Waspandria, Danang Waspandria (2026) Studi Perbandingan Kekuatan Struktur Kapal Ikan 8 GT Berbahan Alumunium Dan Baja Tipis. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kapal ikan memerlukan struktur kuat dan aman untuk menahan beban operasional selama pelayaran. Pemilihan material konstruksi menjadi faktor penting yang memengaruhi kekuatan, kekakuan, dan keamanan struktur, khususnya pada kapal ikan 8 Gross Tonnage (GT) yang mendominasi armada perikanan skala kecil di Indonesia. Penelitian ini bertujuan membandingkan kekuatan struktur kapal ikan 8 GT berbahan Baja SS400 dan Aluminium AA5083 melalui metode elemen hingga (Finite Element Method). Analisis dilakukan menggunakan perangkat lunak ANSYS dengan model geometri, kondisi batas (boundary condition), dan pembebanan yang sama pada kedua material. Parameter yang dianalisis meliputi equivalent stress, total deformation, dan safety factor. Uji konvergensi mesh dilakukan terlebih dahulu, dengan ukuran elemen divariasikan dari 100 mm hingga 70 mm untuk Baja SS400 dan dari 150 mm hingga 136 mm untuk Aluminium AA5083. Hasil analisis menunjukkan Baja SS400 menghasilkan tegangan maksimum 87,892 MPa dan deformasi maksimum 1,199 mm dengan safety factor 2,788, sedangkan Aluminium AA5083 menghasilkan tegangan maksimum 102,360 MPa dan deformasi maksimum 6,624 mm dengan safety factor 2,100. Analisis momen lentur (bending moment) pada kondisi hogging dan sagging untuk Baja SS400 menghasilkan tegangan maksimum 81,521 MPa (safety factor 3,005) dan 94,204 MPa (safety factor 2,601), sehingga kondisi sagging menjadi kondisi yang lebih kritis. Kedua material memenuhi kriteria aman (safety factor > 1) sesuai standar klasifikasi maritim, namun Baja SS400 menunjukkan kinerja struktural lebih baik dan direkomendasikan sebagai material yang lebih optimal untuk konstruksi kapal ikan 8 GT.
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Fishing vessels require strong and reliable structural systems to withstand operational loads during service. Material selection affects the strength, stiffness, and safety of ship structures, particularly for 8 Gross Tonnage (GT) fishing vessels that dominate Indonesia's small-scale fishing fleet. This study compares the structural performance of an 8 GT fishing vessel built from SS400 steel and AA5083 aluminum using the Finite Element Method (FEM). The analysis was performed in ANSYS with identical geometry, boundary conditions, and loading for both materials. The evaluated parameters were equivalent stress, total deformation, and safety factor. A mesh convergence study was conducted first, varying element size from 100 mm to 70 mm for the SS400 steel model and from 150 mm to 136 mm for the AA5083 aluminum model. Results show SS400 steel produced a maximum stress of 87.892 MPa and a maximum deformation of 1.199 mm, with a safety factor of 2.788. AA5083 aluminum produced a maximum stress of 102.360 MPa and a maximum deformation of 6.624 mm, with a safety factor of 2.100. Both materials satisfy maritime classification safety standards (safety factor > 1), but SS400 steel shows better structural performance. SS400 steel is recommended as the more optimal material for 8 GT fishing vessel construction.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Metode Elemen Hingga, Aluminium AA5083, Baja SS400, Baja Tipis, Perbandingan Struktur, Finite Element Method (FEM), AA5083 Aluminum, SS400 Steel, Thin Steel, Structural Comparison. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA660.F7 Structural frames. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis |
| Depositing User: | Danang Waspandria |
| Date Deposited: | 05 Aug 2026 05:55 |
| Last Modified: | 05 Aug 2026 05:58 |
| URI: | http://repository.its.ac.id/id/eprint/144046 |
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