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All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Civil Engineering Journal
Muttaqie, Teguh
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Environmental Science

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Investigasi Dampak Insiden Tubrukan Terhadap Respon Struktur Kapal Penumpang Antar Pulau Prabowo,, Aditya Rio; Muttaqie, Teguh; Sohn, Jung Min; Bae, Dong Myung
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 15, No 2 (2018): Juni
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1362.572 KB) | DOI: 10.14710/kpl.v15i2.18623

Abstract

Tujuan dari penelitian ini adalah untuk menginvestigasi dampak dari tubrukan pada struktur kapal, dan mengkuantifikasi respon yang dihasilkan oleh struktur lambung ganda. Kasus yang diaplikasikan pada penelitian didesain berdasarkan insiden tubrukan antara Roll on-Roll off (Ro-Ro) Marisa Nusantara dengan Reefer Qihang di Selat Sunda pada # Mei 2014. Analisa dari skenario tubrukan dilaksanakan menggunakan metode elemen hingga (FEM) untuk menghasilkan prediksi dari respon kapal Ro-Ro ketika mengalami tubrukan. Untuk mendapatkan konfigurasi dan setting yang akurat, hasil analisa FEM dibandingkan dengan kalkulasi rumus empiris energi tubrukan. Studi dilanjutkan dengan menganalisa respon struktur dengan memvariasikan internal dan eksternal parameter, yaitu lokasi tubrukan dan material lambung. Berdasarkan karakteristik energi pada lokasi yang telah ditentukan, beberapa target di wilayah after-end dapat disimpulkan sebagai titik kritis jika tubrukan terjadi di pada lokasi ini. Di lain pihak, dengan mentukan target pada struktur dan konstruksi yang sama, penggunaan baja karbon menengah dapat memberikan hambatan struktur yang besar kepada striking ship ketika melakukan penetrasi pada lambung struck ship.
Analysis of Tetrachiral Sandwich Structures at High-Velocity Impact: Influence of the Applied Material and Projectile Core Geometry Maulana, Sultan; Prabowo, Aditya Rio; Wibowo, Wibowo; Do, Quang Thang; Muttaqie, Teguh; Muhayat, Nurul; Fitri, Siti Nurlita
Civil Engineering Journal Vol 10, No 10 (2024): October
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-10-017

Abstract

This research involved ballistic impact analysis on a tetrachiral sandwich structure in which the shapes of the circular nodes in the tetrachiral core are modified into polygonal shapes, namely a square, hexagon, and octagon. The objectives of this study were to observe the effect of a modified sandwich tetrachiral structure core, investigate the effect of the projectile geometry, and calculate the material performance of the structure. This research was conducted using numerical analysis utilizing the finite element method. The simulation methodology was validated through a benchmarking study, the results of which showed an error below 6%. The findings show that the material with the best performance was Armox 500T, at 5033 J. The most difficult projectile to withstand was conical, followed by ogive, hemispherical, and blunt. The results of the core modification on the tetrachiral sandwich structure show that the octagonal core had better energy absorption, by 2.8%, compared to the circular core. Modifying the node geometry in the tetrachiral core and then analyzing it with stress and strain contours are the novel aspects of this research. Doi: 10.28991/CEJ-2024-010-10-017 Full Text: PDF
ECONOMIC STUDY OF BLUE SWIMMING CRAB FISHING ACTIVITIES IN JAVA SEA USING ELECTRIC AND SAILING BOAT DESIGN Setiyobudi, Nanang; Santoso, Agoes; Purnamasari, Dian; Muttaqie, Teguh; Muryadin, Muryadin; Noor, Fariz; Setiawan, Ari; Wijaya Kusuma Rahadi, Cakra; Baidowi, Achmad; Rezvani, Rifki; Zarochman, Zarochman
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol. 15 No. 2 (2024): Marine Fisheries: Journal of Marine Fisheries Technology and Management
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jmf.v15i2.54018

Abstract

The United Nations has proclaimed the world's commitment to reducing greenhouse gas emissions in the Paris Agreement, and Indonesia has a net zero emissions target by 2060. One of the efforts to support this commitment is by applying environmentally friendly fishing vessel technology using sail and electric propulsion. However, to convince the application, it is necessary to consider several aspects, especially the economic aspect of business investment. This study aims to calculate the estimated cost of boatbuilding and fishing operations for 10 days in the Java Sea using the development of electric sailboat design. The payback period of a feasible investment is then calculated by comparing the revenue from Blue Swimming Crab (BSC) fishing activities. Based on the result, recognizing that with an investment value of nearly 400 thousand USD to purchase the boat, it is reasonable to set a minimum goal of capturing at least 1,2 Ton of crabs per trip, and a minimum of 20 trips annually, thus the payback period takes 10 years. Keywords: Blue swimming crab, Fishing vessel, Java Sea, Net zero emission, Payback period.
Structural design analysis of sandwich panels under axial compression load: Utilization of geometry and material variations Alifianto, Muhammad Daffa; Rohman, Hamdani Maftuh; Pratama, Anandito Adam; Istanto, Iwan; Prabowo, Aditya Rio; Melnyk, Oleksiy; Do, Quang Thang; Muttaqie, Teguh; Budiana, Eko Prasetya; Sohn, Jung Min; Wijaya, Rahman
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 22, No 3 (2025): Article in Progress (Accepted Papers)
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v22i3.75955

Abstract

This study aims to analyze the performance of sandwich cylindrical shell structures under axial compression load by varying the geometry and types of material. Numerical simulations were conducted using ABAQUS software, employing the finite element method (FEM) to evaluate von Mises stress, displacement, and energy absorption. The materials used include ASTM 1045, ASTM A36, and Mild Steel, with geometry designs varying across five different configurations. The simulation results indicate that the combination of material and geometry has a significant impact on the structural response of the sandwich cylindrical shell. ASTM 1045 exhibited the highest von Mises stress and displacement, indicating both high strength and substantial deformation, while Mild Steel demonstrated better elastic properties. Geometry 4 combined with ASTM 1045 proved to be the strongest configuration, while the combination of Geometry 1 and Mild Steel was the most elastic. This study contributes to the development of more efficient and impact-resistant ship structural designs. 
Co-Authors Achmad Baidowi, Achmad Aditya Rio Prabowo Agoes Santoso Alifianto, Muhammad Daffa Ari Setiawan Bae, Dong Myung Budiana, Eko Prasetya Dian Purnamasari Do, Quang Thang Fitri, Siti Nurlita Istanto, Iwan Maulana, Sultan Melnyk, Oleksiy Muryadin, Muryadin Noor, Fariz Nurul Muhayat Prabowo,, Aditya Rio Pratama, Anandito Adam Rezvani, Rifki Rohman, Hamdani Maftuh Setiyobudi, Nanang Sohn, Jung Min Wibowo Wibowo Wijaya Kusuma Rahadi, Cakra Wijaya, Rahman Zarochman, Zarochman