Yansah, Achmad Rizky (2016) Analisis Konfigurasi Rigging Dan Padeye Pada Saat Proses Installation Deck Structure Ul.A Platform Dengan Cara Lifting. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Instalasi deck structure dengan metode Lifting adalah kegiatan memindahkan ataupun
pengangkatan suatu barang (komponen anjungan lepas pantai) dengan bantuan crane ataupun
crane vessels. Dalam tugas akhir ini dilakukan analisis tegangan dari variasi desain rigging untuk
menghasilkan gaya sling dan unity check paling minimum. Variasi desain rigging meliputi tanpa
spreader bar, satu spreader bar, dua spreader bar, dan spreader frame. Dari hasil running SACS
5.7 spreader frame mendapatkan nilai sling force 453,3826 kips dan unity check 0,465, sehingga
nilai sling force dari speader frame digunakan untuk analisis tegangan pada struktur padeye
dengan software ANSYS Workbench. Selanjutnya, sling force digunakan untuk analisis tegangan
struktur padeye. Hasil dari ANSYS Workbench didapatkan tegangan von-mises pada padeye
koneksi 80,32 MPa, shear stress sebesar 30,034 MPa, dan deformation maksimal sebesar 0,23581
mm. Untuk pemodelan hanya dilakukan pada desain spreader frame karena menghasilkan
tegangan paling minimum. Untuk mendukung operasi instalasi dengan metode lifting, diperlukan
juga analisis stabilitas dan ballasting pada crane vessel dengan software moses v.7. Hasil dari
software Moses v.7 didapatkan stabilitas sudah memenuhi standar dari international maritime
organization (IMO). Sedangkan untuk analisis ballasting dengan setiap tangki terdapat pompa
maka hanya diperlukan waktu 23,07 menit dengan volume ballast sebesar 3845,76 m3 pada step
kedua dan ketiga. Sedangkan untuk step keempat ballasting memerlukan waktu 24,87 menit
dengan pengurangan volume ballast 4145,67 m3
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Installation of deck structure with Lifting method is transferring the activities or the removal of an
item (a component of offshore platforms) with the help of cranes or crane vessels. In this final task
performed stress analysis of rigging design variations to produce sling force and unity check
minimum. Rigging design variations include no spreader bars, one spreader bar, two spreader bars,
and the spreader frame. From the results of running SACS 5.7 spreader frames to get the value of
sling force 453.3826 kips and unity check 0.465, so the value sling force of speader frame is used
for stress analysis on the structure padeye with ANSYS Workbench. Furthermore, sling force used
for stress analysis padeye structure. The results obtained from the ANSYS Workbench von-mises
stress in connection padeye 80.32 MPa, shear stress of 30.034 MPa, and a maximum deformation
of 0.23581 mm. For the modeling is only done on the spreader frame design for produce the
minimum stress. To support the operation of the installation with a lifting method, also required
the analysis of stability and ballasting the crane vessel with software Moses v.7. The results of the
software Moses v.7 obtained stability to meet the standard of international maritime organization
(IMO). The results of the Moses software v.7 stability obtained fulfill the standard criteria of
international maritime organization (IMO). While for analysis to ballasting with each tank of the
pump contained only takes 23.07 minutes with ballast volume amounted to 3845.76 m3 in the
second and third step. While for the fourth step ballasting takes 24.87 minutes with a reduction in
the volume of ballast 4145.67 m3
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKe 623.862 Yan a |
| Uncontrolled Keywords: | deck structure, , lifting, crane vessels, padeye |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 29 May 2020 01:45 |
| Last Modified: | 29 May 2020 01:49 |
| URI: | http://repository.its.ac.id/id/eprint/76051 |
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