsea pipelines go into operation, their installation must be carefully planned
to avoid damage. Installation methods such as S-lay suitable for a maximum water depth of 300
meters, in accordance with Indonesia's relatively shallow waters, require sufficient stress to
avoid sagging during installation at the stinger and touchdown area.This study aims to analyze
the effect of the sensitivity of the stinger angle configuration to various depths and wave limits
during installation.The results of the analysis show that Changes in depth show that the stress
in the pipe is sensitive to the decrease in stinger angle. Stinger angle configurations of 8.84°
and 11.1° show a significant effect on pipe stress reduction by 7-12%. The largest pipe
maximum von mises stress is shown in the stinger angle variation of 4.4° at a depth of 50 meters
at 439.79 MPa. The wave direction and height during installation also significantly affected the
pipe stress. The most sensitive wave load direction during installation is from the beam seas
direction or 90° direction. Based on the simulation, in this case, the wave height limit in the
90° direction so that the pipe stress does not exceed the allowable stress is Hs 1.2 m at a depth
of 50 m, Hs 2 m at a depth of 40 m, and Hs 2.8 m at a depth of 30 m. No local buckling occurs
in the pipe during installation.This research provides an understanding and practical
recommendations to optimize the stinger angle configuration with respect to depth and wave
limit to avoid failure due to excessive stress.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Pipa, S-Lay, sudut stinger,kedalaman,batas gelombang,Pipeline, S-Lay, Maximum von mises stress,sudut stinger,depth,wave limits
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 > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Alif Defa Muhammad
Date Deposited:	26 Jul 2024 04:11
Last Modified:	26 Jul 2024 04:11
URI:	http://repository.its.ac.id/id/eprint/109024

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