Cendekiawan, Vikry (2016) Studi Komparasi Perilaku Gerak FLNG Masela Terhadap Sistem Tambat Spread Mooring Dengan Konfigurasi Spread dan Group(Bundle)”. Undergraduate thesis, Institut Technology Sepuluh Nopember.
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Abstract
Sistem tambat Spread mooring yang digunakan pada suatu struktur
terapung akan berdampak pada keterbatasan kemampuan weathervaning kapal ,
keadaan tersebut mengakibatkan besarnya gaya yang diterima oleh kapal akan
sangat dipengaruhi oleh arah datang dari beban lingkungan serta penentuan lokasi
tali tambat pada kapal.Tugas akhir ini membahas tentang komparasi tension dan
perilaku gerak FLNG Masela terhadap sistem tambat Spread mooring dengan
konfigurasi tersebar merata dengan sudut 30o (Spread) dan tersebar pada empat
titik Group (Bundle) terhadap beban lingkungan dengan kondisi collinear dan
non-collinear. Analisis dilakukan dengan metode time domain simulation yang
dilakukan dengan software Ariane serta Hydrostar yang digunakan dalam
permodelan FLNG.Pada kondisi pembebanan collinear, beban arus, angin dan
gelombang datang dari arah yang sama, sedangkan pembebanan lingkungan
kondisi non-collinear dimodelkan dengan arah datang angin dan gelombang yang
berjarak 30o dari arah datang arus serta, arah datang dari arus, gelombang dan
angin yang membentuk sudut sebesar 30o, dari hasil analisis diketahui bahwa
pembebanan kondisi collinear memberikan tension dan motion yang lebih besar
dari kondisi non-collinear, serta diketahui bahwa konfigurasi Group memberikan
hasil tension dan motion yang lebih baik pada FLNG Masela
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A floating structure with spread mooring system will results in limitation of
weathervaning capability, that condition will caused the magnitude of force that
acting on the structure will be strongly influenced by direction of environmental
loads and the mooring lines fairlead’s position. This Final Project objective is
comparing mooring lines tension and FLNG Masela’s motion which is moored by
spread mooring with two configuration (Spread and Group) due to collinear and
non-collinear environmental loads condition. Spread configuration is modelled
consisting of 12 mooring lines which is located arround the FLNG at 30o interval,
Group configuration is arranged in 4 groups of 3 lines, with 2 groups is located at
the bow of the FLNG and two groups at the stern.The Analyses done by using
Ariane 8 software to performed time domain analysis and, Hydrostar software to
create the computation model and also calculate the FLNG’s hydrostatics and
hydrodynamics properties. The collinear environment for the floating structure is
caused by the combination of wave, wind and current move towards to floating
structure in one direction only or is called as in-phase, which is move in one angle
only. But in the non-collinear environment, the wind, wave and current move
towards floating structure in different direction of angle. From the analysis, Group
configuration provide smaller mooring lines tension magnitude and offset
compared to Spread configuration, It also shows the collinear environmetal loads
condition generate greater impact to mooring lines tension and FLNG offset
compared to non-collinear environmental condition.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 627.32 Cen s |
| Uncontrolled Keywords: | FLNG, Spread Mooring, Collinear, Non-Collinear |
| Subjects: | V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 10 Jan 2020 08:28 |
| Last Modified: | 10 Jan 2020 08:28 |
| URI: | http://repository.its.ac.id/id/eprint/72631 |
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