Article Per Year (5 Year)
p-Index From 2021 - 2026
1.037
P-Index
This Author published in this journals
All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Archipelago Engineering ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Impresi Indonesia
Dedy Wahyudi
Departemen Teknik Perkapalan, Universitas Muhammadiyah Surabaya
Religion Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Transportation

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
ANALISIS NUMERIK PENGARUH KECEPATAN TERHADAP SEAKEEPING KAPAL PATROLI PADA DAERAH PELAYARAN SEASTATE 7 Mohammad Taufik Ar Rozi; Betty Ariani; Dedy Wahyudi
ALE Proceeding Vol 4 (2021): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.4.2021.13-17

Abstract

Patrol boat is designed not to be slow in its movement on the water surface. To be able to move quickly and agilely, the most important requirement for this type of ship is in its maneuverability. The ship's motion at sea (seakeeping) is influenced by several things, speed, body shape, and the direction of the ship's heading waves. In this study, we analyze the six degrees of freedom, especially on the response of the ship's vertical movement, namely rolling on the sea waves of Seastate 7, especially in extreme weather in the South China Sea. The standard limit used is NORDFORSK 1987 with Light Manual Work Criteria. By entering parameters such as variations in speed and wave angle, such as 0°, 45°, 180° and 270°, then from the graph it can be seen the critical value for each movement. The calculation is carried out with the help of computational software Maxsurf Motions Advanced 20 V8i. The results of this study are the maximum roll movement value that occurs at a speed of 14 knots with a wave angle of 45° with a roll angle value of 6.40o. Furthermore, there is a decrease in the value of the movement along with the increase in the speed of the ship. The minimum roll value occurs when the wave angle is 270° when the ship's speed is 28 knots with a value of 5.69o.
Numerical Investigation of the Effect of Biodiesel-Biogas Percentage on Performance Characters and Dual Fuel Engine Emissions as Green Technology on Ship Betty Ariani; Dedy Wahyudi
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 19, No 1 (2022): February
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v19i1.44125

Abstract

The discourse on the application of green technology in the maritime sector is an interesting agenda to implement. The development of the world of shipping transportation which continues to experience an increase in numbers and services creates new problems in terms of fuel supply and the resulting emissions. So that the development of innovation and technology for ship machinery should be directly related to fossil fuel substitution technology, operational efficiency technology, improving performance and reducing emissions from the engine itself to be achievements and targets. Good engine performance directly has an impact on increasing the operational efficiency of the ship and being a good carrying capacity in the environment with minimal emission levels. A dual-fuel engine is one of the engine system concepts that has several advantages, such as simple and relatively easy modifications and the use of natural gas which tends to be cleaner. Biodiesel and biogas are examples of alternative fuels that are expected to be promising solutions for marine engineering. This research uses a numerical study on the application of dual fuel engines, the percentage of biodiesel-biogas is carried out with variations of 50:50 and 25:75, at a constant engine speed of 2200 RPM. Simulations were carried out to see the results of how the engine performance, cylinder pressure, heat release rate and HC and NOx emissions were at a constant speed variation of the fuel percentage test NOx emission decreased at a higher biogas percentage, for UHC it increased at a higher biogas percentage, it is possible to add oxygen intake through a turbocharger or supercharger as an auxiliary equipment.
Studi Komparatif Variasi Ketebalan Pelat Baja ASTM A36 pada Main Steel sebagai Penopang Baterai Rofiqah Sabila Hidayat Hidayat; Muhaji; Dedy Wahyudi; Ardan Nagra Coutsar; Dian Prasetyawati
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.10995

Abstract

This simulation aims to conduct a comparative study of variations in the thickness of ASTM A36 steel plates to determine the most optimal thickness for supporting the load of batteries, which are currently a critical energy source. The analysis focuses on the values of von Mises stress, displacement, and safety factor. Battery supports are the primary focus of this study, which will compare variations in optimal thickness for batteries that typically require thicknesses of up to 3 to 4 mm; in this simulation, a thinner and optimal solution will be sought. As technology advances and the demands of manufacturing digitalization grow, production processes are increasingly utilizing simulations in Computer-Aided Engineering (CAE) software, making conventional testing more efficient. Using SolidWorks software simulation, a static analysis was conducted to evaluate each variation. ASTM A36 steel plates measuring 1400 mm in length, 70.6 mm in width, and with thicknesses of 1 mm, 2 mm, and 3 mm were selected to accommodate the battery weight. Three battery blocks, each weighing 5 kg, were used in this simulation. ASTM A36 material was selected because it has a high yield strength of 250 MPa. In addition to the parameters mentioned above, dynamic loads with variations of 1.5G and 2G will also be calculated. The optimal strength of the battery mount was determined through simulation in SolidWorks. The results of each thickness variation were then analyzed using a comparative study to determine the optimal thickness based on a comparison of von Mises stress, displacement, and safety factor. Ultimately, the optimal thickness was determined to be 3 mm, with von Mises stress reduced by 32.8% to 82 MPa. Displacement was reduced by 1.08% compared to the two previous variations, specifically 12 mm at the center of the plate. The optimal dynamic load stress occurs at a thickness of 3 mm.
Penerapan Formal Safety Assessment (FSA) untuk Penilaian Risiko Kecelakaan Kapal di Alur Pelayaran Barat Surabaya Dian Prasetyawati; Dedy Wahyudi; Muhammad Aris Setiawan
Jurnal Impresi Indonesia Vol. 5 No. 7 (2026): Jurnal Impresi Indonesia
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jii.v5i7.7994

