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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Ilmiah Wahana Pendidikan Jurnal Teknik Mesin, Industri, Elektro dan Informatika
Coutsar, Ardan Nagra
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Religion Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Social Sciences Transportation Other

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Analisis Tekanan Seal pada Rudder Stock Menggunakan Computational Fluid Dynamics (CFD) Wahyudi, Dedy; Coutsar, Ardan Nagra; Prasetyawati, Dian; Rizaly, Anastas
Jurnal Teknik Mesin, Industri, Elektro dan Informatika Vol. 4 No. 1 (2025): JURNAL TEKNIK MESIN, INDUSTRI, ELEKTRO DAN INFORMATIKA
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jtmei.v4i1.4710

Abstract

A ship is a type of floating structure that is specifically designed to move on the surface of sea water. This structure provides the ability for the ship to carry out various functions, from transporting goods, carrying passengers, to carrying out various other maritime operations. The advantage of a ship lies in its ability to move stably and efficiently in the midst of various dynamic marine environmental conditions. The direction of the ship's movement is controlled by the steering system, which is a crucial component in maintaining the smoothness and accuracy of the ship's journey. This steering system consists of various elements, one of which is the Rudder Stock. Rudder Stock has a vital role in the steering system because it functions as a link between the steering and the ship's propulsion system. Inside the Rudder Stock, there is another important component, namely the Seal. The Seal has the main function of withstanding pressure during ship operations, so that it can prevent leaks that can damage the steering system and other mechanical components. To evaluate the performance of the Seal in withstanding pressure, a pressure analysis was carried out using a numerical method based on Computational Fluid Dynamics (CFD) software, namely ANSYS. The results of the study showed that the total working pressure on the Rudder Stock Seal reached 0.766 bar, which is the sum of the maximum hydrostatic pressure of 0.432 bar and the maximum fluid flow pressure of 0.334 bar.
The Effect of Speed On Bow Thruster Tunnel Acoustics Using Computational Fluid Dynamics Methods Wahyudi, Dedy; Coutsar, Ardan Nagra; Nugroho, Putro Adi
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.
Design of Bus Material on Amphibious Bus as an Alternative Mass Transportation to Overcome Traffic Congestion in Jakarta Metropolitan Aprilya, Sonia; Aritonang, Sovian; Coutsar, Ardan Nagra
Jurnal Ilmiah Wahana Pendidikan Vol 10 No 4 (2024): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10537223

Abstract

According to the Central Statistics Agency of the DKI Jakarta Province, the number of motor vehicles in DKI Jakarta in 2021 reached 21,758,695 units, with motorcycles dominating at 16 million. With a land area of 64.5 km2, traffic congestion is inevitable. Because of this condition, this study proposes a mass transportation means that can pass through land and water, namely the Amphibious Bus. When in water, the most important part of a ship is the hull. Some requirements that must be met to design a ship's hull include being lightweight, corrosion-resistant, fire-resistant, and safe and comfortable for passengers. Several materials are considered as materials for amphibious buses, namely low carbon steel, alumunium, Fiberglass Reinforced Plastic, Stainless Steel. From the AHP comparison, low carbon steel and FRP have advantages in compressive strength, tensile strength, and bending strength compared to other materials. Meanwhile, aluminum has the advantage of corrosion resistance compared to other materials.
Fluid Dynamic Simulation of Sail Design Performance on Sail-Assisted Ship; A Preliminary Study Ariani, Betty; Ponidi, Ponidi; Coutsar, Ardan Nagra; Sadewa, Reno Adhianta
invotek Vol 23 No 3 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i3.1111

Abstract

Ships are a reliable means of transportation in an archipelagic country like Indonesia. The high use of fossil fuels in sea transportation is one of the contributors to emissions that needs attention apart from their dwindling availability. Efforts to use sails as an additional propulsion force on ships are one of the green technology issues in shipping for reducing the use of fossil fuels. It is about how the design affects the thrust on the ship. Tests were carried out on models M1, M2, and M3 in variations 0°, 30°, and 45° wind angles in computational fluid dynamic simulation at 12 knots constant speed. Through this article, there will be a discourse related to optimizing the design of the sail to produce energy efficiency and reduce the use of fossil fuels on ships. The shaped M3 makes greater thrust on the ships than the other two models. The tendency of a decrease in the thrust of the sails with an increase in the wind direction angle, the distribution of force in two directions, namely as normal and parallel to the sails, is suspected as the cause.
Co-Authors ., Ponidi Aprilya, Sonia Aritonang, Sovian Betty Ariani Dedy Wahyudi Nugroho, Putro Adi Prasetyawati, Dian Rizaly, Anastas Sadewa, Reno Adhianta