Studi Komparasi Perilaku Gerak FLNG Masela Terhadap Sistem Tambat Spread Mooring Dengan Konfigurasi Spread dan Group(Bundle)”

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 ======================================================================================================= 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: https://repository.its.ac.id/id/eprint/72631

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