Studi Eksperimen Dan Numeris Roll Damping Struktur Floating Crane Catamaran Pada Kondisi Free Floating Dan Tertambat

Aziz, Muhamad Fadkhurrohman (2020) Studi Eksperimen Dan Numeris Roll Damping Struktur Floating Crane Catamaran Pada Kondisi Free Floating Dan Tertambat. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tugas akhir ini membahas terkait dengan studi eksperimen free decay test gerak roll pada struktur floating crane catamaran yang ditinjau dari kondisi free floating dan tertambat. Eksperimen dilakukan pada fasilitas Maneuvering and Ocean Engineering Basin (MOB) milik Balai Teknologi Hidrodinamika – BPPT. Struktur yang digunakan sebagai eksperimen merupakan model floating crane catamaran dengan skala 1:36. Pada saat pengujian digunakan sistem horizontal taut mooring dengan konfigurasi 8 tali tambat yang dipasang pada 4 titik fairled. Dari pemodelan sistem tambat eksperimen, kekakuan pegas digunakan sebagai acuan pemodelan tali tambat pada analisis numeris. Analisis yang dilakukan pada tugas akhir ini adalah membandingkan hasil eksperimen uji decay dengan hasil analisis menggunakan software Moses. Dari hasil eksperimen didapatkan perbandingan kondisi free floating terhadap tertambat untuk masing-masing uji decay sebesar 38%, 8%, dan 9% untuk nilai linear damping, kemudian 93%, 12% dan 13% untuk nilai kuadratik damping. Perbandingan hasil eksperimen terhadap hasil numeris didapatkan perbedaan paling besar untuk uji decay 1 terhadap numeris terdapat pada nilai kuadratik damping untuk kondisi free floating sebesar 128.39%, kemudian pada uji decay 2 dan uji decay 3 terhadap numeris didapatkan perbedaan paling besar pada nilai linear damping kondisi tertambat yaitu sebesar 60.80% dan 66.83%. ==================================================================================================================== This final project discusses the experimental study of the free decay test of roll motion on the catamaran floating crane structure in terms of free floating and moored conditions. Experiments were carried out at the Maneuvering and Ocean Engineering Basin (MOB) facility owned by the Hydrodynamics Technology Center - BPPT. The structure used as an experiment is a catamaran floating crane model with a scale of 1:36. At the time of testing, a horizontal mooring line system was used with a configuration of 8 mooring ropes installed at 4 fairled points. From the experimental mooring system modeling, spring stiffness is used as a reference for mooring rope modeling in numerical analysis. The analysis carried out in this final project is to compare the experimental results of the decay test with the results of the analysis using Moses software. From the experimental results, the comparison of free floating to moored conditions for each decay test was 38%, 8%, and 9% for the linear damping value, then 93%, 12% and 13% for the damping quadratic value. Comparison of experimental results to numerical results obtained the greatest difference for the decay 1 test against the numerical found in the damping quadratic value for free floating conditions of 128.39%, then in the decay 2 test and the decay 3 test on numerical the greatest difference was the linear damping value of the moored condition namely 60.80% and 66.83%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: floating crane catamaran, roll damping, linear damping, kuadratik damping, catamaran floating crane, roll damping, linear damping, quadratic damping
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Muhamad Fadkhurrohman Aziz
Date Deposited: 27 Aug 2020 01:03
Last Modified: 27 Aug 2020 01:03
URI: https://repository.its.ac.id/id/eprint/78666

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