Desain dan Analisis Kekuatan Struktur Model Seastation Aquaculture Untuk Perairan Laut Lepas di Indonesia

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. =================================================================== 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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