Ariviana, Vilda (2017) Desain dan Analisis Kekuatan Struktur Model Seastation Aquaculture Untuk Perairan Laut Lepas di Indonesia. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dalam tugas akhir ini penulis mendesain dan menganalisis kekuatan struktur model SeaStation Aquaculture untuk budidaya ikan Yellowfin Tuna. Desain dan analisis ini dilakukan untuk mendapatkan dimensi yang tepat dengan mempertimbangkan tegangan maksimal yang bekerja pada struktur dan umur kelelahan struktur. Penelitian dimulai dengan menentukan ukuran struktur yang akan dibuat dengan mempertimbangkan banyaknya ikan yang akan dibudidaya nantinya. Selanjutnya melakukan analisis pergerakan struktur SeaStation akibat beban lingkungan dalam keadaan free floating dan tertambat untuk mendapatkan besar tension mooring line. Setelah itu dilakukan analisis global dengan memasukkan beban tension yang mengenai struktur dari tali tambat untuk mendapatkan besar tegangan yang diterima struktur. Setelah itu dilakukan perhitungan stress range dan menghitung Cumulative Damage menggunakan metode deterministik dan S-N Curve. Dari hasil permodelan numerik yang dilakukan, didapatkan bahwa perilaku gerak terbesar pada SeaStation yaitu sebesar 2,15 m/m untuk gerakan surge saat kondisi operasi dan 5,81 deg/m untuk gerakan roll kondisi operasi. Untuk hasil tension terbesar pada mooring line yaitu 979,31 kN pada heading 45o dengan safety factor 2,28. Setelah itu didapatkan tegangan maksimum pada struktur SeaStation sebesar 211.05 MPa. Berdasarkan tegangan maksimum tersebut umur kelelahan struktur SeaStation yaitu 28 tahun selama umur operasi.
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In this final project, the authors designed
and ana
lyzed structural
strength of
SeaStation Aquaculture
Cage
for Yellowfin Tuna. Design and analysis is performed
to obtain the right dimensions by considering the maximum stress on the structure
and fatigue life of the structure. This research begins by determining the size of the
structure to be made by consideri
ng the number of fish to be cultivated. Next steps is
motion analysis of the SeaStation structure due to the environmental load in free
floating and moored condition to obtain a large tension mooring line. As well as the
maximum tension of mooring line bas
ed on the environmental load, the global
structure analysis of SeaStation structure was perfomed. The results have to comply
wit
h the requirement of ABS rules. Fatigue analysis by
deterministic approach
was
ap
plied using to S
-
N Curve method.
Based on numer
ical modeling, it is known that
the maximum motion on SeaStation is
2.15
m/m
for
surge
at operation conditions and
5.81
deg
/m for
pitch
at operation conditions. Based on the simulation carried out to
obtain the maximum tension on the mooring line is
979
.31
kN at heading
45
°
with
safety factor
2.28
.
The maximum stress obtained on the structure of the SeaStation of
211.05
MPa
. Based on the maximum stress, the fatigue life of the SeaStation structure
is
2
8
years during operation time.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Aquaculture, Cage Design, Deterministic Approach, Maximum Principal Stress, Stress Range, SeaStation, Von-Mises Stress. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Vilda Ariviana . |
| Date Deposited: | 19 Jan 2018 07:59 |
| Last Modified: | 08 Mar 2019 06:26 |
| URI: | http://repository.its.ac.id/id/eprint/45138 |
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