Studi Analitis, Numeris, dan Eksperimen Olah Gerak Serta Dinamika Tegangan Sistem Tambat Model SPAR Tipe Klasik Dalam Kondisi Free Floating dan Tertambat dengan Variasi Konfigurasi Tali (Taut, Catenary 1, dan Catenary 2)

ishaq, irza (2017) Studi Analitis, Numeris, dan Eksperimen Olah Gerak Serta Dinamika Tegangan Sistem Tambat Model SPAR Tipe Klasik Dalam Kondisi Free Floating dan Tertambat dengan Variasi Konfigurasi Tali (Taut, Catenary 1, dan Catenary 2). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Floating structure telah digunakan secara luas untuk kegiatan ekplorasi dan produksi minyak dan gas di laut dalam. Floating structure jenis SPAR menjadi alternatif untuk penyimpanan minyak dan gas di laut dalam. SPAR terdiri dari silinder vertikal yang menyediakan buoyancy untuk mendukung fasilitas yang berada di atas permukaan air. SPAR tertambat menggunakan sistem tambat konvensional atau taut catenary mooring lines saat beroperasi di laut lepas. Dalam penelitian ini, dilakukan analisa secara analitis, numerik dan eksperimen model SPAR (skala 1:125) di laboratorium Hidrodinamika ITS dalam kondisi free floating dan tertambat dengan variasi konfigurasi tali tambat (taut, catenary 1, dan catenary 2) untuk mengetahui karakteristik gerakan SPAR (surge, heave, pitch) dan tegangan tali maksimum yang terjadi dalam bentuk RAO gerak dan RAO tension. Dari hasil penelitian didapatkan untuk kondisi free floating dan tertambat, RAO gerakan model mengalami perubahan yang signifikan. Sedangkan, untuk variasi konfigurasi tali tambat RAO gerak saat model menggunakan taut mooring lebih kecil dibandingkan dengan catenary mooring. Jadi, pengaruh dari tipe mooring line signifikan untuk RAO gerak. Untuk RAO tension tali tambat, tension tali yang terjadi pada catenary mooring lebih besar dibandingkan taut mooring karena offset yang terjadi lebih besar dan berat dari tali bertambah. ================================================================= Floating structure has been used widely for the exploration and production oil and gas in deepsea. SPAR (Single Point Anchor Reservoir) is floating structure that used for store oil and gas in deepsea. SPAR is consist of vertical sylinder that provide buoyancy to support the facilities above the surface of water. To keep its position when operates, SPAR uses conventional mooring system or taut catenary mooring lines. In this research, experiment SPAR model using froud scale 1:125 in free floating and moored condition with variation of mooring system configuration (taut, catenary 1, and catenary 2) is carried out in Hydrodynamics Laboratory ITS. The purpose of this research is to know the characteristic behavior of SPAR motion (surge, heave, pitch) and maximum mooring line tension in dynamic function presented using RAO motion and RAO tension. The result of experiment will be compared with the analytical and numerical result using MOSES EDITOR. From the result of this research concluded that for the free floating and moored condition, RAO motion of the model changes significantly. Then, for the variation of mooring system configuration concluded that RAO motion when the model using taut mooring is less than using catenary mooring. So, the effect of mooring line type is significant for RAO motion. For the RAO tension mooring line, the tension line that occur in catenary mooring is more than taut mooring because the offset when using catenary mooring is high and the increasing weight of the mooring line made the tension is more higher than taut mooring.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: SPAR, mooring system, taut, catenary, eksperimen, analitik, numerik
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General) > TA1637 Image processing--Digital techniques
T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method
V Naval Science > V Naval Science (General)
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Irza Yanuar Ishaq
Date Deposited: 08 Nov 2017 06:35
Last Modified: 08 Mar 2019 03:50
URI: http://repository.its.ac.id/id/eprint/44789

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