Analisis Lokal Kekuatan Chain Connector pada External Turret Mooring System FLNG Masela dengan KOnfigurasi Chain Line

Rahmadhani, Patria (2017) Analisis Lokal Kekuatan Chain Connector pada External Turret Mooring System FLNG Masela dengan KOnfigurasi Chain Line. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

FLNG merupakan anjungan produksi dan fasilitas penyimpanan yang efisien untuk menyalurkan gas bumi yang dieksploitasi. Dalam masa operasionalnya FLNG membutuhkan system tambat untuk menjaganya tetap pada posisinya, salah satu yang umum digunakan adalah Turret Mooring System. Pada tugas akhir ini akan dianalisis mengenai kekuatan pada salah satu bagian vital Turret Mooring System yaitu chain connector yang terletak pada mooring linenya, berupa H-Link Connector yang saling menghubungkan antar chain line. Analisa awal dilakukan dengan mencari tension maksimal yang terjadi pada konfigurasi 12 mooring lines dan 9 mooring lines dengan metode time domain analisys selama 3 jam yang akan dipakai sebagai bahan input pembebanan pada analisa lokal kekuatan chain connector. Analisa lokal kekuatan chain connector dilakukan dengan tanpa chain dan juga menggunakan variasi 1 pasang dan 2 pasang chain. Tegangan maksimum chain connector pada konfigurasi 12 mooring lines terjadi pada pemodelan chain connector tanpa chain dengan besar tegangan von-mises maksimum sebesar 288,56 MPa dan nilai deformasi maksimum sebesar 1,349 mm. Sementara pada konfigurasi 9 mooring lines tegangan lokal maksimum chain connector juga terjadi pada pemodelan chain connector tanpa chain dengan besar tegangan von-mises maksimum sebesar 359,22 MPa dengan nilai deformasi maksimum sebesar 2,97 mm. Semua hasil tegangan von-mises yang terjadi masih dibawah 90% yield strength material atau sebesar 369 MPa, maka struktur dinyatakan aman untuk beroperasi. ============================================================ FLNG is a production platforms and efficient storage facilities to distributing exploited natural gas. During its operation, FLNG requires a mooring system to keep it in position, one of which is commonly used is Turret Mooring System. This final project will analyzing the strength of chain connector which is one of the vital parts of Turret Mooring System that located on its mooring line, in the form of H-Link Connector and interconnecting between chain lines. Initial analysis was performed by finding the maximum tension that occurred in configuration of 12 mooring lines and 9 mooring lines by time domain analisys method for 3 hours which will be used as input for stress loading on local strength analysis. Local strength analysis on chain connector will be analysed without using chain and using chain in variety of 1 pair chains and 2 pair chains. The result of analysis are, in the configuration of 12 mooring lines, the maxsimum von-mises stress occur on chain connector model without using chain with the value of 288,56 MPa and 1,349 mm at maximum deformation. Meanwhile in the configuration of 9 mooring lines, the maximum von-mises stress also occur on chain connector model without using chain with the value of 359,22 MPa and 2,97 mm at maximum deformation. All the results of the von-mises stresses in this analysis are under 90% yield strength material or equal to 369 MPa, hence the structure is declared safe and able to be operating in Masela FLNG.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Turret mooring system; tension; FLNG; chain connector; tegangan
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method
T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering)
T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
V Naval Science > V Naval Science (General)
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM293 Shipping--Indonesia--Safety measures
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: Patria Rahmadhani
Date Deposited: 10 Aug 2017 02:38
Last Modified: 08 Mar 2019 03:16
URI: http://repository.its.ac.id/id/eprint/45236

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