Abstract

Alur Pelayaran Barat Surabaya (APBS) merupakan alur pelayaran strategis dengan kepadatan lalu lintas kapal yang tinggi sehingga memiliki potensi risiko kecel-akaan yang signifikan. Penelitian ini bertujuan untuk menganalisis risiko kecel-akaan kapal dan merumuskan upaya peningkatan keselamatan pelayaran di APBS pada periode 2020–2024 dengan menggunakan metode Formal Safety Assessment (FSA) yang meliputi identifikasi bahaya, analisis risiko, perumusan Risk Control Options (RCO), evaluasi efektivitas RCO, serta Cost–Benefit Assessment (CBA). Data penelitian diperoleh dari data kecelakaan kapal, hasil kuesioner, dan regulasi keselamatan pelayaran. Hasil penelitian menunjukkan bahwa kecelakaan collision merupakan jenis kecelakaan yang paling dominan, diikuti sinking dan fire. Ber-dasarkan analisis FSA, collision berada pada kategori Very High Risk, sinking pada High Risk, dan fire pada Low Risk. Tujuh RCO dirumuskan untuk menurunkan tingkat risiko tersebut yaitu optimalisasi peran aktif VTS dalam pengaturan lalu lintas kapal dan peringatan dini konflik lintasan, peningkatan kompetensi perwira jaga melalui pelatihan Bridge Resource Management dan manajemen kelelahan, reposisi dan peningkatan kualitas SBNP pada segmen kritis, peningkatan pengawasan stabilitas kapal dan manajemen muatan sebelum dan selama pe-layaran, peningkatan kesiapan keselamatan kapal melalui pemeriksaan LSA dan emergency drill rutin, peningkatan inspeksi dan perawatan sistem mesin dan in-stalasi listrik kapal, peningkatan kompetensi awak kapal dalam pencegahan dan penanganan kebakaran awal (Advanced Fire Fighting) dan hasil CBA menunjuk-kan seluruh RCO memiliki nilai Benefit–Cost Ratio (BCR) ? 2 sehingga dikate-gorikan sangat layak. Penerapan RCO secara terintegrasi diharapkan mampu menurunkan risiko kecelakaan hingga tingkat As Low As Reasonably Practicable (ALARP).
The Effect of Speed On Bow Thruster Tunnel Acoustics Using Computational Fluid Dynamics Methods Dedy Wahyudi; Ardan Nagra Coutsar; Dian Prasetyawati; Putro Adi Nugroho
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 22, No 1 (2025): February
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v22i1.69453

Abstract

The increasing global emphasis on sustainability and environmental conservation has driven the maritime industry to adopt technologies aimed at minimizing ecological impacts, particularly underwater noise pollution. As a significant environmental issue, underwater noise affects marine ecosystems, altering the behavior, physiology, and survival of marine fauna, while contributing to broader ecological shifts. This research investigates the acoustic properties of a vessel's bow thruster tunnel, focusing on noise generation at varying operational speeds. The study utilizes Computational Fluid Dynamics (CFD) simulations with ANSYS Fluent to analyze the relationship between fluid flow and acoustic behavior within the tunnel. Simulations conducted using CFD ANSYS Fluent reveal that high acoustic concentrations occur at the tunnel due to significant pressure differences between the interior and exterior. Results show that acoustic levels increase with ship velocity, ranging from 81.39 dB at 10 knots to 108.86 dB at 28 knots. To mitigate noise, a cone ring inlet design is proposed to reduce pressure differences and the ship's acoustic signature. These findings underscore the importance of vessel speed in influencing underwater noise levels, which can affect operational efficiency, marine ecosystems, and ship performance. The study highlights the need for a multi-faceted approach, incorporating hull design, propulsion systems, and operational strategies, to minimize acoustic impacts and promote sustainable maritime practices.
Co-Authors Ardan Nagra Coutsar Ardan Nagra Coutsar Betty Ariani Dian Prasetyawati Dian Prasetyawati Dian Prasetyawati Mohammad Taufik Ar Rozi Muhaji Muhammad Aris Setiawan Putro Adi Nugroho Rofiqah Sabila Hidayat Hidayat