Dhurandoro, Giovani Lintang (2019) Analisa Perencangan Sistem dan Peralatan untuk Pengangkatan dan Pembalikan Block SS1A Kapal Cepat Rudal 60 Meter. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pada proses pembangunan kapal dengan menggunakan sistem block, memungkinkan untuk melakukan pembangunan kapal dengan efisien. Dimana kapal dibagi menjadi beberapa block. Lalu pekerjaan block tersebut apabila memiliki kontur yang rumit dapat dilakukan proses pekerjaan dengan block terbalik sehingga dapat lebih efisien serta mengurangi pekerjaan overhead welding. Dengan proses pekerjaan block terbalik, maka perlu dilakukan proses turning yaitu proses pembalikan block kembali seperti semula, serta proses Lifting yaitu suatu proses pengangkatan block kapal secara normal baik pengangkatan secara horizontal maupun vertical pada saat proses erection. Diketahui block SS1A memiliki berat 12,47 ton serta memiliki titik berat X = 4447,62 (Fr. 28-226,52), Y = 0, Z = 824,13 mm (above BL). Bedasarkan titik berat maka ditentukan lift point Side girder 1800 from CL PS, Side girder 1800 from CL SB, frame 30, frame 25. Pengangkatan block menggunakan 2 Crane double girder x 2 Hook dengan kapasitas 16 ton. Sementara itu, Untuk perancangan lifting equipment yang digunakan menggunakan sling dengan panjang 4 meter dengan kapasitas 4 ton untuk lifting maupun turning , dan 15 ton untuk hanging. Untuk shackles menggunakan shackles dengan WWL 6,5 ton untuk lifting maupun turning, dan 8,5 ton untuk hanging. Sementara itu, untuk untuk lifting eyes menggunakan type 1-6 dan bracket 6334/048 untuk lifting maupun turning, dan lifting eyes menggunakan type 1-12 dan bracket 6334/046 untuk turning dan hanging. Dalam perencanaan lifting eyes dan bracket dilakukan permodelan dan simulasi dengan memberi variasi terhadap arah dan sudut pemasangan, dimana dari hasil simulasi menunjukan arah dan sudut pemasangan lifting eyes mempengaruhi terhadap stress serta nilai kemananan dalam melakukan lifting maupun turning. Dari hasil simulasi, untuk perencanaan pada bagian bottom , lifting eyes dan bracket dipasang pada frame 25 searah melintang badan kapal dengan factor of safety sebesar 5,11 pada kondisi lifting before turning. sedangkan pada frame 30, lifting eyes dipasang searah memanjang badan kapal dengan factor of safety sebesar 1,74 pada kondisi lifting before turning dan 1,742 pada kondisi turning. Lalu , untuk perencanaan pada bagian deck, lifting eyes dan bracket dipasang pada frame 25 dengan sudut 63,43º yang digunakan pada kondisi turning (factor of safety 2,32), hanging (factor of safety 1,16), maupun lifting after turning (factor of safety 8,832). Sedangkan pada frame 30, lifting eyes dipasang dengan sudut 63,43º yang digunakan pada kondisi turning (factor of safety 1,758), dan lifting after turning (factor of safety 5,390) Bedasarkan lifting clearance, block dapat diangkat dan dibalik dengan aman dengan jarak lifting 5975 mm dan hanging sebesar 2535 mm.
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In the process of building ships using a block system, it is possible to efficiently construct vessels. Where the ship is divided into several blocks. Then the blockwork, if it has a complicated contour, can be done by reverse the blockwork process so that it can be more efficient and reduce overhead welding work. With the blockwork process reversed, it is necessary to do a turning process that is the process of reversing the block back to normal position, and the Lifting process, which is a process of lifting the ship block normally both horizontally and vertically during the erection process. SS1A block has a weight of 12.47 tons and has a center of gravity X = 4447,62 (Fr. 28-226,52), Y = 0, Z = 824,13 mm (above BL). Based on center of gravity, lift point is determined on the Side girder 1800 from CL PS, Side girder 1800 from CL SB, frame 30, frame 25. Lifting block uses 2 double girder x 2 Hook cranes with a capacity of 16 tons. Meanwhile, the lifting equipment design used uses a 4-meter long sling with a capacity of 4 tons for lifting and turning, and 15 tons for hanging. For shackles use shackles with WWL 6.5 tons for lifting and turning, and 8.5 tons for hanging. Meanwhile, for lifting eyes using type 1-6 and bracket 6334/048 for lifting and turning, and lifting eyes using type 1-12 and bracket 6334/046 for turning and hanging. In planning lifting eyes and brackets modeling and simulation are done by giving variations on the direction and angle of installation, wherefrom the simulation results show the direction and angle of installation of lifting eyes affect stress and the security value of lifting and turning. From the simulation results, for planning on the bottom, lifting eyes and brackets are installed on frame 25 in a transverse direction with a factor of safety of 5.11 in the condition of lifting before turning. while at frame 30, the lifting eyes are installed in a longitudinal direction with a factor of safety of 1.74 in conditions of lifting before turning and 1.742 in turning conditions. Then, for planning on the deck, lifting eyes and brackets are mounted on frame 25 with an angle of 63.43º which is used in turning conditions (factor of safety 2,32), hanging (factor of safety 1,16), and lifting after turning (factor of safety 8,832) While at frame 30, the lifting eyes are installed at an angle of 63.43º which is used in turning conditions (factor of safety 1,758), and lifting after turning (factor of safety 5,390). Based on lifting clearance, the block can be lifted and turned safely with lifting distance 5975 mm and hanging is 2535 mm.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSSP 623.881 Dhu a-1 2019 |
| Uncontrolled Keywords: | Block, Lift Point, Lift Equipment, Lifting Eyes, Bracket, Sudut, Stress, Factor of Safety, Lifting Clearance. |
| Subjects: | T Technology > T Technology (General) > T57.62 Simulation T Technology > T Technology (General) > T58.8 Productivity. Efficiency T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Giovani Lintang Dhurandoro |
| Date Deposited: | 31 May 2024 01:42 |
| Last Modified: | 31 May 2024 01:42 |
| URI: | http://repository.its.ac.id/id/eprint/68994 |
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