Analisis Perbandingan Kekuatan Buckling Pilar Tubular Dan I-Beam Pada Geladak Kendaraan Kapal Ferry Ro-Ro

Prastianti, Aurelia Alvina (2026) Analisis Perbandingan Kekuatan Buckling Pilar Tubular Dan I-Beam Pada Geladak Kendaraan Kapal Ferry Ro-Ro. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Geladak kendaraan merupakan komponen struktural kritis pada kapal Roll-on/Roll-off (Ro-Ro) yang berfungsi untuk menahan beban statis dan dinamis muatan kendaraan. Penelitian ini bertujuan untuk menganalisis dan membandingkan efektivitas pilar berpenampang I-beam dan tubular dalam menahan beban tekan aksial serta potensi kegagalan tekuk (buckling). Analisis dilakukan secara numerik menggunakan Metode Elemen Hingga (Finite Element Method/FEM) terhadap empat variasi profil, yaitu Variasi 1 (I 300 × 120 × 10 × 10 mm), Variasi 2 (I 300 × 150 × 7 × 11 mm), Variasi 3 (Tubular Ø168,3 × 10,97 mm), dan Variasi 4 (Tubular Ø219,1 × 8,18 mm). Kekuatan struktur dievaluasi berdasarkan distribusi tegangan ekuivalen von Mises, deformasi total, berat konstruksi, dan kapasitas beban kritis tekuk. Pengambilan keputusan menggunakan metode Analytic Hierarchy Process (AHP) untuk menilai hasil analisis global dan lokal berdasarkan kriteria tegangan, deformasi, dan berat. Hasil simulasi menunjukkan bahwa seluruh variasi memiliki tegangan maksimum yang masih berada di bawah tegangan izin sebesar 175 MPa. Pada analisis global, Variasi 3 memperoleh skor AHP tertinggi sebesar 4,352 karena memberikan kombinasi terbaik antara deformasi global yang rendah (0,777 mm) dan efisiensi berat struktur (245,77 ton). Pada analisis lokal, Variasi 2 memperoleh skor AHP tertinggi sebesar 4,770 dengan konsentrasi tegangan lokal terendah sebesar 13,958 MPa. Namun, berdasarkan evaluasi kekuatan tekuk (buckling), Variasi 3 memiliki kapasitas beban kritis sebesar 178,25 ton, lebih tinggi dibandingkan Variasi 2 yang hanya mencapai 155,17 ton. Oleh karena itu, Variasi 3 (Tubular Ø168,3 × 10,97 mm) ditetapkan sebagai konfigurasi pilar yang paling optimum karena memiliki ketahanan terhadap buckling yang lebih baik, distribusi beban yang lebih merata, serta keseimbangan terbaik antara kekuatan, kekakuan, dan efisiensi massa struktur.
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The car deck is a critical structural component of a Roll-on/Roll-off (Ro-Ro) ferry designed to withstand the static and dynamic loads imposed by vehicles. This study aims to analyze and compare the effectiveness of I-beam and tubular pillars in resisting axial compressive loads and preventing buckling failure. Numerical analysis was performed using the Finite Element Method (FEM) on four pillar configurations: Variation 1 (I 300 × 120 × 10 × 10 mm), Variation 2 (I 300 × 150 × 7 × 11 mm), Variation 3 (Tubular Ø168.3 × 10.97 mm), and Variation 4 (Tubular Ø219.1 × 8.18 mm). Structural performance was evaluated based on the von Mises equivalent stress distribution, total deformation, structural weight, and critical buckling load. The Analytic Hierarchy Process (AHP) was employed to assess the global and local analysis results using stress, deformation, and weight as evaluation criteria. The simulation results indicate that all pillar configurations produced maximum stresses below the allowable stress of 175 MPa, demonstrating adequate structural safety. In the global analysis, Variation 3 achieved the highest AHP score of 4.352 by providing the best combination of low global deformation (0.777 mm) and structural weight efficiency (245.77 tons). In the local analysis, Variation 2 obtained the highest AHP score of 4.770 due to its lowest local stress concentration of 13.958 MPa. However, based on the buckling performance, Variation 3 exhibited a higher critical buckling load of 178.25 tons compared to Variation 2, which reached only 155.17 tons. Therefore, Variation 3 (Tubular Ø168.3 × 10.97 mm) was identified as the optimum pillar configuration because it provides superior buckling resistance, a more uniform load distribution, and the best balance between structural strength, stiffness, and weight efficiency.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Metode Elemen Hingga, buckling, pilar, I-beam, tubular, Analytical Hierarchy Process, Finite Element Method, buckling, pillar, I-beam, tubular, Analytical Hierarchy Process
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM163 Hulls (Naval architecture)
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	Aurelia Alvina Prastianti
Date Deposited:	04 Aug 2026 07:11
Last Modified:	04 Aug 2026 07:11
URI:	http://repository.its.ac.id/id/eprint/143431

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