Rafi'i, Mochamad Hanif (2020) Studi Eksperimen dan Analisis Numeris Tegangan Sistem Tambat Floating Crane Catamaran pada Kondisi Intact Dan Damage Berbasis Ranah Waktu (Time-Domain). Other thesis, Institute Teknologi Sepuluh Nopember.
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Abstract
Tugas akhir ini membahas tegangan sistem tambat floating crane catamaran pada kondisi intact dan damaged dengan menggunakan metode eksperimen dan pemodelan numeris. Studi eksperimen dilakukan di Kolam MOB (Maneuvering Ocean Basin) Balai Teknologi Hidrodinamika BTH-BPPT. Tegangan tali tambat studi eksperimen diolah menggunakan pendekatan frequency domain dengan menghitung stokastik low frequency tension dan wave frequency tension. Tegangan tali tambat maksimum studi eksperimen dan numeris pada skenario pembebanan arah 90º (beamseas), intact, Hs = 2,5 m sebesar 373,7 kN dan 441.6 kN. Pada skenario intact Hs 6.37 m sebesar 565,6 kN dan 1741.5 kN. Pada skenario damaged Hs 6.37 m sebesar 863,9 kN dan 2113.3 kN. Perbedaan tegangan diakibatkan oleh perbedaan kekakuan sistem tambat eksperimen (taut horizontal) dan numeris (catenary). Pada kondisi tali tambat intact dengan beban gelombang signifikan 6.37m, heading 0, 45, 90, 135, 180, semua kondisi memenuhi kriteria mooring safety factor API RP 2SK (>1.67) dengan rincian nilai mooring safety factor heading 0 sebesar 20.7; heading 45 sebesar 9.51; heading 90 sebesar 5.87; heading 135 sebesar 7.71; heading 180 sebesar 22.2. Pada kondisi tali tambat damaged juga masih memenuhi kriteria mooring safety factor API RP 2SK (>1.25) dengan nilai 4.83.
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This final project discusses about mooring tension of catamaran floating crane in intact and damaged conditions using experimental and numerical methods. The experimental study was carried out in the MOB (Maneuvering Ocean Basin) BTH-BPPT (Hydrodynamics Technology Center). Experimental mooring tension are processed using the frequency domain approach with low frequency tension and wave frequency tension breakdown. Maximum mooring tension of experimental and numerical studies in wave heading 90º (beamseas) for intact condition with Hs = 2.5 m is 373.7 kN and 441.6 kN. In intact with Hs = 6.37 m is 565.6 kN and 1741.5 kN. In the damaged condition with Hs = 6.37 m is 863.9 kN and 2113.3 kN. The difference of the experimental and numerical mooring tension is due to the difference in mooring system stiffness. In the intact mooring conditions with 6.37 m significant wave load, for headings 0, 45, 90, 135, 180, all conditions meet the API mooring safety factor criteria API RP 2SK (> 1.67) with detailed heading 0 of 20.7; heading 45 of 9.51; heading 90 of 5.87; heading 135 of 7.71; heading 180 of 22.2. The damaged mooring condition also meets the API RP 2SK mooring safety factor criteria (> 1.25) with a value of 4.83.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Floating crane catamaran, Tegangan Sistem Tambat, Mooring tension, Intact, Damaged |
| Subjects: | V Naval Science > VK > VK361 Mooring of ships. Dry docks V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM297 Ships Designs and drawings V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM311 Catamarans. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Mochamad Hanif Rafi'i |
| Date Deposited: | 22 Aug 2020 01:53 |
| Last Modified: | 22 Nov 2023 01:32 |
| URI: | http://repository.its.ac.id/id/eprint/80070 |
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